DiddyWRX

On my 93 WRX what does the boost solenoid look like and how do u clean it out, what size are the pipes and how do u clean them out too?

Thanks folks!

silent running

It's on the front of the offside suspension turret on my later classic. There is a rat's nest of various sensors, hoses, wires etc right there, and one of them is the boost solenoid. Your early WRX should have a 3-port which should be the most easy to get at, with three separate vacuum hoses going into it, one top, one bottom and one side, plus an electrical plug. It will probably say Denso or Unisia Jecs on it, I can't remember.

DiddyWRX

So just clean out all the pipes with brake cleaner and shoot brake cleaner into the where the pipes go yes?

And the electrical thing? Clean how?

DiddyWRX

Anyone? Someone must have done this as it's a common fault or so I've heard!

myblackwrx

iTrader: (1)

By 'electrical thingy' do you mean the solenoid itself?
If so give it a squirt of brake cleaner as well.

DiddyWRX

Lol yes, indeed, just that when I fit new plugs and coilpack tommorrow I want to clean that out too and fingers crossed my full throttle woes will finally be over!

myblackwrx

iTrader: (1)

I see you're sticking a z4 in your car, when i did mine the the car was a lot smoother to drive

DiddyWRX

I've also been quoted some nice power gains from it aswell, 20bhp increase and obviously the ability to wind the boost up more safely with supporting mods!

myblackwrx

iTrader: (1)

Don't expect 20bhp (i did and was dissapointed when i didn't get that much) you may get it or you may not but you will get an increase and it feels a lot smoother to drive.

DiddyWRX

Hmm I was told there will be a significant BHP increase fitting the chip, at least 19.5bhp as they run differently and more boost to the U8

darryl.k

What problems are you getting at full throttle then? I think I may be having similar problems.

Darryl

DiddyWRX

See my other post (WRX questions), basically at full chat it was holding back on occasion then giving full power, I removed a coilpack and it was shot to pieces and I had a cracked plug, all being replaced 2moro!

silent running

You need to join the two test connectors near the steering column. IIRC they're the two green ones. Turn on the ignition and everything will start whirring and clicking. Put rags everywhere and start blasting out the solenoid through every port while it's clicking away.

DiddyWRX

Good plan I shall do that tommorrow! are they plugs or bare leads you have to connect?

Claaarkio

iTrader: (1)

Did mine a few days ago, Disconnected all the hoses squirted some brake cleaner into the solenoid, then connected a 4mm vac hose i had hanging about, connected the green connectors and then manually blew through the solenoid, then repeated a few times, I changed the exhaust port with a different shorter hose (transfered the restrictor) all seems to be running fine now.

Dave

DiddyWRX

I've just fitted new plugs all round, 1 new coilpack as the other was shot and a Z4 ecu. PLUS cleaned out the boost solenoid and pipes with brake cleaner.

Running problems seem sorted and the car is certainly faster even if it is only running 1psi more it's MUCH better and stronger and smoother now!

Big thanks to everyone!

myblackwrx

iTrader: (1)

Now perhaps you should possibly look at the brakes as the standard 2 pots are terrible.

DiddyWRX

Well if I slam on it stops so for the moment they're fine!

myblackwrx

iTrader: (1)

Fair enough

DiddyWRX

But I know what you mean matey, I will upgrade brakes before more power!