jmodge
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Reread my comment
1986 Toyota 4runner - ALH Swap - Electronic Turbo Actuator Issues
- Thread starter Jerretxx
- Start date
Jerretxx
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sent. Will see if we get a response referring to the specifics of the MAP. From what I read factory is 2.5, I’ve seen a 3.0 available. What other BAR rated MAPs are there for these engines?
jmodge
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You have the wrong MAP sensor for that turbo if it’s factory 2.5bar. He will know what sensor he tuned it for
jmodge
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And also make sure the tune is for that turbo, maybe the previous owner changed the turbo without changing the tune
Jerretxx
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I dont know if it is or is not factory. It is a VW sensor when you search it on GOOGLE you get a few different items but this one looks to be an upgraded to 4 BAR.
jmodge
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Ok, that sounds better. Get VCDS and run whatever logs he wants then before much else. He should probably see this thread @BustedBolts
Jerretxx
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Thanks for your help. You’ve given a lot of good input. I really appreciate it. I’ll get VCDS downloaded tomorrow (if Ross-tech) confirms my computer. And I guess I’ll have to wait for the connector to show up. Keep you guys posted
Jerretxx
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jmodge
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Hard saying, Nelson will know and probably figure it out quickly. I was leaning toward an electrical issue with the actuator because of the way it flipped position in your earlier photos. Kind of looked like it’s closing the vanes and staying there
Jerretxx
Well-known member
you are exactly right. When it goes to limp mode, the actuator stays closed. When I get the dusky clear or reset the MAP, actuator goes back to open idle position.
Like I told Nelson via email, I have no documentation that he did the program. I don’t have a receipt or anything but the person that built the truck specifically said tekmektronics tuned the truck. So going off word at that moment, but when I provide the data to Nelson from VCDS we will hopefully make forward progress
Jerretxx
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Ross-Tech VCDS has been ordered. 
Jerretxx
Well-known member
VCDS arrived and what a great product.
drove around today for approx 40 miles while tied into VCDS.Truck did not enter limp mode, drove it easy, hard, highway, in-town, started and stopped multiple times. Also stopped to idle multiple times.
previously when the truck would enter LIMP mode, my edge insight would read map pressure of 36PSI and be stuck at that reading. The edge will not read anything greater than 36psi on the MAP sensor. (Old Pic Below)
VCDS had a reading of the following and the truck did not enter limo mode:
RPM 3,003
ECT 96.3C
Intake Air Temp 58.5C
Manifold absolute pressure 2689.2 MILLIBAR (39.00 PSI)
N75 charge pressure (44.2%)
will continue to monitor and collect data
Did have the following fault code after driving:
drove around today for approx 40 miles while tied into VCDS.Truck did not enter limp mode, drove it easy, hard, highway, in-town, started and stopped multiple times. Also stopped to idle multiple times.
previously when the truck would enter LIMP mode, my edge insight would read map pressure of 36PSI and be stuck at that reading. The edge will not read anything greater than 36psi on the MAP sensor. (Old Pic Below)
VCDS had a reading of the following and the truck did not enter limo mode:
RPM 3,003
ECT 96.3C
Intake Air Temp 58.5C
Manifold absolute pressure 2689.2 MILLIBAR (39.00 PSI)
N75 charge pressure (44.2%)
will continue to monitor and collect data
Did have the following fault code after driving:
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I have been doing a ton of research on MAP sensors over the last day or so since I need to replace mine with a 3 bar since I upgraded my turbo. I'm sure someone may know better, but it sounds like the MAP sensor is either flakey or the tune was made thinking the car had a 3 bar map or something.
VCDS logs should show this to the tuner, if it is the problem he should see it in the tune but be sure to mention that you have a 4 bar map installed and you want to make sure it's tuned for that. You don't want to just pick up a 3 bar to test this theory as a change to a different bar MAP could easily kill your turbo if the tune is written for it.
Jerretxx
Well-known member
I ran the numbers in my MAP and according to what it interchanges to, I have a 4 bar installed in my truck.
I spoke to Nelson with tekmektronics and the tune was written for a 4bar sensor also
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Jerretxx
Well-known member
@Kramer these are pictures of my MAP and the interchange I located in Google. Problem I found is that most of the “aftermarket or upgrade” are Bosch which is going to be a different part number than VW. And the one installed on my engine is stamped VWI dont know if it is or is not factory. It is a VW sensor when you search it on GOOGLE you get a few different items but this one looks to be an upgraded to 4 BAR.
Jerretxx
Well-known member
drove the truck again this afternoon. approx 30 minutes. no issues with the truck, did record a lot of data, looks like my MAP pressure max was just shy of 36 psi (last column is the N75 position cut the title off)
Jerretxx
Well-known member
I have the same issue that is described in the forum below, however my CTS will connect (at some point). some times the CTS connects when the truck starts, sometimes its 1 mile, sometimes its 10 miles or 10 minutes. I was very excited to see that VCDS communicates without issue. the data is instant unlike the CTS.
forums.tdiclub.com
Edge Insight CTS not working
Hey everyone! Brand new here I just introduced myself in the introduction thread. So my new to me Jetta is throwing several codes. I was told about some of them when I bought the car, but there are even more that I did not know about. The car runs well, but I would like to address them if I...
Jerretxx
Well-known member
Drove truck a lot today. Scanning with VCDS the entire time. Truck operated as it should. Great throttle response, boost, and performance.
Saw MAP pressure as high as 2478.6 (35.94 PSI) without issue or truck going to limp mode.
Will continue to monitor.
Saw MAP pressure as high as 2478.6 (35.94 PSI) without issue or truck going to limp mode.
Will continue to monitor.
Jerretxx
Well-known member
Finally was able to capture the LIMP mode/actuator today on VCDS. Truck only hesitated for a few seconds (first time pulling out of my driveway, then started responding about 200 yards down the road. then about 30 seconds later it hesitated again for a few seconds. when the MAP reads 972 and the N75 read 92 is when the issue is occurring. see data below:
the MAP reading of 972 is lower than it reads in idle. see idle data below at 1050 RPM:
Idle Data for 1008 RPM:
DTC after issue:
the MAP reading of 972 is lower than it reads in idle. see idle data below at 1050 RPM:
Idle Data for 1008 RPM:
DTC after issue:
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Jerretxx
Well-known member
Capture the high MAP Pressure Fault today and it latched in like it has in the past, see data below:
MAP Pressure jumped to 3700+ MILLIBAR which put the truck into limp mode. actuator stayed at 94% until I stopped and brought the truck back down to idle
MAP Pressure jumped to 3700+ MILLIBAR which put the truck into limp mode. actuator stayed at 94% until I stopped and brought the truck back down to idle
Jerretxx
Well-known member
Installed a replacement MAP sensor tonight. Seems to have made a big difference. Will continue to monitor.
Jerretxx
Well-known member
Drove truck all day today. No issues. Truck has been operating as it should. Truck has been idling like it should. Will continue to monitor.
can someone send me a picture of where the CCV comes back into the intake on a 1.9L ALH engine? Factory preferably, seeing a lot of mixed images on google and curious how the factory hoses routed into the intake.
can someone send me a picture of where the CCV comes back into the intake on a 1.9L ALH engine? Factory preferably, seeing a lot of mixed images on google and curious how the factory hoses routed into the intake.
Jerretxx
Well-known member
It’s been over 1 week. Still no issues. Truck is idling as it should and running as it should. I think we can call this complete