nigel253

Any one shed any light on my scooby. Its a 93 wrx with 41000 and standard apart from a magnex downpipe back exhaust. Ocasionally it goes fine and then performance drastically tails off. Other times it just hasn't any go in it. I have had the boost checked and is around the 14-15 psi mark. ithink that is correct. I have had it serviced new filters etc and this hasn't made any difference. My mate with a corsa beat me to the pub the other night. I was all over him on the twisty back roads but as soon as the road straightened he was away.

Please help because he reckons his car is as quick as a scooby

nigel

Clarey

What fuel do you use? Worst case scenario could be detonation

P.

Darren king

Nigel

I have a 93WRX which does this but when it plays up boost drops to 9psi.....does yours.

Looking at various posts this seems to be a common problem on the early imports, however nobody has said to me... 'replace this and it will cure it' , i know it isnt that easy but there must be a common cure.

If your boost drops off when it plays up suspect wastegate solenoid as i am trying to locate a second hand one.

This may not help that much but you are not on your own with this fault!

Regards

Daz

Yex

Nigel,

It may be worth your while to get your car down to ScoobySport and have Pete run it through his Subaru Select Monitor. My RB5 WR seemed to have lost it's ooomph, and was proven when put on a rolling road. I was running 232BHP which is very close to ProDrive figures, but only putting out 225LBS of torque instead of the 258LBS quoted - both whilst on max boost of 15psi.

I was asked by Pete to drive the car hard in gears 2-5 whilst he had the monitor set up on his lap. The car had retarded it's ignition by just over 3 degrees according to the monitor, probably because of crap getting into the tank from petrol stations running their supplies too low. The ECU in the car was reset and the difference was immediately apparent, normal smack in the back acceleration was resumed. Pete then showed me the graphs from the monitor and pointed out where the car had been backing off and therefore reducing boost and torque available, the adjusted graphs were smoother with no peaks or troughs apparent.

Hope helps

Yex

nigel253

Darren

If you are ever up peterborough way let me know and you can try my contol valve. I have had the boost tested and according to the tester the boost stayed spot on.

He seemed to think that there was a problem with the ignition somwhere.

Possibly a coil, but there isn't a sure way of testing them.

nigel253

Clarey

Im using super at the moment. The hessistation also happens low down the rev range. You can feel it in 5th gear from about 2300 onwards.

Any other idea's as it embarrising getting beaten all the time.

russell hayward

I thought the ECU "relearned" once the problem of the iffy fuel had gone ??

Sith

If I remember rightly from earlier posts. The ECU's on early cars are slow learners. Later models are somewhat quicker.

P.

mattski

Hi,

I've got an MY94 WRX and haven't had any of the problems you guys have. You could try the 'warp drive' technique...