Larry, I appreciate the response. I had checked all exhaust connections and nothing found. If you can imagine taking a hammer and hitting a 1 inch steel pipe, that is what the sound is similar to. A constant rapping, or rat tat tat, that doesnt stop unless I shut off the engine. When the engine is off and the clutch is in, there is no noise. So I ruled out rear end issues and parking brake hang ups etc.... I first thought I had lost a valve but the drive train/valve train is solid and quiet. When the noise happens, I can feel the pulse of the "tat tats" on the fuel lines laying on top of the rear frame where it arches over the rear axle area. My assumption is that the fuel pump may be failing inside. Just not 100 percent on that theory. It drives me nuts at a stop as you can hear it loud and clear. As soon as the rpms go up, the sound disappears or at least goes faint and absorbs itself within the roar of the exhaust and road noise. Jon
Joel Adams
C3VR Lifetime Member #56
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
possibly the grounding of the motor itself?
Hi, electrical issues are a pain in the arss. Anyway, I would agree with the other poster about the ground issue with the window motor. Maybe get a replacement motor and trial run it and see if the issue develops again. There maybe something internally with the motor that acts up under certain conditions. Good luck. Jon
possibly the grounding of the motor itself?
Assuming you have tested the switch for weak contacts and checked the wiring for any breaks, then it would default to the motor assembly. I have seen motors with "weak spots" or in other words, internally something is going out or has a weakness. I have even seen a new replacement motor work fine on bench testing then upon installation into the door cavity and after hooking up the regulator and window it went weak and failed. I figured it was the weight and the force of resistance after hooking up the motor. I installed another replacement and it worked fine and sent the faulty motor in for warranty. Anyway,I would still just opt to put a new motor in and see what happens. Process of elimination. Of course it could be the dreaded electrical gremlins. Jon