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VW MKIII-A3/B4 TDIs This is a discussion about MKIII-A3/MkIII Jetta/Golf (<99.5) and B4 Passats (96,97) TDI's. Non TDI related postings will be moved or removed.

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Old January 15th, 2007, 21:05   #31
rdkern
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Fuel Economy: A4 = wife drives it, don't know
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Hissing probably isn't good. Are you getting any codes? Is it warm enough for you to recognize any codes?
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Old January 25th, 2007, 12:11   #32
tornadored7
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Firstly many thanks for an excellent and well written diagnostic guide.

I have been experiencing low power at higher revs. Having just replaced the MAF I knew it probably wasn't that.

A local mechanic performed a VAG-COM fault code scan revealing one error:

00575 Intake Manifold Pressure, 17-10 Control Difference - Intermittent. The symptoms seem to match closely.

I was snooping around the engine, aquanting myself with the various hoses (required in step 2 of the diagnostic procedure), red, blue, black and Air intake (Intercooler-engine) to ECU hose.

Two main things alarmed me;

1) There seems to be engine oil leaking from a few places, but mainly from around the a) Crankcase breather regulator valve, b) the Camshaft cover and also from c) the Air intake pipe (Intercooler to engine) to ECU sensor hose.

2) Removing the Air intake (to ECU) hose, revealed engine oil leaking out.

Issue 2 is the most suprising. At low engine revs, air pressure can be felt, but at about 1600 RPM oil starts leaking out in addition to air.

Since this is hose is coming from an air intake pipe, I think something is clearly very wrong somewhere.

Would appreciate some advice on what is likely to be wrong, and also how to proceed.

Thanks.
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Old January 25th, 2007, 12:13   #33
tornadored7
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Sorry in addition to the above forgot to mention:

Car: Golf MK3 TDi
Engine: 1Z (90 BHP)
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Old January 28th, 2007, 15:10   #34
tornadored7
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The code is mentioned (but slightly hidden in the text);
Mechanic read VAG-COM fault codes as 00575:Intake Manifold Pressure -> 17-10:Control Difference Intermittent.

Last edited by BKmetz; December 21st, 2010 at 17:47.
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Old January 28th, 2007, 21:04   #35
Donny O.
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Quote:
Originally Posted by GoFaster
Step 2: Troubleshooting the "00575 Intake manifold pressure control difference" code

Usual symptoms: car temporarily runs OK after being started, but particularly in the higher gears, it loses power abruptly after a period of running under load. Power may or may not return temporarily by taking load off the engine and then resuming, and generally returns temporarily after switching off the ignition until the same load conditions occur again.
now this is exactly what my car started doing today....i've had it for 2 weeks. anyway should the check engine light be comming on if it's throwing the 00575 code? this happens at about 3000rpm in 4th gear but resets by turning off and on, but I get no check engine light. I have no way myself of checking the codes i would have to take it somewhere, but as i said i get no CE light when it happens. however I do ocasionaly get one on startup which I was told by the previous owner was jsut a common problem with the glow plug check, but they were jsut replaced.....no ill running when this happens.
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Donny O.
96 VW Passat TDi "00"
Bought 1-11-07 w/287K
334K as of 1-11-08
yup 46K in one year then the mods begin
Current: 386K miles
MODS...Muffler, Catectomy, RC3, Sprint 520's, B4 wagon springs, bilsten TC's
pictures of my vehicles
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Old January 29th, 2007, 21:00   #36
rdkern
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Donny - check the "diagosing power loss" sticky. Really good read.
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Old January 29th, 2007, 22:16   #37
Donny O.
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Quote:
Originally Posted by rdkern
Donny - check the "diagosing power loss" sticky. Really good read.
that is what this thread is.....but it says you get a code, but I'm not getting a check engine light..
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Donny O.
96 VW Passat TDi "00"
Bought 1-11-07 w/287K
334K as of 1-11-08
yup 46K in one year then the mods begin
Current: 386K miles
MODS...Muffler, Catectomy, RC3, Sprint 520's, B4 wagon springs, bilsten TC's
pictures of my vehicles
community.webshots.com/user/hondarrman
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Old January 30th, 2007, 08:14   #38
rdkern
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A code will not always throw a CEL. Scan it to see if one's there.
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Old January 31st, 2007, 00:15   #39
Donny O.
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Quote:
Originally Posted by rdkern
A code will not always throw a CEL. Scan it to see if one's there.
good info...jsut what I needed. thanks!!
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Donny O.
96 VW Passat TDi "00"
Bought 1-11-07 w/287K
334K as of 1-11-08
yup 46K in one year then the mods begin
Current: 386K miles
MODS...Muffler, Catectomy, RC3, Sprint 520's, B4 wagon springs, bilsten TC's
pictures of my vehicles
community.webshots.com/user/hondarrman
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Old February 10th, 2007, 16:15   #40
khb137
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I am have the same problem that you disscrib

did you find a fix

ken

khb137@msn.com
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Old February 14th, 2007, 01:20   #41
Donny O.
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Quote:
Originally Posted by khb137
I am have the same problem that you disscrib

did you find a fix

ken

khb137@msn.com
if you are refering to me then no. it has been a cold spell here the past few weeks(maybe part of the issue??) and didn't dare stand outside and work on the car. just don't get on it where it cuts off at and it has been fine!!
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Donny O.
96 VW Passat TDi "00"
Bought 1-11-07 w/287K
334K as of 1-11-08
yup 46K in one year then the mods begin
Current: 386K miles
MODS...Muffler, Catectomy, RC3, Sprint 520's, B4 wagon springs, bilsten TC's
pictures of my vehicles
community.webshots.com/user/hondarrman
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Old February 22nd, 2007, 18:57   #42
jim_arndt
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Angry A code will not always throw a CEL

Quote:
Originally Posted by rdkern
A code will not always throw a CEL. Scan it to see if one's there.
I confirmed this. I just bought a 97 Passat B4, the CEL light was on when I looked at it. I had the owner have the codes pulled, it came back with 00575. His mechanic cleared the codes and advised him to watch it.

I bought the car two weeks later, the CEL was not lit and the owner said he did not experience any loss of power.

Unfortunatly on my 60 mile drive home, I noticed a loss of power. Not being familiar with the car I wasn't exactly sure if this was normal or not. After a weeks worth of driving, it's clear it's entering limp mode.

My Vag-Com arrived today, this is what I got:


2 Faults Found:
00575 - Intake Manifold Pressure
17-00 - Control Difference

Time to start checking vacuum lines, and send Bruno to go collect from the previous owner.....
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Old February 23rd, 2007, 14:47   #43
rdkern
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Congratulations on the B4. And on knowing what's probably wrong with it.

Take apart the ecu - (which chip do you have?) and replace that little chunk of hose in there. You're going to love it when it's "right".
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Old April 18th, 2007, 22:32   #44
Steve777
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Looking for a bit of help with the vag-com readings here...

Which measuring blocks are they speaking of when checking the injection quantity etc? When I go to the engine and measuring blocks they are empty. Do I enter in the number for the block I want?

TIA
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Old August 26th, 2007, 08:39   #45
caddy shack
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Fuel Economy: 35 constant
Cool good article

This sounds like the problem I am haveing except I have a p-box and .216 injectors and was wondering if thy could be senting me into limp mode. When I get on it it will boost up to 20-22 psi when it is cold after it warms up If I go over 15 it will go into limp mode and won,t go above 12.
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