Driving to work this morning. The car started to stumble as I accelerated and when foot to floor she seems to hesitate as she approaches full boost.

 

If driving easy she's fine only when accelerating hard.

 

I have a new fuel pump, filter and F.Press.Regulator new plugs so dont think its a fueling problem

 

Recently converted to manual but Not sure how that would effect it.

 

No smoke from turbos so dont think its them . Car is stock mechanically 105K UK.

 

Wondering could it be air intake or Mass flow sensor??

 

Any help appreciated as I am off to France in the Car friday (supposedly)

 

Roy

Just typed out how it could be a plug breaking down and asking when the last change was -- and then read again that you've got new plugs!

 

Maybe a leak/split in one of the boost hoses? You dont hear a 'hiss' at all? None of the vacuum hoses popped off?

 

Have you taken the headlamp panel off and checked the connection to the mass? or done an ecu diag or reset?

I used to get a few spots of lag through the rev range from 0-100 in multible gears, I recently replaced my exhaust with a mongoose (back boxes on old one were shagged) and now its smooth all the way up :)

Run an ECU diag and let us know if you get anything.

It could be a number of things. Temp sensor - O2 Sensors - MAS - boost leak - tps.

Could also be the fuel pump controller - located just infront of the n/s/r wheel arch next to the back seat. You'll need a spare to swap it with though..

 

HTH

 

CheerZ,

 

Andy

Do you have stock air filters and was it raining when you were flooring it?

Originally posted by MikeGroves

I used to get a few spots of lag through the rev range from 0-100 in multible gears, I recently replaced my exhaust with a mongoose (back boxes on old one were shagged) and now its smooth all the way up :)

 

yeah, exhaust restriction due to cats and turbos is quite significant on these cars. Sometimes you gte more power by backing off on the accelerator :D

Originally posted by Nelson MainFella

yeah, exhaust restriction due to cats and turbos is quite significant on these cars. Sometimes you gte more power by backing off on the accelerator :D

 

I know how to drive my car forward thankyou :rolleyes:

Changed oil this evening and did and ECU reset, changed battery

 

Will clean throttle bodies and Mass air flow meter this evening hopefully that will sort it out

 

 

PS Yes I have stock air filters and no it was not raining.

 

How would a dodgy O2 sensor effect car performance??

 

Cheers

 

Roy

Originally posted by royztt

...How would a dodgy O2 sensor effect car performance??

 

It wouldn't under hard acceleration - it only affects it under cruise conditions ;)

 

CheerZ,

 

Andy

check for an exhaust leak, mine is blowing near the turbos and it's causing the exact same symptoms as yours.

 

Vijay