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Unstable boost

Old Dec 28, 2006 | 09:40 PM
  #1  
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Default Unstable boost

Ok guys here's the problem. I seem to be suffering bad fluctuating boost. Car is MY02PPP 33,000 miles. Noticed during summer slight fluctuation but seems worse now colder weather is here. Car will boost up to 1.4bar then drop to 1.1 -1.2 then generally hunts around. Done the usual, cleaned boost solenoid/pipe work but still no joy. Anyone got any ideas

Cheers

Mark
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Old Dec 28, 2006 | 09:47 PM
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Do you run a dump valve

Last edited by octain; Dec 28, 2006 at 09:54 PM.
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Old Dec 28, 2006 | 09:57 PM
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No dump valve matey (i do have a removed resonator box though, but not sure if this is casuing the problems). Wondering whether i need to open up the restrictor a little

Mark
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Old Dec 28, 2006 | 10:09 PM
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Humm i had the same problem on my old mr2 turbo and it was boost leak through the dump valve , sorry i carnt be much help then

Mick
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Old Dec 28, 2006 | 10:12 PM
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i having the same problem (NY00 turbo) would a aftermarket dumpvalve cause this.
sorry for the thread hijack
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Old Dec 28, 2006 | 10:19 PM
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Have you had a remap?

Had mine done, then added a couple of bits and was overboosting. Orange light on and stuff.

Had it remapped again and, was told it was runing rich, never had a problem since then.

Hope this helps.


Alan MaC
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Old Dec 28, 2006 | 10:19 PM
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Originally Posted by octain
Humm i had the same problem on my old mr2 turbo and it was boost leak through the dump valve , sorry i carnt be much help then

Mick
Cheers Mick. I might take the dump/recirc valve off and give it a clean


Mark
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Old Dec 28, 2006 | 10:20 PM
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Originally Posted by Alan MaC
Have you had a remap?

Had mine done, then added a couple of bits and was overboosting. Orange light on and stuff.

Had it remapped again and, was told it was runing rich, never had a problem since then.

Hope this helps.


Alan MaC
No remap or warning lights Alan. Just the PPP ecu

Mark
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Old Dec 28, 2006 | 10:24 PM
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Sorry, it's a mystery then.

Sorry I couldn't help.

Good Luck.

Alan MaC
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Old Dec 28, 2006 | 10:31 PM
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Originally Posted by Alan MaC
Sorry, it's a mystery then.

Sorry I couldn't help.

Good Luck.

Alan MaC
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