Just lost 5psi boost pressure!!!!
30 May 2002, 01:33 PM
#1
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Just been out in the Scoob (MY95 UK) which was peaking at 16psi & is all of a sudden peaking at 11psi 
The only thing i've done since yestersday is take out a coil pack & put it back again but this shouldn't matter.
Any suggestions what I should look for?
Cheers
MAFFA
The only thing i've done since yestersday is take out a coil pack & put it back again but this shouldn't matter.Any suggestions what I should look for?
Cheers
MAFFA
30 May 2002, 01:41 PM
#2
Sounds like you have hit fuel cut, when you do it reduces boost, if a restart doesn't cure it, It could be the boost solenoid sticking & requireing a clean. I believe MY95 hit fuel cut around the 15 Psi mark, it might be worth knocking the boost back slightly or investing in a Fuel cut defenser.
Dean
Dean
30 May 2002, 01:59 PM
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It used to overboost occasionally in the winter weather when it used to hit 16psi & up until today it wasn't doing it at all at 15psi in the warmer air. It doesn't drop suddenly it just doesn't make it over 11psi & it feels really sluggish (For a scoob)
30 May 2002, 03:21 PM
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Maffa,
Sounds to me like the solenoid isn't bleeding off any air and so you're only getting about 0.75 bar boost which is what my Evo hits without any bleed from the line to the actuator.
I'd suggest you remove the solenoid and clean it and the line to it and see if it clears up.
Andy
Sounds to me like the solenoid isn't bleeding off any air and so you're only getting about 0.75 bar boost which is what my Evo hits without any bleed from the line to the actuator.
I'd suggest you remove the solenoid and clean it and the line to it and see if it clears up.
Andy
30 May 2002, 03:31 PM
#6
yes it sounds like the boost solenoid, Buy yourself a tin of spray brake cleaner (local motor acessorie shop about 2 quid) & remove the vacuum pipes Etc from the solenoid, give the solenoid & pipes a good dose of the cleaner, plug them all back in quickly & go for a thrash making sure your using boost. You may need to repeat this a couple of times but should work. Does the trick on mine.
30 May 2002, 04:25 PM
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The problem i had with my scoob when i hit 16psi and then it dropped off to 11psi (at around 4.5krpm) was cr@p in the wastegate pipe.
Had that cleaned and the power went up nicely
now its not really noticable though unless your doing over 100mph as it felt sluggish up there (and 224bhp proved it ) but you could try that, i think its probably the most likely problem.
Tony
Had that cleaned and the power went up nicely
now its not really noticable though unless your doing over 100mph as it felt sluggish up there (and 224bhp proved it ) but you could try that, i think its probably the most likely problem.Tony
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30 May 2002, 05:07 PM
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This'll be the third time i've cleaned it in a year Mind you I had it serviced about 1000 miles ago. Might check the oil level.
Mind you I had it serviced about 1000 miles ago. Might check the oil level.
30 May 2002, 10:35 PM
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Cheers Dan. I was gonna try that first before I clean the solenoid. Driving home from work it peaked at 12psi so it's a little better 
30 May 2002, 10:50 PM
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Blue screened 
What's that? I'll try the ECU reset & if that doesn't work i'll clean the wastegate again 
What's that? I'll try the ECU reset & if that doesn't work i'll clean the wastegate again
31 May 2002, 10:23 AM
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So what's the latest Matt? back to 16psi???
I'm tempted to clean my pipes out (no smriking at the back!
) as it might help me with my lowly 225bhp.
I'm tempted to clean my pipes out (no smriking at the back!
) as it might help me with my lowly 225bhp.
31 May 2002, 11:51 AM
#18
Maffa,
After talking to you yesterday about boost solenoid cleaning Etc, Mine is now doing exactly the same, I have reset the Ecu & it worked fine for half a day 16psi achieved but now back to 10 psi. This problem must be transmitted through the internet. Have you sorted yours Then ?.
Dean
After talking to you yesterday about boost solenoid cleaning Etc, Mine is now doing exactly the same, I have reset the Ecu & it worked fine for half a day 16psi achieved but now back to 10 psi. This problem must be transmitted through the internet. Have you sorted yours Then ?.
Dean
31 May 2002, 03:59 PM
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Do you get any fault codes Dean - plug together the underdash connectors reading the CEL? http://www.ravensblade-impreza.com/m...agnosisegi.pdf
01 June 2002, 11:57 PM
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Mines still running at around 11/12psi after cleaning the solenoid & resetting the ECU. Dunno whether it could be something to do with the warmer weather
Either that or i've got a leak somewhere
Either that or i've got a leak somewhere
04 June 2002, 05:36 PM
#23
\m/ ^_^ \m/
i had this problem, turned out my boost gauge had broke
might not be the solution but i borrowed someone elses boost gauge and it was reading fine, problem is you said it felt slugish
kev
might not be the solution but i borrowed someone elses boost gauge and it was reading fine, problem is you said it felt slugish
kev
05 June 2002, 12:09 AM
#24
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Feels quicker now even though the boost guage is reading 11/12psi.
Maybe time for the rollers again. We'll soon see if the 297BHP drops
Maybe time for the rollers again. We'll soon see if the 297BHP drops
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