timmyjmy93wrx

Hi all

i have a 93 wrx full decat, K7N induc. Blitz 77 plugs, bailey dump valve and my Z4 ecu chippd from scott t to 15.5psi bout 5-6 weeks ago.
Now the car, for the past week has hesitated on gentle accelration and on hard whether hot or running cold.
Last night i removed the K&N and dump valve, i now have a tad less power at high revs but runs better but the hesitation is still there. I have no CEL's and have tried re-setting the ECU.
Can anyone shed any light on this?
I'm guessing at the coil pack(s) and/or fuel pump not good enough or even the actuator? i dont know!!!!. Or could it even be something else?

Thanks for any ideas / help

tim

[Edited by timmyjmy93wrx - 1/9/2004 11:25:15 AM]

dnb

You've got the right ideas. Sounds like coil packs to me...
ScoobyECUs tend to show up any weakness in the coils and in the wastegate solenoid.

You could try regapping the plugs to 0.6mm as a test. If this makes things better then there is at least a dodgy coil. It's not a proper fix though!!

Now for the bad news, they're £59 EACH from a dealer, and you may need anywhere between 1 and 4 of them (I'd not go 2nd hand on these, as it could prove a false economy - unless they're cheap!)

Group buy on coils, anyone??? As I need at least one (maybe more) too!

timmyjmy93wrx

Thanks for that

but where is and what does the wastegate solenoid hide / look like
how much new?
or can it be fixed?
I'm intrested in a group buy on the coil packs too !!!!!!

dnb

Look on the drivers side inner wing, at the back of the airbox. There is an assembly with a black box, a brown cylinder type thing and a shiny cylinder. The shiny one is the wastegate solenoid.

I doubt that this is causing the hesitation - problems here are usually such things as the boost limited to 0.6 bar.

timmyjmy93wrx

Thats good and bad news!

good - i know that bit!
bad - it has happened a couple of times since i have had the car (6 months)and put the boost to about 8psi or bit less on me boost guage.
so can i fix it or new one on the cards, any idea where from my local subaru dealers dont want to know with being an import.

dnb

It's an easy fix involving a spray can of brake cleaner and putting the car in test mode. I'm about to disappear now, so I'm afraid you'll have to do a search for "Cleaining boost solenoid" I remember a thread from about 2 years ago...

TonyBurns

iTrader: (3)

What fuel are you running?

Tony

Scott.T

iTrader: (2)

disconnect the Lamda sensor and see it it runs any smoother.
It won't log any error codes for while.
If it runs smoother then change it for a universal 4-wire item which gives a better ground connection.

from autospares,com (or something like that, about £35)

If that's no good then clean the MAF with a cotton bud and some carb or brake cleaner.

Plugs or Coil packs are also a very likley cause.

timmyjmy93wrx

Thanks for the replies guys

Over the weekend i cleaned my boost solenoid valve, put intake and injector cleaner through it, cleaned the MAF and checked for damaged leaking pipes.

Still no luck im afraid, im going to try taking the plugs out and setting them at 0.6 to see if it runs better as dnd stated, may point out the coil pack being dodgy.
Me plugs are only about 4months old so cant see them being a problem.
Oh and im using shell optimax, without octane booster because i got a scooby chip which is supposed to be ok for fuel alone.
Another prob is that the boost is not reaching 15.5psi. The lower the gear the less boost it can get and quicker it falls. When i am in 5th it can reach 15psi and holds for a while then drops slightly - will this be part of the prob with coil packs or the actuator?!?

muly

timmy- i have the same prob on m y93 wrx and ,will be getting new coil packs for that very soon, that is if the dealer will sell me them lol, got turned away last time cos i wanted a mirror, and was told "sorry dont deal with imports only UK vin numbers here"

dnb

I'll post the part number up here tonight - no VIN needed then

muly

Cheers mate ,that would be a big big help

are uk coil packs the same as imports then?

[Edited by muly - 1/13/2004 3:01:21 PM]

timmyjmy93wrx

Muly

Could you let me know how your car is running when you get your coil packs changed mate
Appreciate it

I also put me k&N back on it revving better got a bit more life back into it but still got the prob!



[Edited by timmyjmy93wrx - 1/13/2004 8:11:00 PM]

muly

i will keep you informed mate ,should be this week i hope, i'm expecting a big bill, as i am getting a new clutch aswell(£350), soon as the packs are done i will let you know

John

dnb

Part number: 22433AA330

The only difference I could see was a different colour "potting compound" used to seal them... The resistances were the same, and import ones worked in my car.