Help Required - Losing my mind: Loss of power....Changed everything!

[cagiti]

Hi Guys,

2001 S3 8L AMK no modifications (no history of remap either - as far as i know?!)

I'm hoping you can help me as I have come to the end of the road on this one at the moment.

July 2011: The problem seemed to start last year when the car felt low on power, so I diverted past the N249 valve.

July 2011: Then I received a Fuel trim bank (Mult) error. I noticed I had a perished Fuel Pressure Regulator pipe so I replaced it.

Aug 2011: Still had the error so I checked for vacuum leaks and what not, reading the forum for help. Couldn't find anything!

Nov 2011: Replaced the N75 valve (part from Audi) as I read that this could be an issue.

All winter of 2011 I was scratching my head so I decided to bite the bullet and took it to an Audi/VW specialist in Swansea.

Jan 2012: He checked the pipes under the inlet manifold for leaks and said they were all fine. He then said that when he unplugged the MAF and drove it up the road it was a lot better. I also got him to undivert the N249 valve. He replaced the MAF with a Bosch MAF. The car felt a little better but still not right.

May 2012: Took car to garage and had an intermediate service and ask him to see if he could diagnose the performance issue. He said the spark plugs were ****** and he could not find any issues with the engine.

May 2012: I read after a post from tuffty that if the Bosch MAF was not purchased from Audi then that could be causing an issue. It turns out the Bosch MAF was not from Audi, so I replaced the cheapo Bosch MAF with an Audi Bosch MAF. The car did run a little better, still not performing right!

Jun 2012: I noticed that after accelerating the brake pedal was hard, also after cruise control being on. Then did a bit of research and found that I had a crack in the pipe from the brake servo to the inlet manifold. I thought "YES", I have got it. I replaced the pipe last Saturday morning and last Tuesday evening at 5000rpm the car is still shuddering and engine light flashing. I checked the fault codes and I got the following:

16684/P0300/000768 - Random/Multiple Cylinder Misfire Detected
16685/P0301/000769 - Cylinder 1 Misfire Detected
16688/P0304/000772 - Cylinder 4 Misfire Detected

I've read that this could be multiple things!!! As I don't have VAGCOM and am a little stuck does anyone have any ideas on where I should go next?

To top it all of the indicator relay is playing up .

Any help is appreciated, cheers!

P.S. To top it all off a yellow Ford Puma kept up with me last night....I felt like cr@p!!!!!

 

[s3dave]

I would check the coil pack wiring, strip it all back, as the insulation disintegrates with the heat cycles...

 

[cagiti]

I would check the coil pack wiring, strip it all back, as the insulation disintegrates with the heat cycles...

s3dave, cheers for the help....much appreciated!!! What am I likely to see if the wiring has disintegrated.....bare wire? Also, is the wiring within a loom or taped up etc?

Thanks again.

 

[s3dave]

Its in a loom taped up, you need to strip it back, yes bare wires....

 

[sportstractor]

Had the actual coil packs changed? Wiring is obvious, if it's breaking down you will see it fairly close to coilpack connections, I had to strip my AMK wiring back to beneath the inlet mani, it hadn't been affected past that point, so I wired up a new loom from there.

 

[cagiti]

Cheers Guys, yes I forgot to mention that Audi replaced the coil packs under the recall March 2011.

Think I will have to do some investigation this weekend!

 

[guzzy_431]

I'm experiencing simular problem to you Cagiti. I had a Diagnostic check here are faults that came up.
-Bank 1 camshaft a ( Intake )
-****** setpoint not reached
-( Over advanced ) pooil Intermittent.
I've been told I need to replace timing belt & water pump. My car went in garage today, the work is being carried out. Hopefully tomorrow it should be fixed for GTI INTERS for Sunday & The problem resolved.

 

[guzzy_431]

duplicate msg ignore

 

[The Doctor]

When did the problem start? You had your coil paks replaced in March 2011 and you say it started last year - could these things be connected I wonder? Your latest fault codes suggest so.

 

[Gops]

Those codes sounds like coilpacks or wiring, check them, also get your car either logged and post the results do people can tell you what your car is doing or/and get it smoke tested because the lack of power seems like a boost leak.

 

[marantz2]

I have the same problem and have seen that my wiring loom near the coils is corroded. Have re-taped each wire and things seem better but dont know if its a placebo kinda thing