Fed up and stuck
06 May 2006, 09:24 PM
#1
Scooby Regular
Thread Starter
Join Date: Dec 2004
Posts: 324
Likes: 0
Received 0 Likes
on
0 Posts
Fed up and stuck
It's the usual chestnut - poor idling - Hunting, idle speed drops to low, engine stalls etc. It tends to do it when the engine is hot. I think this problem is also giving me the violent hiccuping as I let the clutch up, unless I keep the revs high by slipping the clutch.
The car has a new O2 sensor, MAF and plugs
I've thoroughly cleaned the ISCV with brake cleaner
If I unplug the MAF, the engine doesn't stall, although it runs much rougher
I can't find any inlet pipe air leaks or pipe damage
The HT leads look to be in good order.
Don't know what else to do....There are no error codes.
I have a Blitz dump valve. I've seen comments they can give problems. Should I change it? Perhaps I should buy a new ISCV? Bet they aren't cheap though and they might not fix the problem. Perhaps I should ditch the Pipercross induction kit and install the standard airbox (better for the MAF?).
Getting fed up with these cars. Not enjoying ownership at present.
Oh yeah, it's an STi 4 Type R.
Anyone any advice or words of encouragement?
David
The car has a new O2 sensor, MAF and plugs
I've thoroughly cleaned the ISCV with brake cleaner
If I unplug the MAF, the engine doesn't stall, although it runs much rougher
I can't find any inlet pipe air leaks or pipe damage
The HT leads look to be in good order.
Don't know what else to do....There are no error codes.
I have a Blitz dump valve. I've seen comments they can give problems. Should I change it? Perhaps I should buy a new ISCV? Bet they aren't cheap though and they might not fix the problem. Perhaps I should ditch the Pipercross induction kit and install the standard airbox (better for the MAF?).
Getting fed up with these cars. Not enjoying ownership at present.
Oh yeah, it's an STi 4 Type R.
Anyone any advice or words of encouragement?
David
06 May 2006, 09:34 PM
#2
Scooby Regular
Join Date: Jan 2006
Location: North Wales
Posts: 931
Likes: 0
Received 0 Likes
on
0 Posts
If the Dump Valve is a single piston one it can give very bad idle i suggest try changing that to a standard one or one that is definatly twin-piston or that you know works fine on a Impreza.
If thats not the problem try removing the induction kit and fitting a standard air box, if this caused the MAF to break then it could have done it instantly to the new maf.
If thats not the problem try removing the induction kit and fitting a standard air box, if this caused the MAF to break then it could have done it instantly to the new maf.
06 May 2006, 10:07 PM
#3
Scooby Regular
Thread Starter
Join Date: Dec 2004
Posts: 324
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by GazJenno
If the Dump Valve is a single piston one it can give very bad idle i suggest try changing that to a standard one or one that is definatly twin-piston or that you know works fine on a Impreza.
If thats not the problem try removing the induction kit and fitting a standard air box, if this caused the MAF to break then it could have done it instantly to the new maf.
If thats not the problem try removing the induction kit and fitting a standard air box, if this caused the MAF to break then it could have done it instantly to the new maf.
Thanks
David
07 May 2006, 01:06 AM
#4
Scooby Regular
Join Date: Feb 2006
Location: Anywhere that will have me!
Posts: 1,094
Likes: 0
Received 0 Likes
on
0 Posts
I have a blitz dump valve fitted to my m/y94 wrx. They are single piston and mine also has idleing issues. The fault is cured when the original recuiculating dump valve is fitted.
Thread
Thread Starter
Forum
Replies
Last Post