Help 964 cuts out at idle
09-08-2006, 02:13 PM
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Help 964 cuts out at idle
My 1990 C2 is cutting off at idle. The coils are fine and the idle control valve was changed. I hear a click right before it cuts out and there is a small round (about the size of a nickel) spot under the idle area and intake manifolds that turns a half a revolutionjust as it cuts out. Is there some kind of relay? Is this connected to something in the idle area? This little spot sure is hard to get to. Please help. TIA
09-08-2006, 03:17 PM
#2
Burning Brakes
this sounds like what my car did due to a misplugged spark plug wire......believe it or not. the round thing you describe is the resonance valve ....i think.....and is not the cause of the problem but rather a result of the problem. it sounds like you have a missfire/EMI issue causing your ECU to flip out. check your spark plug wires to make sure they are plugged in properly
09-08-2006, 04:54 PM
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Originally Posted by dougn
this sounds like what my car did due to a misplugged spark plug wire......believe it or not. the round thing you describe is the resonance valve ....i think.....and is not the cause of the problem but rather a result of the problem. it sounds like you have a missfire/EMI issue causing your ECU to flip out. check your spark plug wires to make sure they are plugged in properly
09-08-2006, 05:19 PM
#6
Burning Brakes
the click (in my experience) was the resonance valve. something was happening with pressure pulses such that the valve would wildly slam open and shut when the engine was acting up. it was weird....it would idle fine for a few seconds then it was like the ignition and or fuel was shut off completely.....and it would die. it would sometimes "turn back on" and catch itself only to die moments later. if you reach behind and put your hand on the rod that operates the resonance valve you can verify this.
in my case, it was nothing to do with the valve however
in my case, it was nothing to do with the valve however
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09-09-2006, 10:13 AM
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Oh, A possibility. If the plug wires are somehow bad??? Would that do it? I watched them in the dark and there was some very faint arcing close to the distributers but only very little.. TIA
09-09-2006, 01:18 PM
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Hi,
I had what seems to be the same problem as you are having and it also happened overnight. At first, I thought it was the idle stabelising microswitch but it turned out to be the arcing ignition coil (and that was on a newly replaced coil too). I hear a lot of ticks (not the valves) in the coil area and checking in the dark confirms the arcing. Good luck. Andy
I had what seems to be the same problem as you are having and it also happened overnight. At first, I thought it was the idle stabelising microswitch but it turned out to be the arcing ignition coil (and that was on a newly replaced coil too). I hear a lot of ticks (not the valves) in the coil area and checking in the dark confirms the arcing. Good luck. Andy
09-10-2006, 12:10 AM
#10
Burning Brakes
yes any arcing is bad....and can cause your electronics to freak out.
