Help please!
I've had my classic impreza turbo 2000 for about 3/4 weeks and I have had constant running issues. The MAF was changed the day before I collected the car.
The issue seems to be when the car is at temperature it won't idle and just cuts out it feels like it has a loss in power and not boosting properly. I've changed the crank position sensor and the camshaft sensor as the crank position sensor was cracked. That solved the issue for a few days then it started running rough again so I did an oil and filter change on it and it was running fine for about a week. But now it's worse than it ever has been. It sounds and runs absolutely terrible. I've ordered and new knock sensor however I have had it plugged in today and on running the cam and crank sensors are switching between off an on? Is this normal? It's also over fueling too but I have no engine management light on my dash. I am getting ever increasingly frustrated with the car now because it'll run fine then it'll just throw a fit. Also the car has been mapped and is running at 294bhp.
Can anyone please give me some advice as im now clueless to what the problem is.

 

Depends what the mapper has done i think and did he know what he was doing so you need to go back to the mapper.

 

I have no idea who mapped the car as it was already mapped when I purchased it :-/

 

What year is the car,what engine management is it running and what mods have been done on the car?

 

It's a 2000 impreza turbo ej20.
It's had a remap and decat. As far as I know it was mapped with a decat but don't hold me to that. However the fmic and air filter was added after the map. When I do test mode and ecu reset it runs ok and over a couple days it gets worse?

 

Keep the car off boost and get it to a decent mapper! FMIC and an induction kit without a remap is likely to kill your engine very quickly.

 

Oh :-/ best fund a decent mapper then!

 

AP-Tuning
And Clive Atthowe Tuning
Are both well respected mappers who are close to you I believe.

 

Thank you I will have to have a look :-)

 

2000 turbo uk? what year is it? 97 98 99 2000 etc its confusing sometimes when people say turbo 2000

 

Yes it's a UK turbo. It's an early 2000 on logbook.

 

Clive Atthowe is my first choice

 

Bob Rawle, non better. BR Developments.

 

Without wanting to open a can of worms, how many mappers have you used to be able to state that, Jeff?