EarlParkly
Guest
Hi guys,
Before I start, I have done a search on this and couldn't find anything that conclusively matched my symptoms/circumstances.
I recently bought a 2002 TDI SE 1.9 110 with 125k on the clock which was having "limp mode" problems. I then did the following to try and fix and have put what happened next to it:
- Cleaned the MAF Sensor = Very slight improvement (if at all) to performance but no Limp Mode Fix.
- Replaced the Vacuum hoses = Very slight improvement (if at all) to performance but no Limp Mode Fix
- Did "Mr Muscle turbo clean" and WD-40'd the turbo actuator = Noticable improvement to performance and LIMP MODE FIXED!!
Now, to get on to the problem I'm now having (I wanted to provide the above history in case it's related) - In 3rd-5th gears under moderate-heavy acceleration, the acceleration very noticeably decreases at 2,500 rpm (I guess you could call it a flat spot). There is no limp mode style cap to revs and the turbo still appears to be spooling (it will still push on to the red line too), albeit slowly.
It's a tad concerning because before I fixed my Limp Mode, this "flat spot" was not there at all (it revved nicely right up to around 3,300 rpm (where Limp Mode would be triggered with the usual turbo-less, rev-limiting symptoms, only fixed by a switch off and on).
Hopefully, now limp mode is fixed, it's just unhidden a underlying problem (rather than me causing one, eek), but I'd like some advice on what to try next. My research has lead me to think it could be the N75, MAF Sensor or MAP Sensor but it would be helpful to know any other suggestions and what's the most likely candidate. I'm getting no dashlight at all through any of the above, btw.
If there's anyone nearby who would be willing to lend me one for a quick test, I'd be very grateful too (I'm over in Lincoln, East Midlands and of course am willing to travel to meet and give a few beers
).
Thank you.
Before I start, I have done a search on this and couldn't find anything that conclusively matched my symptoms/circumstances.
I recently bought a 2002 TDI SE 1.9 110 with 125k on the clock which was having "limp mode" problems. I then did the following to try and fix and have put what happened next to it:
- Cleaned the MAF Sensor = Very slight improvement (if at all) to performance but no Limp Mode Fix.
- Replaced the Vacuum hoses = Very slight improvement (if at all) to performance but no Limp Mode Fix
- Did "Mr Muscle turbo clean" and WD-40'd the turbo actuator = Noticable improvement to performance and LIMP MODE FIXED!!
Now, to get on to the problem I'm now having (I wanted to provide the above history in case it's related) - In 3rd-5th gears under moderate-heavy acceleration, the acceleration very noticeably decreases at 2,500 rpm (I guess you could call it a flat spot). There is no limp mode style cap to revs and the turbo still appears to be spooling (it will still push on to the red line too), albeit slowly.
It's a tad concerning because before I fixed my Limp Mode, this "flat spot" was not there at all (it revved nicely right up to around 3,300 rpm (where Limp Mode would be triggered with the usual turbo-less, rev-limiting symptoms, only fixed by a switch off and on).
Hopefully, now limp mode is fixed, it's just unhidden a underlying problem (rather than me causing one, eek), but I'd like some advice on what to try next. My research has lead me to think it could be the N75, MAF Sensor or MAP Sensor but it would be helpful to know any other suggestions and what's the most likely candidate. I'm getting no dashlight at all through any of the above, btw.
If there's anyone nearby who would be willing to lend me one for a quick test, I'd be very grateful too (I'm over in Lincoln, East Midlands and of course am willing to travel to meet and give a few beers
).Thank you.
