Check Engine Light Vacuum Leak -

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Check Engine Light Vacuum Leak

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Old 07-05-2007, 09:39 AM
bigbill7501 bigbill7501 is offline
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Join Date: Apr 2006
Vehicle: 2001 dodge ram 1500
Posts: 35
Default Check Engine Light Vacuum Leak

The check engine light in my truck comes on and says there is a vacuum leak i trace down the cracked peice of line by the charcol canister. And fix it reset the battery and the light is gone and then out of no where its back on what is the best way to find all of the leaks.

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Old 07-05-2007, 03:52 PM
WayneC WayneC is offline
Join Date: May 2007
Location: Clearwater, FL
Posts: 600
Default RE: Check Engine Light Vacuum Leak

Replace all of the hoses!
Sorry, I couldn't resist
What year, engine. Do you have the LDP? What's the new code(s)?
2001 1500 Quad Cab; Auto, 5.2

Still Playin' With Trucks!
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Old 07-05-2007, 05:04 PM
mopowar mopowar is offline
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Join Date: Feb 2006
Location: Richmond, Va
Posts: 1,567
Default RE: Check Engine Light Vacuum Leak

Best way is to get a handheldvacuum pump with a gauge on it. Basically you start at the manifold and throttle body, unplug a line, pump it up to 20psi, and see if it holds. Go to the next tee, disconnect the two lines going away, and repeat the process on them. You can also use a vacuum gauge with the motor running in much the same way. Its just harder to trace out the exact location of the leak because you have to work backwards.

You can check manifold leaks with a propane torch. Point the unlit stream of propane around the edges of the manifold. When the rpm's jump, the area you are pointing at is the culprit.
2009 Dodge Ram QC Sport 4x4- Diablo/ Mike Wilson tuned, Magnaflow/Mufflex, K&N drop-in
Mid-Life crisis Truck: 2000 Dodge Ram- 360-4.10's-Hughes heads-2.02's/1.62's-M1-Hs 1.6 adj. rr's, Krc 210x cam-Ram Air Box-MSD ignition-Long Tube Headers-SCT tuner-2500 stall
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