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Another boost problem
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Old 23 Mar 2007, 05:49 PM   #1 (permalink)
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Another boost problem

96 GF8 wagon wrx import.

Was running perfect, always starts first time but.....

Developed a boost problem.

In 2nd, 3rd, 4th and sometimes 5th there is a violent reaction to pressing the throttle (i.e all power is lost and its akin to hitting the brakes) it'll spool and accelerate as it should then suddenly hits the problem (not at a specific rev neither), then it clears and boosts again (or more likely I change gear)

No other problems at all.

From what I've tried to find out it could be the plugs or coils packs but the reaction doesn't seem to be the loss of one cylinder seems like they all go at the same time.

Can it be just a plug?

thanks
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Old 23 Mar 2007, 05:55 PM   #2 (permalink)
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Could it be overboost ??? Check all your pipework, may have a split or loose pipe ...
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Old 23 Mar 2007, 05:57 PM   #3 (permalink)
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Another thought. Have you recently topped up or had an oil change.... May have oil contamination in the boost pipes and solenoid. This can cause problems with boost.
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Old 23 Mar 2007, 06:01 PM   #4 (permalink)
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Thanks Pete,

I'll be looking around the engine in the morning for loose pipes.

The car was serviced a month ago and has ran fine since up until the last couple of days. I'll check the air box/fuel filer areas as I know these were replaced cos I saw the old ones.

Just seems a bit odd to loose all power in an instant then get it back after a second nearly being put through the windscreen in the process.

I do know the garage once put 95 ron in though but I diluted it down straight away.

Thanks again
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Old 23 Mar 2007, 07:15 PM   #5 (permalink)
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worth get it connected up to a fault logger to see if its kicking out any fault codes on the sensors, failing that might just need the ecu reset
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