Author Topic: 1.9 TDI PD Limp mode ATD Engine *update*  (Read 3408 times)

Offline hamps

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1.9 TDI PD Limp mode ATD Engine *update*
« 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
« Last Edit: 31 October 2012, 21:50 by hamps »
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Offline Agreeable Slick

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Re: 1.9 TDI PD Limp mode ATD Engine
« Reply #1 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.

Offline hamps

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Re: 1.9 TDI PD Limp mode ATD Engine
« Reply #2 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!
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Offline hamps

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Re: 1.9 TDI PD Limp mode ATD Engine
« Reply #3 on: 18 October 2012, 08:25 »
Anyone? please? :cry:
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Offline Agreeable Slick

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Re: 1.9 TDI PD Limp mode ATD Engine
« Reply #4 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.

Offline mrapoc

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Re: 1.9 TDI PD Limp mode ATD Engine
« Reply #5 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

Offline Agreeable Slick

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Re: 1.9 TDI PD Limp mode ATD Engine
« Reply #6 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.

Offline hamps

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Re: 1.9 TDI PD Limp mode ATD Engine
« Reply #7 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:
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Offline hamps

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Re: 1.9 TDI PD Limp mode ATD Engine
« Reply #8 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:
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Offline hamps

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Re: 1.9 TDI PD Limp mode ATD Engine *update*
« Reply #9 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:
Demon Dipping UK
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