Is there anyone out there who could help me please. The problem I am experiencing with a 1995 Jap WRX is that it cuts out the acceleration between 4000 and 5000 rpm. If I suddenly want to take off it will quit accelerating at 3000rpm but if I gradually build the acceleration up slowly it will go to the 4000/5000 rpm and and give up acceleration. I also notice it is running without the turbo kicking in. When travelling at constant speed of roughly 60 / 80mph the accleration will shiver... I am confused... what could it be... Please help :-(

 

has it had any mods?

I've just had a similat problem due to a failing FCD.

A diognostic check said it was the map sensor.

Jeremy

 

It came with so many electronic gadgets that were removed at the SVA centre in order to pass the tests. The only mod it has remaining is the induction kit. First I thought it was a loose earth wire, but when that was secured... still the same problem.

 

Funny that thats the first thing my dealer did was re-site the earth on the ECU.

Is it running standard boost?

Jeremy

 

I believe it could be running on standard boost but at the moment the turbo seems that it is sleeping, because it does not kick in.

 

if you floor it does the turbo start to spin then cut out with a huge jolt?

Jeremy

 

Pardon my ignorance but what is the FCD. Also to let you know which may help is that I had a full service done to it which did not solve any problems, the air flow regulator was replaced, I chnged the ECU (from another same year and spec WRX) and had the coolant resevoir changed... still nothing??? :-(

 

It difficult to explain... the car does accelerate, but not under the influence of the turbo it seems. Because when the turbo kicks in, one should feel a sudden burst of energy... but even past the 3000rpm limit when the turbo should come alive... it doesn't. So that's why I suspect the turbo is not even coming in effect. I can't really hear it whiring but that may be because the exhuast is loud. As I accelerate the velocity dies... and then catches up and then dies... It's like when you reach the limit on a restricted car. (But this is derestrcted)

 

FCD - Fuel cut defender, this absorbes the signal from the ecu when the max boost level is exceeded. My car was running 1.3 bar because i have the fuel controller (this should be ok) and at that point am using 25% more fuel - the standard ECU will not allow this boost on my car MYOO - so I need the FCD to fudge the ECU.

This is hopefully a silly question but you havent got loads of smoke coming out of the exhaust?!

It could be the MAP sensor otherwise you need to get a donor car to try all the obvious bits.

Jeremy

 

It isn't fuel related is it? have you checked the fuel filter and fuel pump?

Justin

 

Yes Justin... checked all of that... I just can't understand what it could be??? I am quite distressed. If I take it to a Scooby specialist they will charge £000's for a £50 job!!!