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Blow Off Problems

33SUM

By 33SUM,
in Engines & Forced Induction

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33SUM Enthusiast

33SUM

Posted
Posted

bought a dodgy blow off valve ( first ebay experience ) when i fit it the car was having all sorts of idling problems major power surges and just plain no power at all... took it off after the mechanics told me it was the bov not working properly...

since putting the stock bov back on i'm still getting idling problems when starting the car up (when cold) and it takes a minute to be able to free rev the engine because it sort of coffs and sputtlers.... also when driving the bov is much louder and it sounds like theres a a/m bov on there, it's releasing between gears and when coming off boost...

my mechanic checked it out and told me it's probably a computer problem and to see an auto electrician but that still doesn't explain the bov being so noisy, does it???

please help i know very little but don't wanna pay any more money to not get it fixed.....

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33SUM Enthusiast

33SUM

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yeah it's connected properly weve tested it with that spray on leak findind stuff..

it's clamped an all but i personally think its leaking some were as well... but where???

cant follow the bov return pipe down far enough to see without pulling all the smic pipes out the mech's tested as far down as they could see but no good... could it be that the bov is releasing more down the return pipe now and as a result making more noise??

when driving it's only going bout 80% power but the turbo sounds like it's winding up much louder than before...

a big lesson has been learned bout buying cheap car parts....

mad082 Grand Master

mad082

Posted
Posted

was there a restrictor in the piping when you first took the stock bov off? i have heard of a few people that have found a restrictor plate plugging up part of the plumback pipe directly after the bov. if there was and that is no longer there then that is the extra noise problem.

DREW32 Enthusiast

DREW32

Posted
Posted
oh well i'll soon find out off to the auto electrician.. will post results thanks guys

could you tell me what sort of bov you bought as i just bought one off ebay and when it arrived didnt look like a fair dinkum one it is a supposedly hybrid supersonic bov and not to sure to fit it now or not

TTT Grand Master

TTT

Posted
Posted

auto electrician?

What a waste.

You had sparks plugs in there when you had the crap bov which caused overfueling and coughing and spluttering.

They are fouled.

Take them out, buy a new set of spark plugs (NGK BCPR6ES-8 (if they don’t have the -8’s you can also use the -11’s but will have to re-gap them)), put them in and it should be all good.

Cost you about $4 each plug.

33SUM Enthusiast

33SUM

Posted
  • Author
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well there was no computer problem, just a loose hose connection coming off the turbo...

i thought it was leaking and i was right and two different mechanics couldn't figure it out.. the auto electrician did...

thanks for the suggestions guys

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