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scooby pulls back over 4000rpm
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Old 29 Feb 2008, 03:52 PM   #1 (permalink)
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scooby pulls back over 4000rpm

when u put your foot down over 4000rpm car pulls back and forward like a miss fire i have a bailey dump valve on it and when its cleaned his problem seems beter all tho still does it a bit dunno if this could be the problem, drives fine up until u put foot down over 4000rpm in any gear. More noticeable in 2nd and 3rd has any one any ideas is it worth putting original dump valve back on ?
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Old 29 Feb 2008, 06:51 PM   #2 (permalink)
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sounds a bit like fuel cut but not sure how the dump valve would cause that. sure someone on here will be able to shed a bit more light on it for ya mate


what year is the car?
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Old 29 Feb 2008, 07:07 PM   #3 (permalink)
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its a turbo 2000 euro import late 1999 (v) boosts fine up to 4000rpm then gets bit stuttery dunno ?
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Old 29 Feb 2008, 07:18 PM   #4 (permalink)
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defo sounds like fuel cut mate. did it on mine when a hose to the boost solenoid split. does it feel like a really harsh hesitation when it does it?
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Old 29 Feb 2008, 07:22 PM   #5 (permalink)
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well just stutters when u put your foot down doesnt feel like its boosting as it should or not as quick (whats fuel cut ?)
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Old 29 Feb 2008, 07:24 PM   #6 (permalink)
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its there to protect the motor if the turbo is overboosting
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Old 29 Feb 2008, 07:29 PM   #7 (permalink)
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how do i fix this problem got any ideas ?
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Old 29 Feb 2008, 07:35 PM   #8 (permalink)
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not sure to be honest. if its only a slight hesitation then it probably isnt fuel cut like i first thought. tit could be that the dump valve is sticking open slightly. there's quite a few good bods on here who'll be able to point ya in the right direction for puttin it right
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Old 29 Feb 2008, 07:46 PM   #9 (permalink)
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sounds like it could be dump valve cause when sprayed with wd40 it doesnt seem as bad maybe i should try putting old one back on see what happens thanks for advise anyway if u no of anyone put them on to this post cheers bud
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Old 29 Feb 2008, 07:49 PM   #10 (permalink)
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Hi.

It could be a faulty maf sensor.

Link: 1 http://www.subaru-impreza.org/bbs/sh...ad.php?t=10713

Link: 2 http://www.subaru-impreza.org/bbs/sh...ad.php?t=40167
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Old 29 Feb 2008, 07:56 PM   #11 (permalink)
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It would be a good idea to put the original dump valve back on.
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Old 29 Feb 2008, 08:28 PM   #12 (permalink)
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whats the maf sensor and where is it located ?
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Old 01 Mar 2008, 02:52 PM   #13 (permalink)
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put old dump valve back on seems bit more responsive but still seems to hesitate a bit over 4000rpm checked maf sensor took out when running and it stalled seemed ok any more ideas please help!
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Old 01 Mar 2008, 06:13 PM   #14 (permalink)
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Hi, I have just posted a similar issue with my UK Turbo 2000 in the engine bay section.
Sounds like the same symptoms with mine too, I can feel the boost pulsing on and off, not by a drastic amount but it does affect top end performance.

Lee
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Old 02 Mar 2008, 12:48 PM   #15 (permalink)
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Sticking boost solenoid?

Plug the green engine test connectors together if your car has tem and spray some cleaner through the solenoid while its clicking to clean it out. Might help.
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