1.8t cupra pulling problem?

[sxboy200]

not long brought a 51 plate cupra and its got a bit of a problem pulling through the gears. i dont no the best way to describe this but its ok when u put ur foot right down pulls like a train but at low revs or (half throttle building up the revs it starts to pull then it doesnt then it does again) bloody thing, was wondering if any 1 else has had a problem like this. ive put a new airflow meter on it and coolant temp sensor but still no better. also when u back of the throttle slightly it pops through the exhaust and doesnt deacclerate slowly, i really dont have a clue. it has a forged dump valve and a cat back exhaust. any help would be very very gratefull!!!!!!!!!!!!

 

[Mr OCD]

not long brought a 51 plate cupra and its got a bit of a problem pulling through the gears. i dont no the best way to describe this but its ok when u put ur foot right down pulls like a train but at low revs or (half throttle building up the revs it starts to pull then it doesnt then it does again) bloody thing, was wondering if any 1 else has had a problem like this. ive put a new airflow meter on it and coolant temp sensor but still no better. also when u back of the throttle slightly it pops through the exhaust and doesnt deacclerate slowly, i really dont have a clue. it has a forged dump valve and a cat back exhaust. any help would be very very gratefull!!!!!!!!!!!!

Another old 200sx owner?

You need to run some logs with VAGCOM fella... to see whats up with the car.

 

[Willie]

Sounds like a sticky throttle

 

[Joe K]

Are you talking gunk inside the throttle body itself

 

[Willie]

Perhaps, was just a thought

Or a dodgy throttle position sensor

 

[Joe K]

Perhaps, was just a thought

Or a dodgy throttle position sensor

Could be a number of things i surpose VAGCOM only way to start really

 

[sxboy200]

i have thought about throttle position sensor but no idea where it is or the throttle body, it is like ur on and off the throttle untill u floor it then its ok, its been plugged into a diagnostic machine but just coolant temp sensor came up, replaced that engine management light went off but still same problem. also wot is VAGCOM?

 

[Willie]

Thats the diagnostic thing you got your car plugged into.

 

[sxboy200]

ok will get it pulgged in again and see if it comes up with anything else, any ideas if it says nothing????

 

[Willie]

If your not too sure about the mechanics of your car then your really in the hnads of the garage

 

[Joe K]

ok will get it pulgged in again and see if it comes up with anything else, any ideas if it says nothing????

As Willie said really try cleaning the throttle body

 

[sxboy200]

ok i will give it a go, thanks 4 the tips.

 

[evokid]

I had a similar thing on my TT, it turned out to be N75 boost valve...

 

[Joe K]

I had a similar thing on my TT, it turned out to be N75 boost valve...

Does that come up on VAGCOM as a fault

 

[james walker]

if you run some logs it will show, if its bust totally then a code will come up.

get it scanned mate and post the results

 

[sxboy200]

i changed the n75 boost control valve and still no different, gona have 2 plug it in to a machine i think!!

 

[Mr OCD]

i changed the n75 boost control valve and still no different, gona have 2 plug it in to a machine i think!!

Checked DV? - When was serviced last?

Checked TB for cleanliness and readapt?

No point guessing and throwing money at it ... get VAGCOM and see what fault codes are showing.

Has it been remapped?

 

[sxboy200]

no not remapped just dump valve and cat back exhaust, ill get it plugged in again, last time it only had coolant temp sensor code come up, changed that made no difference the engine management light went out though, now its come back on and im still at square 1!!!

 

[sxboy200]

i think its due a service about now, last time it was on a diagnostic thing it only come up coolant temp sensor, changed that light went off after a couple of days but made no difference in holding back, light has come back on again and back 2 square 1. not checked the throttle body yet (not really sure where it is) no it hasnt been remapped just a dump valve and a cat back system

 

[adam cupra 20vt]

Its on the end of the inlet manifold the intercooler pipe connects to it.