vacuum leaks
02-02-2004, 01:00 PM
#1
Drifting
Thread Starter
vacuum leaks
what do you guys use to correct vacuum leaks? recently i saw a post that stated the hard lines being loose in a rubber elbow, but cant find the post, or any other answers in the search. is there maybe a glue to use? one guy said he went to napa and bought new elbows and lines, is this the only way? i have the 1200 idle that the first guy i mentioned fixxed. and i have the shudder that drops the idle to 800 when the car warms up.
02-02-2004, 01:26 PM
#3
Drifting
Thread Starter
tps? if so.....its new and thats what i thought. when i asked before, i was told it is not the tps. but i swore i saw in clarks garage, but cant seem to access all of the pages there.
02-02-2004, 01:32 PM
#4
Race Car
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Vacuum leaks in the large hose that runs to and from the idle valve. The early valve is a heated bi-metalic spring that closes off the bypass air to the intake.
The shutter is from an improperly set TPS or a bad DME program. Think www.frwilk.com has a chip that will correct this.
The shutter is from an improperly set TPS or a bad DME program. Think www.frwilk.com has a chip that will correct this.
02-02-2004, 01:34 PM
#5
Drifting
Thread Starter
i thought that chip was only to correct the revs from dipping down when letting off the throttle.............. what mine does is: start car, idles high, warms up, starts to wander from 1200 to 800 dips down and sounds like it wants to shut off. so the valve you are talking about would be in the iac? or aav? not sure what you guys call the cold start.
02-02-2004, 07:41 PM
#7
Nerd Herder
Rennlist Member
Rennlist Member
Not to hijack.. but with the extreme cold weather my idle has been climing to 2100 rpm after initial warmup.. and yeas, i have checked all my vacuum lines..
BTW- Sid V.. my vacuum lines suck.
BTW- Sid V.. my vacuum lines suck.
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02-02-2004, 08:38 PM
#9
Burning Brakes
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Vacuum leaks can be located by spraying carb cleaner around suspect areas and listening for a change in speed from the engine as it injests extra hydrocarbons.
I am chasing too rich cold idle and rich operating mixture. I am starting with Ice Sharks neg cable kit to ensure good engine grounds before I start replacing sensors and ISV.
I am chasing too rich cold idle and rich operating mixture. I am starting with Ice Sharks neg cable kit to ensure good engine grounds before I start replacing sensors and ISV.
02-02-2004, 11:40 PM
#11
Burning Brakes
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Originally posted by kennycoulter
isv?
isv?
"Anyone know if the Idle Stabilizer can be tested"
or do a search on ISV
If you were to find a leak with the carb cleaner method the repair would depend on what and where you found the problem.
02-03-2004, 05:35 AM
#13
Intermediate
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You might be able to snake it out by taking the throttle body, air intake bellows and related hoses. Hard to reach the hose clamps and undo the 10mm heads that hold the valve on. You can test it for leaking by pinching the vacuum line between the valve and intake manifold. If the rpm drops down to normal 750 from ???? at full engine operating temp then the valve is leaking. Checking for vac leaks, I use propane to sniff around vacuum hoses and connections, if the O2 values start going up or the engine stumbles or rises in engine rpm then you can suspect a vac leak close by.