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Can A Bov Get Blocked Up With Dirt, Etc

lows_13

By lows_13,
in Engines & Forced Induction

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lows_13 Mentor

lows_13

Posted
Posted

I think my atmo BOV might be causing the car to stall every now and then due to it leaking,

is it possible for the BOV to get dirt, etc in it that will cause it to close the valve

slower after blowing off pressure during a gear change.

I've tried to tighten the adjustment screw but that doesn't seem to make a difference.

I've taken the BOV off and tested the spring pressure by pushing on it and it has quite a

bit off tension behind it.

LANFOH Experienced

LANFOH

Posted
Posted

A BOV can seize after a while due to all the carbon and shit that gets in it, but I dont think this will cause your car to stall. Your more likely to stall if your BOV is venting to atmosphere and tricking your AFM.

Plumb back your BOV, your car will run smoother with no stalls.

lows_13 Mentor

lows_13

Posted
  • Author
Posted

Happens even now and then after taken it out of gear, then braking for a red light, etc.

I was under the bonnet the other day and rev'd the car up a few times to see if the BOV

was closing properly. It didn't open and close straight away, it opened ok but closed in pulses instead

of one continuous movement.

nemz Experienced

nemz

Posted
Posted

it opened ok but closed in pulses instead

of one continuous movement.

??

do you have a type 2 turbo smart?

also check the size of the houses connected to the blow off..

the line from the blow off to the turbo should have a small hole, maybe try valving it or whatever...

but yeh thats all i can think of!

grim32 Community Regular

grim32

Posted
Posted
Its an atmo BOV, all plumback lines have been blocked up.

How is having it to tight making it pulse?

Because the spring tension is too much for the boost to release in one go. Back the adjustment off a turn or two and it wont pulse, but then if it leaks on boost you may have to tighten it a touch

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