Hi all need some help. Too cut long story short I bought a 1997 Impreza turbo few months bk with blown 1st gear. Replaced box ran it up selected all gears was fine. Went to drive it up the street yesterday and it won't boost it just hesitates and backfires sounds ruff as hell. Not sure on bhp think it's just a uk spec engine with exhaust, filter and a front mount intercooler. I also have no CEL light on either. Any suggestions as what too look out for would be appreciated. Thanks

 

Start with MAF sensor but it could be anything.

 

Check in the passenger footwell, behind the carpet and see what ECU it is. No CEL light might point to an aftermarket ecu. worth a look. If it is a standard ECU then try a fault code check to see if anything flashes up. The symptoms you have described could be a millions things but MAF or another sensor fail will probably be the cause, ECU fault code check should cast you in the rightish direction.

 

Put some fresh fuel in it. How long was it sitting?

 

Thanks for replies. Turned out to be boost pipe wasn't sitting right on the turbo looks as tho it's been cut a little to short maybe had a bigger turbo in past. Now have a worse problem once car is above say 40 it starts to shake the car really bad like the worse vibration u can think of it won't stop till u stop the car then pull off it fine get above 40 an the same I'm so confused now that I'm giving it a few more days to be solved then it's getting broke for bits

 

check all your gearbox mounts and your propshaft mounts

 

Gearbox mounts look fine propshaft feels secure only thing I can think of is that the pins that keep driveshafts secure to gearbox are not fitted could this cause a bad vibration