Vacum trouble
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From: Milwaukee, WI
Vacum trouble Is there a trouble code for a vacum leak? Or how is the best way to tell if you have one? All I have to check it is a Predator but I have a new HPtuners tune installed so I gotta be careful what I use the predator for.
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Joined: Nov 2001
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From: Lake Zurich, IL
watch your LTRIMs, if they're really positive and seems like no matter what you do you can't get them to go down to 0, then you prolly have a vacuum leak (letting unmetered air into the engine)
you could use some flammable spray ... spray it around the intake manifold and anywhere there could be a leak (do it sparingly as it's prolly not that great for some of the pl.astic pieces) ... if your idle goes goofy after you spray then that's the spot you've gotta vacuum leak
you could use some flammable spray ... spray it around the intake manifold and anywhere there could be a leak (do it sparingly as it's prolly not that great for some of the pl.astic pieces) ... if your idle goes goofy after you spray then that's the spot you've gotta vacuum leak
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
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From: Lake Zurich, IL
shouldn't be a flame... as it will be getting sucked in, but the combustion chamber is still sealed when the flame occurs 
Basically you're looking for changes in idle characteristics... if it's idling at 900RPM, if you add more fuel you should notice the car surge a lil bit when you find the vacuum leak
Basically you're looking for changes in idle characteristics... if it's idling at 900RPM, if you add more fuel you should notice the car surge a lil bit when you find the vacuum leak
