quarterboy25
New Member
a mechanic recently told me that my car is idling low. (at 1000rpm) He said that I tune up could help this. Could that be a solution and are there any other suggestions?
low idling
- Thread starter quarterboy25
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ckinart
New Member
I'm not an expert, but I seem to recall sdpatt (THE expert) mentioning that the computer shoots for an idle speed of around 800 rpm (when properly taught). If your idle is smooth and consistent, and you're concerned about it being slightly high (which I can't see any real issue with), you can try resetting the idle program. You can search the forum for details on doing this. It's very easy. Do not adjust the idle set screw.
Oh, and unless the mechanic that told you your idle speed was high at 1000 rpm is a friend or something, I'd get a new mechanic.
<small>[ August 07, 2002, 12:46 PM: Message edited by: ckinart ]</small>
Oh, and unless the mechanic that told you your idle speed was high at 1000 rpm is a friend or something, I'd get a new mechanic.
<small>[ August 07, 2002, 12:46 PM: Message edited by: ckinart ]</small>
SHOfun 93
SHO Member
Don't quote me, but I think stock idle is 925-950 rpms.
twr
whoohoo
What does your mechanic think the rpm at idle should be?? Anywhere from 800 to 1000 rpm is fairly typical, since our high quality tach are about that accurate. BTW - the idle speed is not adjustable and (I doubt) a standard tune up would change it.
SHOfun 93
SHO Member
My advice is to disconnect the battery, let it sit a while, and turn the lights on to drain the computer's internal battery backup for the memory. Then reset the idle speed in the following:
reconnect the battery
start the car
put the car in Drive
turn on the lights
climate control to MAX AC
turn wheel side to side
make sure headlights are on
That will reset the idle speed and the computer should go back to what the stock setting is. Good luck!
reconnect the battery
start the car
put the car in Drive
turn on the lights
climate control to MAX AC
turn wheel side to side
make sure headlights are on
That will reset the idle speed and the computer should go back to what the stock setting is. Good luck!
sdpatt
Sr. SHO Engr.
Please don't quote me on things I haven't said. The only mechanical idle speed setting is done with the engine warm, IAC valve disconnected, SPOUT connector unplugged, CANP plugged and PCV plugged. Only then is the idle speed screw used to adjust the base idle speed to 770-830 rpm. This is rarely, if ever, required on our engines.
The EEC is solely responsible for the idle speed control through the IAC valve. The only thing you can do is to properly teach the EEC the loads that it must accommodate at idle. This is done by the idle program reset procedure which I have posted enough times in the Forum that you can search on. The thought of a "tune-up" changing the idle speed says it is time to get a new mechanic or ignore the one you have.
The SHO's tachometer is not a calibrated device. Mine reads from about 900 to 1100 at idle, depending upon the ambient temperature. I know it reads high as the rpm shown during state inspections or when hooked up ot a dyno reveal the true rpms to be a bit lower. The EEC will take care of your idle speed as long as you teach it the loads.
The EEC is solely responsible for the idle speed control through the IAC valve. The only thing you can do is to properly teach the EEC the loads that it must accommodate at idle. This is done by the idle program reset procedure which I have posted enough times in the Forum that you can search on. The thought of a "tune-up" changing the idle speed says it is time to get a new mechanic or ignore the one you have.
The SHO's tachometer is not a calibrated device. Mine reads from about 900 to 1100 at idle, depending upon the ambient temperature. I know it reads high as the rpm shown during state inspections or when hooked up ot a dyno reveal the true rpms to be a bit lower. The EEC will take care of your idle speed as long as you teach it the loads.
ckinart
New Member
Scott,
If I have misquoted you, I apologize. I just seem to remember you mentioning the figure of 800 rpm when this same question was asked some time ago. But I've been known to be wrong before. Next time I'll do my homework. thumbs_u
Corey
<small>[ August 08, 2002, 08:16 AM: Message edited by: ckinart ]</small>
If I have misquoted you, I apologize. I just seem to remember you mentioning the figure of 800 rpm when this same question was asked some time ago. But I've been known to be wrong before.
Next time I'll do my homework. thumbs_u Corey
<small>[ August 08, 2002, 08:16 AM: Message edited by: ckinart ]</small>
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