B5 Widebody engine problems

1973 Views 16 Replies 6 Participants Last post by That1guydotcom, Jan 31, 2016

passatevos

Discussion Starter · Sep 14, 2015 (Edited)

Ok, let me start by saying its been a long time since I've posted in this forum and for that I'm sorry . For those who don't know I've purchased B51.8TJUNKIE's Widebody passat and its engine trouble so I'm looking to you guys for assistance. I'm still having the same issue of rough idleing and the car stalling on down shifting and/or breaking. At this point I have a new (refurbished) ECU with stage 3 APR software on hand as well as the original ECU Jason sent in the car. At this point in time I've had a coolant leak repaired, replaced the PVC system from the crankcase with this (035103245AKT4 - Emissions Service Kit - ES#2587466) due to some leakages, tightened the hose on the DV b/c it came off on the highway at about 80mph under about 20lbs of boost. Something else I've noticed is I'm getting some black exhaust buildup inside the tailpipe. I'm not sure if it's running lean or rich (not educated enough). Additionally when I put the new ECU in it runs even worse.

Old ECU
Rough idle then settles around 800rpms
Boost is around 22lbs
Stalls on downshifting and breaking

New ECU
Rough idle- fluctuates between 600-1300rpms
When I press the gas it seems like its choking
I have not driven with the new ECU b/c it needs to be activated with the cruise control stalk which doesn't work (not even with the old ECU)

Additionally I've cleaned up the wiring nightmare behind the seat and behind the stereo and I've replaced the head unit.

Future projects
pull the headliner and replace it as it is sagging
replace front door speaker and passenger side component in trunk lid
Add A-Pillar quad gauge cluster that will house (Voltage, A/F Ratio, Boost, Shift light)

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VAGguy

· #2 · Sep 14, 2015

Any codes? It sounds like you have a bad vac leak somewhere with the stalling and choking. Check the Throttle body for carbon build up and the rest of the system for vac leaks. Check the air/fuel ratios.

PZ

· #3 · Sep 14, 2015

Welcome back.

You need to find someone with a vagcom to test the fuel trims. You also need to confirm the software matches the injectors in the car. With the black soot, it sound like you are running rich, testing the fuel trims would confirm this.

passatevos

Discussion Starter · #4 · Sep 15, 2015

Ok some of the things that I didn't mention I got a "low voltage terminal 30" error code when my local APR rep put the VAGCOM on it that's how we found the leaks on the crankcase PVC. The throttle body was cleaned and adapations were reset. When I used the scan tool at my local garage it came up with the two following codes P1613 and P1136. Additionally I'm running the blue injectors that come with the stage 3 kit. The new ECU is programmed for the upgraded injectors and I'm assuming by the records Jason kept the previous ECU was the same. So from what I've been reading about P1613 it sounds like a wire to the CEL was cut or falulty? Additionally for P1136 I don't know what/where the EVAP canister purge regulator valve is.

This is what I found out here in the forums about error code P1136
[h=4]Possible Solutions[/h]

Check Mass Air Flow (MAF) Sensor
Check Fuel Pressure Regulator
Check Fuel Pump
Check Intake/Exhaust System for Leaks
Check Secondary Air Injection for Leaks
Check Vacuum Lines for Leaks

[h=4]Special Notes[/h]

Fuel Trim Info
When this fault is stored and external vacuum leaks are not found, less obvious problems may be present:
- Check Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80)
- Check Brake Booster and Hoses
- Check Electric Vacuum Pump ( If Applicable )
- Check Crankcase Ventilation System for faulty components. When the PCV or Crankcase Ventilation System is faulty, vacuum is typically present under the oil cap and misfire faults are common.

This is what I found out here in the forums about error code P1613
[h=4]Possible Symptoms[/h]

Malfunction Indicator Lamp (MIL) not working properly

[h=4]Possible Causes[/h]

Malfunction Indicator Lamp (MIL) faulty
Wiring/Connectors from/to Malfunction Indicator Lamp (MIL) faulty
Control Module Cording incorrect
Heavy wear on ignition/starter switch (D) contacts

[h=4]Possible Solutions[/h]

Check Malfunction Indicator Lamp (MIL)
Check Wiring/Connectors from/to Malfunction Indicator Lamp (MIL)
Check Control Module Coding
Check/replace ignition/starter switch.

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VAGguy

· #5 · Sep 15, 2015

The N80 purge valve is on the passenger side where the airbox should be. It should be clicking pretty rapidly while the engine is running.

passatevos

Discussion Starter · #6 · Sep 16, 2015

VAGguy said:
The N80 purge valve is on the passenger side where the airbox should be. It should be clicking pretty rapidly while the engine is running.

this it?

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passatevos

Discussion Starter · #7 · Sep 18, 2015

If so I don't hear any clicking from it at all I'm not sure how loud it supposed to be though

Tomvw

· #8 · Sep 19, 2015

The clicking is usually loud enough to be obvious, but it doesn't click continuously all the time.
Check the resistance across the N80 coil, and check its wiring.
There should always be 12V at N80 pin 1 while cranking or running.

VAGguy

· #9 · Sep 19, 2015

You may not be able to hear it clicking, but you can put your hand on it and feel it click

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passatevos

Discussion Starter · #10 · Sep 19, 2015

Tomvw said:
The clicking is usually loud enough to be obvious, but it doesn't click continuously all the time.
Check the resistance across the N80 coil, and check its wiring.
There should always be 12V at N80 pin 1 while cranking or running.

Ok. I'll check it.

passatevos

Discussion Starter · #11 · Sep 21, 2015

I still haven't had a chance to check the N80 valve but yesterday at the NOPI shoe I had a guy pulle the codes for me and it came up with a P1128 error code and he told me I might need a spacer on my secondary o2 sensor. Does this sound familiar?

Tomvw

· #12 · Sep 21, 2015

17536/P1128/004392 - Ross-Tech Wiki
A spacer would not help that.

Check for vac leaks etc.

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passatevos

Discussion Starter · #13 · Oct 27, 2015

tomvw said:
the clicking is usually loud enough to be obvious, but it doesn't click continuously all the time.
Check the resistance across the n80 coil, and check its wiring.
There should always be 12v at n80 pin 1 while cranking or running.

it's reading 12v but Still having rough idle and stalling issues

Tomvw

· #14 · Oct 27, 2015

Check the resistance across the n80 coil, and check its wiring.

One pin is 12V, what is the voltage on the other pin while running ?

passatevos

Discussion Starter · #15 · Jan 20, 2016

Ok I've been away for a while b/c my car has been broke. I have several issues coolant and oil leaks and error codes

coolant - water pump replaced
oil - from valve cover and/or timing cover

CEL Codes
P1613 Mil control circuit
P1128 fuel trim bank 1 multiplicative system too lean

Anyone have any insight on the error codes?

Electron Man

· #16 · Jan 21, 2016

P1128 fuel trim bank 1 multiplicative system too lean

Indicative of a vacuum leak (long term trim too lean). If you can get the engine to idle, look for vacuum leaks (from hoses under intake manifold, in and around SJP, etc.) with an unlit torch set to low flow*. Engine speed will increase slightly when the propane is pulled in at the leak point. Obviously, make sure there are no open flames and the garage area is well ventilated.

*Low Flow: Light torch, reduce gas flow until flame almost out (~1 inch long flame), then put it out with a gloved hand

. This is "low flow" to me.

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That1guydotcom

· #17 · Jan 31, 2016

such a cool car

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