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Model specific boards => Golf mk4 => Golf mk4 TDI => Topic started by: hamps on 17 October 2012, 09:07

Title: 1.9 TDI PD Limp mode ATD Engine *update*
Post by: hamps on 17 October 2012, 09:07

Hi guys, my golf keeps going into limp mode :cry:

It is not bringing the light on and if you switch off and restart its fine for a while!?

It is an auto 5 speed.

I have removed the inlet manifold and the turbo and done a full thorough clean with innotec turbo clean

which give it it's power back but now this.

when i scan it keeps coming up kickdown sensor, but kickdown works fine ???

Any ideas?

Thank you

Title: Re: 1.9 TDI PD Limp mode ATD Engine
Post by: Agreeable Slick on 17 October 2012, 09:13

Check all of your boost hoses, one has probably either split or comes loose under load resulting in overboost and then limp home mode.

Title: Re: 1.9 TDI PD Limp mode ATD Engine
Post by: hamps on 17 October 2012, 09:17

Yes this is one of the first things I checked they are all good, I also fitted a new sensor in the intercooler and replaced all the bulkhead pipes with silicon jobbies, and I swapped all the N75 things etc with known working ones off a mates car i'm stumped!

Title: Re: 1.9 TDI PD Limp mode ATD Engine
Post by: hamps on 18 October 2012, 08:25

Anyone? please? :cry:

Title: Re: 1.9 TDI PD Limp mode ATD Engine
Post by: Agreeable Slick on 18 October 2012, 08:41

Get down a scrappers that has a auto golf box, swap over sensors to see if it works or not. It may be working fine, but the ECU see's a lot more inputs than you do.

Title: Re: 1.9 TDI PD Limp mode ATD Engine
Post by: mrapoc on 18 October 2012, 18:59

without trying to sound thick but how can it overboost when a hose has popped off? wouldnt that cause underboost

Title: Re: 1.9 TDI PD Limp mode ATD Engine
Post by: Agreeable Slick on 18 October 2012, 22:48

It won't register any boost, so it will keep the turbo spooling (in order to produce some as it cannot differentiate between a hole or the boost being used) to such a point as the ECU decides it is over boosting, then shut it all down to protect the engine.

Title: Re: 1.9 TDI PD Limp mode ATD Engine
Post by: hamps on 22 October 2012, 21:01

yeh i have a kickdown sensor to try, going to try a speed sensor too will update my findings, cheers guys  :smiley:

Title: Re: 1.9 TDI PD Limp mode ATD Engine
Post by: hamps on 30 October 2012, 17:57

Right an update  :smiley:

Got the code p1155 off of the ethos, manifold pressure sensor G71, so I have ordered a MAP sensor from the main stealers for tomorrow so fingers crossed  :whistle:

Title: Re: 1.9 TDI PD Limp mode ATD Engine *update*
Post by: hamps on 31 October 2012, 21:52

I changed the map sensor today, cleared the codes and 20 miles so far all good  :grin:

So it got treated to new lower arms, drop links and a service  :cool:

Lets hope it behaves itself now! :whistle: