an idle problem fix........(not obvious)
an idle problem fix........(not obvious)
make a long story short...(not really , I guess)
had surging at idle at first, then car wouldn`t idle at all, had to stay on the gas to keep car running
checked the usual culprits ( TPS, BAC, connections, etc.,).
finally disconnected the BAC, upped the idle so it wouldn`t stall.
Noticed when car was in gear, clutch disengaged, rpms would drop by 200-300rpm; also when revving the engine, as the rpms dropped , at around 1200 rpm the engine run incredibly rough unless I took it out of gear.
traced the problem to a bad clutch switch. Replaced switch and no problems anymore.
Comments??
had surging at idle at first, then car wouldn`t idle at all, had to stay on the gas to keep car running
checked the usual culprits ( TPS, BAC, connections, etc.,).
finally disconnected the BAC, upped the idle so it wouldn`t stall.
Noticed when car was in gear, clutch disengaged, rpms would drop by 200-300rpm; also when revving the engine, as the rpms dropped , at around 1200 rpm the engine run incredibly rough unless I took it out of gear.
traced the problem to a bad clutch switch. Replaced switch and no problems anymore.
Comments??
Sure, been there, done that... 
Remove the clutch switch totally, and the idle never drops below 1100RPM or so.  This happens when the piece-of-**** plastic stopper on the clutch pedal breaks and allows the switch to slip into the now vacant hole.  This is obvious when you hear a loud click under the dash everytime to lift off the clutch pedal.  Although not identical to your problem, it's pretty similar.
Sorry, dunno why this is so, but I guess the ECU keeps track of the clutch switch and somehow bumps up idle for some screwed up reason...
-Ted

Remove the clutch switch totally, and the idle never drops below 1100RPM or so.  This happens when the piece-of-**** plastic stopper on the clutch pedal breaks and allows the switch to slip into the now vacant hole.  This is obvious when you hear a loud click under the dash everytime to lift off the clutch pedal.  Although not identical to your problem, it's pretty similar.
Sorry, dunno why this is so, but I guess the ECU keeps track of the clutch switch and somehow bumps up idle for some screwed up reason...
-Ted
ur talking about the button that has to be depressed for the car to start? my frend had a 87 sport, taped the button down so he cud jus start it up with out pressing the clutch. seem to idle and drive ok.
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I posted this probably 6 months ago
