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08-04-2004, 02:01 AM | #1 |
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vaccum leak?
just picked my car up from the performance shop today and he said he thinks its a vaccum leak.....it sqeals pretty loud, is it possible to hear a vaccum leak i belive the leak is right there tween the lower and upper plenum........other than that she runs great......any help!!!
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08-04-2004, 07:39 AM | #2 |
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With the engine idling, spray some flammable brake cleaner in the area that you think is leaking. If the idle raises up, then you have a leak.
Andy
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88 coupe 91 LX NMRA Pure Street 5120 |
08-04-2004, 02:53 PM | #3 |
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I wouldn't spray brake fluid, it will kill your sensors in a heart beat. A little propane is best, or spray some water from a water bottle. when you mean squeal, how loud? a loud leak would indicate a big leak, which the car shouldn't run well if at all.
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08-04-2004, 03:24 PM | #4 |
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it sqeals pretty loud...i can hear it from inside of the car driving it.....but other than that it runs farely well....it seems to quiet a little when i accelerate....but at idle its farely loud...so you suggest water...and if the idle raises its a vaccum leak ?? thanx guys
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08-04-2004, 03:27 PM | #5 |
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if you spray water the car will stumble. if its pretty loud, sounds like it could be something else.. a leak that loud would cause the car to not run. thats me 2 cents.
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08-04-2004, 05:40 PM | #6 | |
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Quote:
Which sensors are you referring to that it will kill in a heartbeat? I must be getting real lucky everytime I do this. Andy
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88 coupe 91 LX NMRA Pure Street 5120 |
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08-04-2004, 05:42 PM | #7 |
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alright man thanx for the info.....il try something !!
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08-04-2004, 05:49 PM | #8 |
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Any brake related products are not to be burned in a motor. If you look on cans, and cleaners, you'll see it says, " safe for 02 sensors " like on fuel injector cleaner etc. etc.. there is a reason for that. it leaves residues that damage the sensors. unless its TBI cleaner, you should never burn them in a EFI car or anything with 02 sensors, or intake sensors etc. Thats a general rule with all cleaners. like you shouldn't use gum out on a efi car etc.
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08-04-2004, 08:41 PM | #9 |
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The amount of brake cleaner required to find a vacuum leak wont damage squat.
Andy
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88 coupe 91 LX NMRA Pure Street 5120 |
08-04-2004, 09:05 PM | #10 | |
dude5l
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Quote:
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Good luck! Brad R. 1992 L.X. 5.0 coupe MODS: A few little bolt ons New Best time ...11.60 @ 128 mph @ 2000+ ft altitude. Rice Haters Club member #39 Users rides #2542 |
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08-04-2004, 10:25 PM | #11 |
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you can spray it if you want, I would never spray a product down your intake, your just adding more variables to the mix down the road. My 2 cents.
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08-05-2004, 02:35 AM | #12 |
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Just spray some Natty Ice on the gasket area. If your car gags, it's a vacuum leak. If not, you haven't wasted much of anything to find out. End of discussion.
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Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco |
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