Questions & Answers for: GMC vacuum leak

Vacuum line leak 1989 gmc suburban 2500 7.4 l 454 3/4 ton 2 w drive There is a switch that is activated by the brake pedal and there is a vacuum line attached to it. When the brake pedal is pushed the

...vacuum leak. Look for cracked or disconnected vacuum hose. I don't know what that code is specifically, but the first thing I'd check for is a vacuum leak. So check all the little hoses running from ...

...Vacuum leak at intake manifold and vacuum hose. Bad Idle Air Control Motor (IAC) Low compression (170 psi + is OK) Start cleaning and repair these trouble spots and see is there any improvement. ==== ...

vacuum leak. A large vacuum leak will do just what you described. I would listen for a leak first if you cant hear it and locate it then i would spray carb cleaner around the vacuum lines. If you have

...vacuum leak usually at the vacuum lines to the EVAP canister, or a loose fuel cap could have caused that DTC (Data Trouble Code). Check the vacuum hoses very carefully for any cracks or broken lines ...

...vacuum leak will act like a fouled spark plug, or even bad gas... but your sensors will do the same thing.but i would start by looking for a vacuum leak it would be the least expensive starting

...vacuum leak. If the vehicle is over 15 years old, replace all under-hood vacuum hoses. You can find a vacuum leak by spraying carburetor cleaner on all vacuum connections with the engine running. The ...

...vacuum leak.Check all vacuum hoses for cracks or burns then check for vacuum leak around the intake manifold could be a bad intake gasket.If there is no vacuum leaks then check your fuel pressure it ...

...vacuum leak when brake pedal is pushed you mean you hear it WHEN you push pedal ? power booster could be going bad ! check allvacuum lines, sound good ? any trouble with brakes ? hard pedal ? tighten ...

...vacuum leak. How do I fix it. The following is from the "Check Engine light" diagnostic: Cylinder misfire detected #2 cylinder. Ignition Coil Vacuum leak Large Vacuum Leak what was the diagnosis-- ...