im soon going on the rollers with my car but have a hesitation problem that i need to sort before i go what it is if i floor my car not on the road by the way when the revs get to about 5000rpm the car stutters badly and holds back but if i pick speed without flooring it hard it doesnt do it,

it still has the import restrictor on it could it be anything to do with this.

Have you cleaned the TPS? made sure its fastened correctly?

Have you cleaned the TPS? made sure its fastened correctly?

 

still a bit ov a zed virgin wots the tps.

wooops sorry

 

its the throttle position sensor

 

 

 

its number 22 in that diagram, mine and smw1's have both caused similar problems when the contacts have been dirty.

ok thanks for your help il take a look at that take it itl just be same on my car its na.

i had a very similar thing on my previous car, it was a leaky dumpvalve, you may have the same sort of problem here, ie an air leak.

 

what used to happen on mine was that if you booted the boost must have spiked and it used to push up the diapragm in the dump valve up and air used to leak out, the solution was to buy a meatier spring to keep the valve shut.

just like you though if i didnt hoof it then it wouldnt do it, presumably because my boost wasnt spiking.

 

so imho i reckon you have an air leak somewhere.

i had a very similar thing on my previous car, it was a leaky dumpvalve, you may have the same sort of problem here, ie an air leak.

 

what used to happen on mine was that if you booted the boost must have spiked and it used to push up the diapragm in the dump valve up and air used to leak out, the solution was to buy a meatier spring to keep the valve shut.

just like you though if i didnt hoof it then it wouldnt do it, presumably because my boost wasnt spiking.

 

so imho i reckon you have an air leak somewhere.

 

ok cheers il have a closer look around and see what i can find.

im soon going on the rollers with my car but have a hesitation problem that i need to sort before i go what it is if i floor my car not on the road by the way when the revs get to about 5000rpm the car stutters badly and holds back but if i pick speed without flooring it hard it doesnt do it,

it still has the import restrictor on it could it be anything to do with this.

could be the import limiter, i had mine took off, £65 from z centre. Could be coil packs or spark plugs need replacing. or your air flow meter needs adjusting. let me know

 

cheers

 

zedman2

could be the import limiter, i had mine took off, £65 from z centre. Could be coil packs or spark plugs need replacing. or your air flow meter needs adjusting. let me know

 

cheers

 

zedman2

 

im hoping its something to do with the import limiter cos i intend to take it off soon.

could be the import limiter, i had mine took off, £65 from z centre. Could be coil packs or spark plugs need replacing. or your air flow meter needs adjusting. let me know

 

cheers

 

zedman2

How do i adjust the airflow meter? :bow:

You carn't its electronic, you can adjust the TPS thou

im soon going on the rollers with my car but have a hesitation problem that i need to sort before i go what it is if i floor my car not on the road by the way when the revs get to about 5000rpm the car stutters badly and holds back but if i pick speed without flooring it hard it doesnt do it,

it still has the import restrictor on it could it be anything to do with this.

Before you go out and blow your hard earned cash, get someone with a Conzult to run diags for you. If I would of done this 2 years ago I could of saved alot of the 7k I spent in bits and labour and bad diagnostics. The best test you can run with ANY engine problems is a compression test. This will tell you alot about the condition of the engine and should allways be a starting point

 

Keep it simple and start from basics...

This is a TPS problem without a doubt.

Clean the TPS connector and reset your ECU.

Problem will be solved.