RE: Poppin noise WTF
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RE: Poppin noise WTF - 2/26/2008 7:02:14 PM
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z28pete
Posts: 5575
Joined: 8/7/2005
Status: online
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1)Your engine uses two (2) crank position sensors. 24X (high res) and 3X (low res)
The 24X sensor behind the front damper stabilizes spark timing from idle to around 2000 RPM. If this sensor is bad the idle speed will be affected, the spark control will default to the 3X sensor, but the MIL will not be lit. If the scanner said the High Res Sensor is bad, you need to fix the sensor problem in order to make the engine idle properly.
2)The 3X sensor midway on the passenger side of the block provided the reference signals to the ignition control module, and if this sensor is bad the car will not start.
3) Exhaust leaks will cause noise, but will not cause misfires.
4) Any vacuum leak will affect idle speed.
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Pete
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RE: Poppin noise WTF - 2/26/2008 7:28:35 PM
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nsbjim
Posts: 30
Joined: 5/1/2007
Status: offline
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I might be off, Sounds somewhat what I have experienced, it was ticking sound though that I would hear. Turned out to be a bad plug wire that the boot of it was barly touching the plug it self. When the car was at idle I would put my hand on each wire and think it was the number 5, which ever one is closet to the fire wall on the driver side and i could feel the ticking from the wire. snugged up the wire to the plug and the ticking noise stopped. Its a easy check if you haven't already.
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NSBJIM
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RE: Poppin noise WTF - 2/27/2008 4:13:16 AM
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02StanGT
Posts: 3010
Joined: 9/18/2005
From: Ft. Worth, TX
Status: offline
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I thought you said you had a code for crank sensor going bad? Maybe I misunderstood. Not sure how the EGR is set up on a 3.4. I've seen it a couple ways. On my mustang the EGR was mounted directly to the intake, and on my Camaro a pipe runs from the exhaust manifold to the EGR valve then another pipe to the intake. If it has pipes on either side, it depends on what side, as to if it can cause the high idle. Intake side, yes. Exhaust side, I doubt it. If your hole is on the exhaust side, that could be the source of your "popping" sound.
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RE: Poppin noise WTF - 2/27/2008 9:31:47 AM
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jdog
Posts: 11
Joined: 12/5/2007
Status: offline
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make sure u check to see if your spark plug wires are getting spark to your coil u might have a bad one of those that happened to me about 5 months ago
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