hi, i have 93 wrx and latley i have noticed that when i accelerate hard the power seems to go on and off, can anyone tell me whats doing this.

[Edited by kid unknown - 6/27/2003 6:05:52 PM]

 

Evening mate

Just a thought but first port of call must be to check you ECU for fault codes. You will need to get have a look at the base of your steering column for 2 green and 2 black connectors. You will more than likely need to lay on your back with your head in the drivers side foot well. Look closely cos they should be there. You will need to connect the 2 black connectors and just turn on the ignition - DONT START THE CAR ! An ECU light should then flash at you. if it flashes on and off in time then you have no faults if however it flashes intermitantly then you have probably got a fault logged.

You can do a search on SN for ECU codes or reading CEL 's - there are loads of previous threads on the issue.

hope this helps

 

thanks ill go look for the plugs now

 

Do you notice the engine reving harder when it's not accelerating?If so, it could be the clutch slipping.

 

I had this problem with my 93WRX, I got a 95WRX ECU and all my ills were cured.

You could also check for air leaks i.e. check the piping under the intercooler, check the air filter pipes any sort of air leak will cause the same effect

 

i connectet the two black plugs and switched the ignition on. an engine check light came on which flashed on and off about once per second is that ok

 

That sounds like the ecu is fine(no faults found), try taking the MAF(mass air flow sensor) out and cleaning it with brake cleaner, that was the problem on my car when that sort of thing happened.

 

i have tested the ecu and apparently have no faults, i just today replaced plugs with ngk pfr6b's the clutch is fine as i tested on very big hill, i have k&n filter which still seems to be clean. its as though when you hard accelerate it seems to be going well then all of a sudden it gets a drop in power for second or so


[Edited by kid unknown - 19/07/2003 19:02:35]

 

Hi,

Does the power drop momentarily at about 4000rpm?

 

To my knowledge it is the coil packs, it is a very common problem on the subaru's. When new spark plugs are fitted, they sometimes damage the coil whilst being installed.

There are four coil packs (1 for each plug), usually its just the one coil pack which needs to be replaced. Price for 1 coil pack should be around 50.00+ pounds inc. installation.

Hope this helps