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Does your throttle contol valve and intake manifold hiss?

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Old 01-24-07, 08:22 PM
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MangoMan
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Default Does your throttle contol valve and intake manifold hiss?

If I listen to my car where the two pipes from the intake go into the idle control and intake manifold and listen I can hear a hiss sound. Does anyone else have this?
Old 01-25-07, 07:48 AM
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MangoMan
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I changed the fuel filter and sparkplugs on my car and I still have misfires but my engine light won't come on! So there are no codes to pull from my understanding. I need to know which cylinder is misfiring! It must be a bad injector or coil pack. Maybe a vacum leak or the egr valve is bad but would that cause misfires like 3 in a row and then nothing and then 3 more?
Old 01-26-07, 03:46 PM
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migitymark
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vacuum leak. take a propane torch & spray the unlit gas at the suspected leak. it will suck in the flammable gas & rev up a little & smooth out.
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