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Low idle and almost dies when clutch is pressed.

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Old 01-16-2014, 03:23 AM
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Low idle and almost dies when clutch is pressed.

My 2003 G35 coupe 6mt has been acting up as of late. I've had the car two years this February.

Last year I noticed the car almost died when I came to a stop, it did die once, and only happens when I push the clutch in. Starting this month (January) it has started doing this again, but it has yet to die, it got close, the red battery light came on but recovered.

Currently when I start the car it idles at 1000-1100. After the car warms up it wants to idle at 100-0.

For example, I get into town to get breakfast at a gas station, I get back in my car and start it, it revs up to 1000 then drops to 100-0 instantly and the car shakes a bit, I have to rev the engine sometimes or it does die. I have attached a video showing it idling when it's warm. The car has always done this.


I have read a few posts and they ask whither or not the ac is on when it idles low, I have put both no ac, and ac on in the video.

When I purchased the car it had a piggy back mapping chip, it was causing misfiring so I replaced the spark plugs, coil packs and cleaned the maf. It still misfired and was sluggish to accelerate, so I removed the mapping chip. The car has ran perfect since then and I actually gained power without the mapping chip. I have a notepad the first owner of the car kept showing oil changes and most of the mods done to the car, although it doesn't have all of them listed. By looking at the engine I believe it has a plenum spacer, it has a k&n typhoon intake, and a lot of other mods not pertaining to the engine.

I am wondering if these two issues stem from the same problem.
Old 01-16-2014, 01:09 PM
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Did u do a throttle body reset??
Old 01-16-2014, 01:14 PM
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I have not. I'm not exactly sure how to go about it.
Old 01-16-2014, 04:36 PM
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Do a throttle body reset and if that doesnt help maybe clean your MAF (Mass Air Flow Sensor)
Old 01-16-2014, 04:41 PM
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Quote:
Originally Posted by Tekwhat View Post
I have not. I'm not exactly sure how to go about it.
It should be a sticky on here, search for it, its a long process.. lol
Old 01-17-2014, 10:19 AM
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Had similar issue and it was my MAF. Once that was changed, ran perfect.
Old 01-27-2014, 08:20 AM
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It's normal for the car to start at 1100 rpms and go down to about 650 or so once its warmed up. That first line on the tach is 500 rpms, not 100.



It's not normal for the car to stall when the clutch is pressed in.
Old 01-27-2014, 04:46 PM
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Interesting, I didn't know that was 500.

Would my heat blowing cold air when I push the clutch in be tied to this at all? When I slow down and stop my heat blows cold air, but blows hot air when I start moving again.
Old 01-28-2014, 08:19 PM
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my 6MT car idles lowish like yours when hot i cant imagine that the clutch has anything to do with cold air blowing when stopped. mine doesnt blow as hard when stopped but when the engine starts moving it will blow harder that is just from the alternator generating more power and making everything work as it should. check your coolant level if its low it might be efecting how much flows to the heater core. just a thought not sure.
Old 04-22-2014, 04:22 PM
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searching for the Throttle body reset post and cant find it... someone have a link by chance plz?

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