2004 GMC Envoy "check vacuum leaks" Questions

...Check all vacuum lines and fittings attached to the intake manifold, valve covers(pcv valve), and be sure to check for a vacuum fitting on top of the intake just behind the throttle body. Does it fit ...

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 especially the vacuum hoses to the EVAP canister

...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-- ...

...like a vacuum problem. Do you have a seemingly hard brake pedal? If you do chances are your brake booster is leaking vacuum. If not check your vacuum lines. Your heater system is controlled by

...vacuum, plug, coil, etc. Check the distributor cap to see if it is in good condition. Listen for sounds of a vacuum leak.It could be a number of things that will only cause major problems for you out ...

I just replaced a map sensor on my 04 GMC Envoy 4.2. It won't idle and shuts off help please Check for proper fuel pressure and vacuum leak Any codes that pop up? Intake leak codes?

...find vacuum lines from engine to firewall. Please help. Air does blow to the rear console. check you air flow position sensor should be behind radio that an electronic unit vacuum line wont ...

vacuum leak. Make sure to check the hoses running off the fuel tank and the fill hose too. Take a flashlight and pinch the hoses the whole way because a crack will not always stick out to the bare eye

...check valves. When the AIR system is inactive the shut off valves prevent air flow in either direction. Possible causes - Faulty Vacuum hoses damaged - Faulty Air Pump inoperative - Air bypass ...

...vacuum leak 2.leaking egr or plugged pcv valve 3.ignition components damp or damaged 4.faulty or incorrectly gapped spark plugs 5.faulty plug wires 6.faulty emmission components 7.air filtr clogged ...