I would like to see what could be causing her to idle high. It idles around 1200 to 1400? She will also randomly misfire every once in a while. What could cause this?
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04-11-2014
I would like to see what could be causing her to idle high. It idles around 1200 to 1400? She will also randomly misfire every once in a while. What could cause this?
04-11-2014
I'm sure someone more experienced can and will chime in, but mass air flow, throttle position sensor, vacuum leak. Could probably use a tune up if you haven't already done plugs and wires
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04-11-2014
I had the same problem. Try this. Turn the key on and press the gas pedal to the floor hold it for 3 sec, let off, pump it to the floor 5 times in 7 sec let off Turn key off then start it . See if this fixes the high idle. If not follow Toms suggestions.
04-11-2014
More info is really needed. You wouldnt go to a shop and say what you said, because they'd just look at you with a dumb look because they have no idea what you are talking about and what you drive.
What do you drive?
Any recent repairs/maintence done?
Modded or stock?
What else do we need to know about the vehicle to help?
What have you tried?
04-11-2014
I drive a 1999 Grand Prix with a cammed L67. I bought plugs, wires, oil, and an oil filter but need a day off to install. The car is mildly modded. I havent tried anything tofix the issue because it happened on my way to work today.
04-11-2014
What cam is in it?
04-11-2014
NIC cam
04-11-2014
Is that some kind of idle re-learn?Originally Posted by lewis1952
04-12-2014
yes it fixed my high idle problem
04-12-2014
With a NIC cam, the code P0300 needs to be shut off.
But I think you need to start with swapping those parts and looking for a vacuum leak. I'd hope you have some sort of scan gauge or whatever to help montior what the car is doing.
04-12-2014
How do you know its misfiring? Is there a code or are you scanning for misfires?
04-14-2014
The code was P0300
04-14-2014
P0300 needs to be turned off for most cams
04-14-2014
I also found out I need a new tps. Would low fluid in the trans make is shift horrible. I thought my pcs was going out but I found my trans dipstick was very loose.
04-14-2014
Yes low fluid will cause shift issuez
04-14-2014
Also what does the rpms drop to in gear?
04-15-2014
With that cam, was any programming down to the pcm?
I've seen idle be vacuum leak, throttle/cruise cables bound/out of place on strut tower, TPS, tuning
04-16-2014
It was my TPS. When it was tuned, they didn't remove the misfire code.
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