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Impreza Lumpy Idle
Topic Started: Jun 5 2008, 02:16 PM (270 Views)
davidgoodwinuk
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1993 WRX
[ *  *  *  * ]
hi guys, i have another small porblem.

the car started running lumpy so i did an ecu check and it came up with (45) pressure sensor - pressure exchange sensor solenoid.

the car will tick over normally then for aroud 20 seconds then drop to 500rpm for around 20 seconds and then it does it all over again.

i removed the pipes from the red thing on top of the boost solenoid and sprayed brake cleaner and it works for about 10 seconds and then goes lumpy again.

Please Help david.
[GK-customfield]David Goodwin[customfield-GK]
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davidgoodwinuk
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1993 WRX
[ *  *  *  * ]
i should add that when i start the car from cold it runs fine for around 10 seconds then the revs drop to belowe 500rpm then picks up then drops and so on.

Thanks David
[GK-customfield]David Goodwin[customfield-GK]
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myblackwrx
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Doesn't have a home to go to!
[ *  *  *  *  * ]
The black round bit on the boost solenoid is the pressure exchange sensor i think.
[GK-customfield]Paul[customfield-GK]
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davidgoodwinuk
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1993 WRX
[ *  *  *  * ]
is this it

Posted Image
[GK-customfield]David Goodwin[customfield-GK]
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myblackwrx
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Doesn't have a home to go to!
[ *  *  *  *  * ]
yep that black cylinder can be turned but never having had the problem can't suggest a cure.
[GK-customfield]Paul[customfield-GK]
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rob73
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hello
[ *  *  *  *  * ]
the black cylinder will pull off quiet easily. it isnt tight and looks like a breather of some kind so maybe check it isnt clogged up with cack. other than that i aint got a pot of glue mate.







1995 wrx wagon the cleanest around!!!
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davidgoodwinuk
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1993 WRX
[ *  *  *  * ]
i am not getting fuel cut just really lumpy tick over and when i de accelerate say down hill it is poping and farting all the time.

i noticed last night that it is causing the boost gauge to jump all over the place on tick over, normaly on tick over it sits steady at around -0.75bar but now it jumping between -0.2bar - -0.4bar but as soon as i touch the throttle it drops back to -0.75 bar and stops messing around
[GK-customfield]David Goodwin[customfield-GK]
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davidgoodwinuk
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1993 WRX
[ *  *  *  * ]
i filled up with tesco 99, then my last fill was with texaco super.

would this cause any problems. or could it be something els
[GK-customfield]David Goodwin[customfield-GK]
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myblackwrx
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Doesn't have a home to go to!
[ *  *  *  *  * ]
Don't think it would help as the early ecus can retard timing easily but not advance the timing easily.

[GK-customfield]Paul[customfield-GK]
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davidgoodwinuk
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1993 WRX
[ *  *  *  * ]
i should add that i am running no DV, but havnt been for around 3 weeks now so i dont think it would be that.
[GK-customfield]David Goodwin[customfield-GK]
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davidgoodwinuk
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1993 WRX
[ *  *  *  * ]
take a look at the video, apart from me pressing the throttle down half way throught the vid its the car doing the rest.

Any ideas


Sti running lumpy



[GK-customfield]David Goodwin[customfield-GK]
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davidgoodwinuk
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1993 WRX
[ *  *  *  * ]
all sorted, there was a huge split in the inlet pipe, (tit).

thanks
[GK-customfield]David Goodwin[customfield-GK]
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