Hi everyone, got a bug wrx which has just developed a problem;

I will try and provide as much information as possible;

This weekend i changed spark plugs and also put an STi intercooler on, i work in the motor trade so i am competent enough to do the work, after doing this drove it round the block and all was fine.

This morning i had to fill her up because the fuel level was really low, which is a first for me so drove steady to fill her up, then after filling up drove normal to work and basically when throttle is 100% its fine but the second i let off or try to let off and re-accelerate it jerks like theres no fuel supply or something?

This only happened at high speeds / revs, i thought maybe fuel supply but then it works fine initially when 100% throttle..... Could i have sucked some crap up from the bottom of the tank?

I filled up using tesco 99 as i always do, and the fuel pump has been uprated to a walbro 255 so im confident it isnt that,

Any ideas would be helpful,

Thanks

 

Is there a vacuum leak any where, that you can see/hear

 

Thanks for the reply mate, think I've worked it out....

Forgot to plug maf sensor in like a ****!

 

let us know if that sorts it out mate

 

I would have thought you'd need a remap after a larger intercooler, non?

 

Will let you know what it's like on the way home from work, thanks

 

Well looks that's what the problem was lol, can't believe i left it unplugged!

Thanks for the replys people