Stuttering acceleration, noise, and engine vibration

borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Awesome, thanks for the info. How do I go about reading voltages for the crank sensor wiring with the vcds (if that's possible)? Hard to get to without removing the oil filter housing to check with my meter.

Already replaced the fuel filter so I hope it's not that. Couple questions though. The lid on the fuel filter housing, how pertinent is it to be flush/sealed? One of the bolts stripped out, and that area of the lid has a gap about 1/8" where as the rest is flush.

I also noticed on the inside of the lid, there's a plastic portion that seats against the top of the filter. There's an o ring around this. When removing it, I noticed a small hole just below the oring groove. Maybe an 1/8" in diameter, though I wouldn't say it's a circle. That's why I'm asking as it's not a circle and almost looks like a tool or something punctured it. Not sure if this is normal or if it would affect anything, as the lid seems to just seal the fuel filter housing, and that's done alabove the hole at the o ring. Though I'm not sure how the fuel feed, return, and whatever the 3rd line is, work inside/through the lid.


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borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
got the autoscan done, went through the document and deleted anything with no fault found. Note that the driver door electric shows a fault due to the **** harness VW skimped on. I have non stock tires for the pressure sensors. I disconnected the cam sensor plug and maf plug trying to see if id get a change in the running condition, likely why those are on there, but not 100%. Also have an aftermarket touchscreen from Eonon installed.


Chassis Type: 1K (1K0)
Scan: 01 02 03 08 09 0F 15 16 17 19 1C 25 42 44 46 47 52 56 62 65
72 7D

VIN: 3VWFT71K46M852588 Mileage: 393260km-244360miles


09-Cent. Elect. -- Status: Malfunction 0010
0F-Digital Radio -- Status: Cannot be reached 1100
15-Airbags -- Status: Malfunction 0010
19-CAN Gateway -- Status: Malfunction 0010
42-Door Elect, Driver -- Status: Malfunction 0010
47-Sound System -- Status: Malfunction 0010
52-Door Elect, Pass. -- Status: Malfunction 0010
62-Door, Rear Left -- Status: Malfunction 0010
65-Tire Pressure -- Status: Malfunction 0010
7D-Aux. Heat -- Status: Malfunction 0010
-------------------------------------------------------------------------------
Address 01: Engine Labels: 038-906-016-BEW.lbl
Part No SW: 03G 906 016 AC HW: 028 101 223 9
Component: R4 1,9L EDC G000DG 7551
Revision: --H05--- Serial number: VWZ7Z0F9021111
Coding: 0050078
Shop #: WSC 00066 000 00000
VCID: 6491AB6F425215874DF-8030

6 Faults Found:
005269 - Switch-Over Valve for EGR Cooler (N345)
P1495 - 000 - Open or Short to Ground
Freeze Frame:
Fault Status: 01100000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 393266 km
Time Indication: 0
Date: 2000.00.00
Time: 17:08:21

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 12.77 V
Bin. Bits: 00101000
Mass Air / Rev.: 1000.0 mg/str
Mass Air / Rev.: 0.0 mg/str

005658 - Glowplug for Cylinder 1 (Q10)
P161A - 000 - Open Circuit
Freeze Frame:
Fault Status: 01100000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 393266 km
Time Indication: 0
Date: 2000.00.00
Time: 10:18:24

Freeze Frame:
RPM: 126 /min
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 11.10 V
Bin. Bits: 00101000
Temperature: 6.3°C
Bin. Bits: 01110000

005659 - Glowplug for Cylinder 2 (Q11)
P161B - 000 - Open Circuit
Freeze Frame:
Fault Status: 01100000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 393266 km
Time Indication: 0
Date: 2000.00.00
Time: 10:18:24

Freeze Frame:
RPM: 126 /min
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 11.10 V
Bin. Bits: 00101000
Temperature: 6.3°C
Bin. Bits: 01110000

005661 - Glowplug for Cylinder 4 (Q13)
P161D - 000 - Open Circuit
Freeze Frame:
Fault Status: 01100000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 393266 km
Time Indication: 0
Date: 2000.00.00
Time: 10:18:24

Freeze Frame:
RPM: 126 /min
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 11.10 V
Bin. Bits: 00101000
Temperature: 6.3°C
Bin. Bits: 01110000

000258 - Mass Air Flow Sensor (G70)
P0102 - 000 - Signal too Low - Intermittent
Freeze Frame:
Fault Status: 00110000
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 393267 km
Time Indication: 0
Date: 2000.00.00
Time: 10:58:53

Freeze Frame:
RPM: 756 /min
Speed: 0.0 km/h
Load: 0.0 %
Duty Cycle: 100.6 %
Bin. Bits: 00101000
Mass Air / Rev.: 465.0 mg/str
Mass Air / Rev.: 0.0 mg/str

012295 - Camshaft Position Sensor (G40)
P3007 - 000 - No Signal - Intermittent
Freeze Frame:
Fault Status: 00110000
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 393267 km
Time Indication: 0
Date: 2000.00.00
Time: 10:12:22

Freeze Frame:
RPM: 777 /min
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 14.67 V
Bin. Bits: 00101000
Idle Stabilization: 0.0°KW
(no units): 48.0

Readiness: 1 4 0 0 0

-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels:. 3C0-937-049-23-H.lbl
Part No SW: 3C0 937 049 Q HW: 3C0 937 049 Q
Component: Bordnetz-SG H46 1501
Revision: 00H46000 Serial number: 00000000499498
Coding: 14018E234004150007140000001400000028770B5C0000
Shop #: WSC 00066 000 00000
VCID: 372B2C23A3442E1F38D-8062

Subsystem 1 - Part No: 1K1 955 119 E Labels: 1KX-955-119.CLB
Component: Wischer 051206 020 0501
Coding: 00065535
Shop #: WSC 00066

3 Faults Found:
00987 - Lamp for Brake Light; Left (M9)
012 - Electrical Fault in Circuit
Freeze Frame:
Fault Status: 01101100
Fault Priority: 1
Fault Frequency: 1
Reset counter: 81
Mileage: 333390 km
Time Indication: 0

Freeze Frame:
ON
Voltage: 14.45 V
ON
ON
OFF
OFF
ON

02394 - Parking Light Left Front (M1)
012 - Electrical Fault in Circuit
Freeze Frame:
Fault Status: 01101100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 81
Mileage: 342504 km
Time Indication: 0

Freeze Frame:
ON
Voltage: 12.55 V
ON
ON
OFF
OFF
OFF

00978 - Lamp for Low Beam; Left (M29)
010 - Open or Short to Plus - Intermittent
Freeze Frame:
Fault Status: 00101010
Fault Priority: 1
Fault Frequency: 254
Reset counter: 121
Mileage: 345431 km
Time Indication: 0

Freeze Frame:
ON
Voltage: 14.45 V
ON
ON
OFF
OFF
ON


-------------------------------------------------------------------------------
Address 0F: Digital Radio
Cannot be reached

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 1K0-909-605.lbl
Part No SW: 1K0 909 605 AB HW: 1K0 909 605 AB
Component: 6A AIRBAG VW8R 034 8000
Revision: 05034000 Serial number: 003B6D078GYC
Coding: 0013889
Shop #: WSC 00066 000 00000
VCID: 6C81C34FAA825DC705F-8038

Subsystem 1 - Part No: 1K0 959 339 F
Component: BF-Gewichtsens. 007 0005

Subsystem 2 - Serial number: 6332MSME132E7F41I

Subsystem 3 - Serial number: 6342MSME12465F7DP

Subsystem 4 - Serial number: 6351HSME0B421D59C

Subsystem 5 - Serial number: 6361HSME0B3C4E6AS

Subsystem 6 - Serial number: 63727SME0B2F214A5

Subsystem 7 - Serial number: 63827SME0B2F186AE

4 Faults Found:
01221 - Crash Sensor Side Airbag; Driver Side (G179)
008 - Implausible Signal - Intermittent - MIL ON
01221 - Crash Sensor Side Airbag; Driver Side (G179)
010 - Open or Short to Plus - Intermittent - MIL ON
00532 - Supply Voltage B+
002 - Lower Limit Exceeded - Intermittent - MIL ON
02513 - Belt Force Sensor for Seat Occupied Recognition (G453)
003 - Mechanical Failure - Intermittent - MIL ON

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels:. 1K0-907-530-V2.clb
Part No SW: 1K0 907 530 H HW: 1K0 907 951
Component: J533__Gateway H12 0150
Revision: H12 Serial number: 31001069221977
Coding: 3FBF0B620F001002
Shop #: WSC 00066 000 00000
VCID: 2C01034F6A029DC745F-8078

2 Faults Found:
02649 - Digital Radio Tuner
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 36
Mileage: 343781 km
Time Indication: 0
Date: 2000.00.00
Time: 02:51:32

00532 - Supply Voltage B+
002 - Lower Limit Exceeded
Freeze Frame:
Fault Status: 01100010
Fault Priority: 3
Fault Frequency: 1
Reset counter: 41
Mileage: 390101 km
Time Indication: 0
Date: 2000.00.00
Time: 13:41:28


-------------------------------------------------------------------------------
Address 42: Door Elect, Driver Labels:. 1K0-959-701-MIN3.clb
Part No SW: 1K0 959 701 P HW: 1K0 959 793 L
Component: J386 TUER-SG FT 1127
Revision: 32008001 Serial number: 00000047469129
Coding: 0001205
Shop #: WSC 00066 000 00000
VCID: 3B2330139F6C0A7FDC5-806E

3 Faults Found:
00932 - Electric Window Motor; Drivers Side (V147)
005 - No or Incorrect Basic Setting / Adaptation - Intermittent
Freeze Frame:
Fault Status: 00100101
Fault Priority: 3
Fault Frequency: 1
Reset counter: 85
Mileage: 0 km
Time Indication: 0

01552 - Motor for Central Locking; Drivers Door (V56); Lock
012 - Electrical Fault in Circuit - Intermittent
Freeze Frame:
Fault Status: 00101100
Fault Priority: 3
Fault Frequency: 31
Reset counter: 113
Mileage: 384077 km
Time Indication: 0

00928 - Locking Module for Central Locking; Front Driver Side (F220)
008 - Implausible Signal
Freeze Frame:
Fault Status: 01101000
Fault Priority: 3
Fault Frequency: 254
Reset counter: 81
Mileage: 0 km
Time Indication: 0


-------------------------------------------------------------------------------

-------------------------------------------------------------------------------
Address 47: Sound System Labels: 3C0-035-456.clb
Part No: 1K6 035 456 A
Component: 08K Audioverst. 0005
Revision: 00003000 Serial number: 00000000101911
Shop #: WSC 00000 000 00000
VCID: 2A0D055760F683F7B73-807E

4 Faults Found:
00871 - Bass Speaker Front Right (R23)
011 - Open Circuit
00870 - Bass Speaker Front Left (R21)
011 - Open Circuit
00876 - Treble Speaker Rear Left (R14)
006 - Short to Plus
00877 - Treble Speaker Rear Right (R16)
006 - Short to Plus

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. Labels:. 1K0-959-702-MIN3.clb
Part No SW: 1K0 959 702 P HW: 1K0 959 792 L
Component: J387 TUER-SG BT 1127
Revision: 32008001 Serial number: 00000586069110
Coding: 0001204
Shop #: WSC 00066 000 00000
VCID: 3C21330F9A620D47D5F-8068

1 Fault Found:
00110 - Right Mirror Turn Signal Lamp (L132)
012 - Electrical Fault in Circuit - Intermittent
Freeze Frame:
Fault Status: 00101100
Fault Priority: 5
Fault Frequency: 254
Reset counter: 121
Mileage: 250462 km
Time Indication: 0


-------------------------------------------------------------------------------
Address 56: Radio Labels:
VCID: 55F786AB1C08FC0FCA1-FFFE


-------------------------------------------------------------------------------
Address 62: Door, Rear Left Labels:. 1K0-959-703-GEN3.clb
Part No SW: 1K0 959 703 Q HW: 1K0 959 795 J
Component: J388 TUER-SG HL 1115
Revision: 12005001 Serial number: 00000000799384
Coding: 0001168
Shop #: WSC 00066 000 00000
VCID: 3E2539078C7E1F57FBB-806A

2 Faults Found:
00930 - Locking Module for Central Locking; Rear Left (F222)
008 - Implausible Signal
Freeze Frame:
Fault Status: 01111000
Fault Priority: 3
Fault Frequency: 254
Reset counter: 81
Mileage: 329796 km
Time Indication: 0

01554 - Motors for Central Locking; Rear Doors; Lock
012 - Electrical Fault in Circuit
Freeze Frame:
Fault Status: 01111100
Fault Priority: 3
Fault Frequency: 254
Reset counter: 81
Mileage: 329796 km
Time Indication: 0


-------------------------------------------------------------------------------
Address 65: Tire Pressure Labels: 3C0-959-433-65.lbl
Part No SW: 1K0 959 433 CD HW: 1K0 959 433 CD
Component: RDK 0420
Revision: 00051000 Serial number: 00000000000000
Coding: 0100101
Shop #: WSC 131071 1023 2097151
VCID: 74B1DB2FF2B28507DDF-8020

1 Fault Found:
01521 - Sensor for Tire Pressure
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 4
Fault Frequency: 4
Reset counter: 41
Mileage: 390122 km
Time Indication: 0
Date: 2000.00.00
Time: 10:25:04


-------------------------------------------------------------------------------
Address 7D: Aux. Heat Labels: 1K0-963-235.lbl
Part No SW: 1K0 963 235 E HW: 1K0 963 235 E
Component: PTC-Element 0404
Revision: 00800000 Serial number:
Shop #: WSC 00000 000 00000
VCID: 2D070E4B511894CF521-8078

1 Fault Found:
00361 - Heater Element for Auxiliary Heater (Z35)
014 - Defective

End----------(Elapsed Time: 01:48, VBatt start/end: 12.3V/12.3V)-----------
 

borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Here are the values I knew to get. Where do I check my timing? I looked on Ross tech and it said to go to group 000 then click switch to basic. Won't allow me to go to group 000 and the switch to basic button is greyed out.


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crazyrunner33

Veteran Member
Joined
Jul 11, 2006
Location
NC
TDI
'10 Golf(bought back)
I'll have to drink some coffee and look at this on the bigger monitor. Some notes:

1) on the fuel filter housing, if it's not sealed enough and is allowing air in, it'd definitely create a rough running engine. I haven't dealt with those issues on the TDIs I've owned, but I know from other diesels that it's possible to leak air into the system without leaking fuel back out

2) your recorded cam position sensor fault came at around the the same time as your glow plugs faults. That can be a bit more than a coincidence.

4) your injector deviation is a bit out of range
 

crazyrunner33

Veteran Member
Joined
Jul 11, 2006
Location
NC
TDI
'10 Golf(bought back)
Group 004. Your cam torsion is -3.4. That might be too far out(certainly is for my comfort). I'd plug your sensors back in and see if that's still the value. If it's still -3.4. I'd make tiny adjustments and advance the cam to around 0 to 1.0. Even if that's not the issue, the car will run much better once the issue is solved.

https://youtu.be/pAEmqvUpKEY

It's an easy adjustment to make.
 

borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
I'll work on fixing the fuel filter lid and setting my timing. And clearing all the data and retesting for values. Let me know what you find when you get a chance to take a look. Appreciate it!

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borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Ok so got the timing dead on at 0.0 the first try. So that's neat. My injectors are at -.9, +2.99, -1.4, and -2.3. Only the 2nd injector at 2.99 isn't fluctuation. The other move maybe .05.

Note the engine has only been running a few minutes. Wasn't sure whether to drive it to warm it up as there's the issue of it running poorly.

Only engine DTCs through auto scan are the glow plugs, EGR, and new one for a misfire on cyl 2. Which tells me that injector is bad as it's also not fluctuating like the others.

If I'm wrong let me know. Open to ideas on what to check next.

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crazyrunner33

Veteran Member
Joined
Jul 11, 2006
Location
NC
TDI
'10 Golf(bought back)
Before assuming it's a bad injector, remove injection harness from the cylinder head and clean the connector. If that doesn't fix it, pull the valve cover and check the connections on the injector. You have known issues on the harness elsewhere, I'd rule that out 100 percent before replacing anything.

What's the actual DTC for the injector?

Here's a thread to refer to:
http://forums.tdiclub.com/showthread.php?t=245549
 

borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Don't remember the exact code. But I didn't get the electrical code as seen from your link, just the misfire code. Been freezing here and my car is an hr away, so I'll have to check my connections. Where is the injector harness connector located (not the individual injector connectors)?

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crazyrunner33

Veteran Member
Joined
Jul 11, 2006
Location
NC
TDI
'10 Golf(bought back)
There's a big round connector on the right side of the head near the tandem pump. No tools are needed to remove it, there's a tab to hit and it'll rotate off. If cleaning doesn't work, I'd pull the injector harness from under the valve cover and take it inside to test with a multimeter(check continuity and resistance). It's easy to remove the harness, there's two screws I think on the connector to the head, then unclip the connector to each injector and pull the harness out.

If the injector harness checks out, then it's likely an issue between the connector and the ECU, or the injector. You can inspect the cam while you have the valve cover off, never a bad thing to check on these cars.
 

borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Thought that was the glow plug connector...it's been a couple years so maybe I'm mixed up. I'll check it out.

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borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Checked injector wiring. Doesn't seem to be any issues. I did notice that the first time I read the group 013 for injectors, that the 2nd and 4th both read about 3.0. However the second time the 4th was 1.5. I read them again while wiggling the harness and connectors to see if anything fluctuated, which it did not. However this 3rd time reading them the 4th was back at 2.99-3.0 and after idling for about 5 or so mins began dropping to about 2.8, however I didn't wait to see where it would end up.

So I'm going to go ahead and swap the 2nd cyl injector with a used one. I have a few questions on this. I've read up on it, but want to check a few things.

1) what size and grade are the hold down bolts (the smaller ones more prone to stretching)
2) do I need to rotate the engine with the wheels off the ground when setting the lash?
3) do I need to replace the injector oring, and if so what size(s) do I need?
4) is there anything else I need to replace or check while that one injector is out?

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borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Ok so after a bit of research I learned that the torsion value will read 0.0 and a p0304? (Implausible signal from cam sensor) will show if the timing is too far out. So adjusted and I'm at +1.0.

From 1-4 my injectors read -1.6, 2.99, .5, and -3.01.
However they change as I'm driving. The last cyl will go to -1.8. The 1 and 3 move as well. Though number 2 never does.



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borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Re set the lash and 1 and 3 are under 1.0. 2 and 4 show the values climb until they stop at 2- 2.99 and 4-3.01

No longer have a misfire code for cylinder 2 either.

Read Frank's simplified lash setting. I also use a dial gauge. I wanted to clarify that the injectors/spring are compressed when performing lash. Cyl 1,2,3,4 from cam belt side or passenger side to driver side. 1 and 2 cyl have ex lobes on the left side of injector roller and 3 and 4 have ex lobe on right side of roller.

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Last edited:

borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Checked wiring from outside the block connector to ecu. Disconnected on both sides. Not shorts, ohms at 0.5. I'll check from the connectors at the injectors to the inside of the block tomorrow. If all shows good, is there anything I should check before relaxing an injector or two?

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borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
2.4v at each injector connector with key on. All ohm at .5 from injector to engine harness. Moved the connector prongs for a tighter fit. And overlayed the grn/brw wire from round connector to ecu. No change.

Going to go ahead and replace the injector and see what happens.



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borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
swapped injector. Not sure on values as my VCDS decided to not find the interface. But it still ran poorly. Hopefully someone can chime in and give me a direction to go.

Car is still an hour away so super fun to drive back forth, but ill be towing it home this week and performing a compression test.
 

crazyrunner33

Veteran Member
Joined
Jul 11, 2006
Location
NC
TDI
'10 Golf(bought back)
Do you still have the DTCs for the cam position sensor and MAF showing up?

Other reasons for the large deviation would be injector related issues(potentially a supply or return issue, injector seals, etc), a cam related issue, or low compression on a cylinder.

A cheap compression test tool from the Horrible Freight or rental from an auto part store would do. You can test from the glow plugs, you should be seeing 450 psi or more.

There's other things you can try, but if you're running out of time and patience, I'd take it to a guru and explain the steps you've taken so far. I've had great luck with Marty, he's over in your neck of the woods.


http://www.martinbergelllc.com/index.html
 

borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
No DTCs for anything but glow plugs 1, 3, and 4, I think it was, and the EGR DTC which is set for the N3XX vacuum switch being shorted/open, but that is due to the EGR delete and one of the ports on the valve being blocked. Unless Im incorrect and theres and issue with the wiring there. I dont recall what I should be reading at the pins (2 pin connector iirc). If someone knows I can check. Also the misfire DTC would go away but come back after clearing DTCs and starting/turning off after a few cycles during testing.

Im unsure of current status for any DTCs or values after swapping the #2 injector as my VCDS wasnt working.

I am not necessarily pressed on time. I will be towing the vehicle home tomorrow or this weekend and can update any new values/symptoms/etc,

I did however notice that after idling the vehicle during testing approx (5min) then going and undoing the vacuum line on the back of the valve cover there was a release of pressure I could hear. Is that normal? I understand pressure may build up and the vacuum system uses this. Not sure it should be high enough to be audible once vehicle is off.

I also have oil, maybe fuel showing on the front driver side of the block under the head gasket, but not below the valve cover to head gasket. Its not dripping or anything but more of a discoloration/damp. Honestly its been like that quite some time. I am not sure if its from the pump side of the valve cover leaking (i believe its common/prone here to oil leaks), from the pump itself, or where. No mixing of fluids, but I havent run a compression test yet either. When I run a compression test, how do I determine if the injector seals are leaking v. bad cylinder/rings v whatever else it could be? Im more versed in gas engines and doing compression tests to determine causes.
 
Last edited:

borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Alright. So got a compression tester, unfortunately it leaks down and doesn't maintain the PSI. But #1,3,&4 hit about 180psi - I know it would be higher if it maintained the needle positon on the gauge and if the engine was warmed up. #2 shows nothing. Needle doesn't move. Could be due to me swapping the injector and a leak at the injector?

Other bad news, 2 of the glow plugs tips are damaged. One has a gouge? About halfway on the tip and the other is missing part of the tip. I don't remember what cylinder it came out of, but I'm gonna go ahead and say this means I've had a small piece of metal banging around in my cylinder.

So, where to go from here? I'd think the next step is to rent a camera to see inside the cylinders to inspect them, and remove the metal bit. Recheck my injector on #2. And retest my compression with a new gauge that doesn't leak down.

If after doing this, my compression in #2 is matching, but I'm still running rough, what are your suggestions?

If after doing this my compression has not changed, what should I check next?


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borjawil

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Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
Ok, so a piece of the glow plug did not come off. But there was a gouge or break. Like something hit it, not like it degraded/corroded.

So where should I go from here?

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crazyrunner33

Veteran Member
Joined
Jul 11, 2006
Location
NC
TDI
'10 Golf(bought back)
Sorry for the late response, I've been out of town a lot lately.

You mention either fuel or oil leaking around the head gasket, damage to the glow plug, and no compression on that cylinder. Unfortunately, it's likely time to pull the head.

There's a lot of things that need to be checked out, the cam, the head, finding the source of the damage, confirm to see if the rods are bent or rings are shot, etc. It'll probably be a wise choice to have a guru(Marty is a good guy in your areahttp://www.martinbergelllc.com/index.html) get their hands on the car and at least diagnose the issues.

You need to confirm if the lower end is any good and if the head needs to be rebuilt.
 

00SamIAm00

Member
Joined
Jun 15, 2019
Location
Hollywood, FL
TDI
2014 Sportwagen w/sunroof and sound
I had bad vibration and shuttering from time to time too. After getting most of my emission stuff replaced under waranty, still ran pretty rough. Started to hear a little noise in the clutch maneuvering, and decided it was time for a clutch replacement. Upon inspection found a very tired center on the dual mass flywheel. The flywheel was my culprit...
 

borjawil

Veteran Member
Joined
Oct 4, 2015
Location
lansing, MI
TDI
2006 Jetta "Diesel"
its been a year and ive just now gotten around to the car again, aka a giant pos that has cost me almost what i paid for it. Any who, pulled the #2 injector i had swapped in, noticed the top of it had lines/grooves unlike the other ones that were smooth. Decided to put a seal kit on the old one just to see if there was any changed. Still no compression.

What should i check on the cam? Its rather new and im not sure how it would cause no compression...maybe the lifters being chewed through would cause no compression? If everything on the cam is good, ill pull the head. Other than obvious piston and valve damage, gasket being blown damage, what should I be looking for? Id say if I dont see any of the above issues and the pistons all move (id think if there was a connection rod issue id hear it?) then cracked head or valve seals? if I dont see the above stuff, I was going to take the head to a shop and have them look it over. How would I go about determining bad rings? I know in gas engines oil in the cylinder would bump the compression. Same idea here?
 
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