stock Blow off valve
#2
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It shouldn't idle, because the stock BOV opens at ~12inHg of vacuum, and your engine should idle at at least 15inHg.
Don't listen to anyone who suggests a check valve to get around this problem. Restricting its flow is hardly a good idea. If you're determined to open-vent the stock BOV, do this instead.
Don't listen to anyone who suggests a check valve to get around this problem. Restricting its flow is hardly a good idea. If you're determined to open-vent the stock BOV, do this instead.
Last edited by NZConvertible; 06-07-04 at 12:32 AM.
#3
thank you for the reply nzconvertible
but when I disconected my BOV just for a try
the car behaves the same as if stock (connected)
just the that air/fuel mixtures gets little richer
but when I disconected my BOV just for a try
the car behaves the same as if stock (connected)
just the that air/fuel mixtures gets little richer
#4
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It still idles at 750rpm? If it does, you must have low compression (causes weak idle vac) or a faulty BOV. Like I said, it should be open (and causing a huge vac leak) if the manifold vac is 12inHg or greater. What does your boost gauge read at idle?
#7
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nzconvertible my vacuum at idle is strange
when I start up the car it idles at at 16 inHg
but when driving for a good half hour or longer
it drops to like 13- 14 inHg
when I start up the car it idles at at 16 inHg
but when driving for a good half hour or longer
it drops to like 13- 14 inHg
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#8
NZ...I have my BOV vented to the atmosphere via a 1" check valve. It idles perfectly, but I want to know if there are some down sides to this besides running rich during shifts.
-Joe
-Joe
#9
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Originally posted by TurboII2NV
when I start up the car it idles at at 16 inHg but when driving for a good half hour or longer
it drops to like 13- 14 inHg
when I start up the car it idles at at 16 inHg but when driving for a good half hour or longer
it drops to like 13- 14 inHg
Originally posted by OverDriven
I have my BOV vented to the atmosphere via a 1" check valve. It idles perfectly, but I want to know if there are some down sides to this besides running rich during shifts.
I have my BOV vented to the atmosphere via a 1" check valve. It idles perfectly, but I want to know if there are some down sides to this besides running rich during shifts.
#11
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Sorry to hijack the thread, but I only see about 12HG of vacuum with my 650rpm idle i have set now. I have a new reman motor with about 750km on it, starts everytime, revs smoothly, but i have the check valve on the bov. do you think that this is the source of a vacuum leak?
ryan
ryan
#12
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hey guys, if i replace the stock bov with an aftermarket one that vents to the air, and put a plug where the stock bov returns back to the intake, this vac leak is obviously eliminated with a properly adjusted bov?
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