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rev's up and down, engine stalling and dump valve hissing!!
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Old 28 Jul 2011, 08:01 PM   #1 (permalink)
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Question rev's up and down, engine stalling and dump valve hissing!!

Hey Folks

I have a '96 Sti with pro drive.
Only had it 2 mths and over the last 2 days the revs have dipped when the engine idles or i slow down at junctions etc. Has cut out a few times and with the steering locking it scary and not great at round abouts!!
Also noticed the dump vaLve is noisier than it has been.
I'm not technically minded but luv my car.....any help, in laymans terms would be much appreciated!
thanks in advance
Lou :0( Xx
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Old 28 Jul 2011, 08:11 PM   #2 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

Firstly.....Welcome

quick question,did the dump valve hissing start the same time as the low rev problem and cutting out??
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Old 28 Jul 2011, 08:20 PM   #3 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

Hmm, can't say for sure. It was really warm yesterday and while in a car park it stalled a few times, just put it down to me still not used to the car!!! Must say, i didn't hear as much hissing then as i have done today. It's fine while rev's are kept high but, not always possible when slowing down in traffic!
Sounds like it's gonna be expensive!
Any thoughts?
Lou X
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Old 28 Jul 2011, 08:25 PM   #4 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

i've got a funny feeling it's the dump valve causing the issue,can you tell me what make it is by any chance?
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Old 28 Jul 2011, 08:35 PM   #5 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

Eh, nope. I know i'm gonna sound completely thick now but, don't even know where it could be found. The manual isn't much help.
L :0( x
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Old 28 Jul 2011, 08:42 PM   #6 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

the manuals never give you then info you need
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Old 29 Jul 2011, 12:45 PM   #7 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

place your bets please:


Baileys?
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Old 29 Jul 2011, 01:58 PM   #8 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

Quote:
Originally Posted by jd View Post
place your bets please:


Baileys?
What odds you giving lol
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Old 29 Jul 2011, 02:52 PM   #9 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

Hi.

Quote:
Originally Posted by hooty1971 View Post

I have a '96 Sti with pro drive.
Only had it 2 mths and over the last 2 days the revs have dipped when the engine idles or i slow down at junctions etc. Has cut out a few times.
Have a look at the air-filter. "It could be clogged" Also look for a leak in the intake piping.
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Old 29 Jul 2011, 03:30 PM   #10 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

Quote:
Originally Posted by jd View Post
place your bets please:


Baileys?
already covered that bro,awaiting a reply
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Old 02 Aug 2011, 11:53 AM   #11 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

possibly maf, DV would cause issues on boost mainly, not comming down.

Def drive it steady and as little as possible till its look at and get it looked at asap
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Old 13 Nov 2011, 09:23 AM   #12 (permalink)
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Re: rev's up and down, engine stalling and dump valve hissing!!

why doesnt anyone post wat they figured out there problem to be????
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