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What things can cause overboost?

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Old 23 July 2003, 04:26 PM
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Omen
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Can folks please post reasons below so i can double check everything on my car!

I know about the oil in the solenoid & solenoid pipes but this isnt the cause.

The car is boosting right through to the fuel cut.

TIA

PS: Ive already exhausted the search facility!


[Edited by Omen - 7/23/2003 4:26:42 PM]
Old 23 July 2003, 04:57 PM
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jameswrx
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what mods do you have?

What boost do you get if you roll the throttle on slowly?

Is it just overboosting when you give it WOT?, or does the boost climb to overboost no matter how you apply throttle?
Old 23 July 2003, 06:56 PM
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Omen
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Its a bit hit and miss.

Everything was fine on the car for over a year with the mods ive got - full decat & K&N.

I came to fit a knocklink and moved the intercooler and its all happened since then. Ive double checked all the pipes for cracks etc...

If i floor it it boosts right round to 15psi then fuel cut. If i apply gently it tends to stick around the 12/13 mark but it hovers instead of being steady - then as i whack more on it increases.

It is dumping cos i can hear it through the induction kit when i lift off the accelerator.

Old 23 July 2003, 09:13 PM
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Omen
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Anyone? Im wearing a bald patch scratching my head here!
Old 23 July 2003, 10:09 PM
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dowser
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The fact it happened after you 'moved the intercooler' is related, I guess
Old 23 July 2003, 10:42 PM
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jameswrx
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yeah, agreed, re trace your steps mate.

Double check hoses to and from solenoid too
Old 25 July 2003, 04:49 PM
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Omen
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This i have done hence the reason i cant understand whats wrong. Ive double checked the lot, cleaned everything up and made sure there were no blockages, splits, cracks or loose jubilee clips!

Old 29 July 2003, 02:47 PM
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Leslie
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Maybe you had a slight leak before that you have now cured by checking the intercooler. A full decat will raise the boost and quite possibly beyond the fuel cut. It happened on mine when I improved the exhaust system right through.

Les

[Edited by Leslie - 7/29/2003 2:49:20 PM]
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