Strange idle problem with GTM SC Stage 1

wind.zero · 11-30-2011, 04:20 PM

Quote:

Originally Posted by Nixlimited

Is the AC compressor kicking on?

The erratic idle is independent of the AC. It happens with the AC on or off. It was off during the video.

Thanks for the responses. I am waiting to hear back from Sam and Kenny, but I am leaning towards changing the plugs and trying the ECU learning.

If you watch the video close from start to finish, you see the idle bounce around 50-75 maybe 100 RPM. It feels like a slight knock which I hope are the spark plugs. Then at around 40-43 seconds in the video when it dramatically dips, the car shudders and usually the idle shoots to 750 and stays there. It is really odd but it happens at least once everyday. It is hard to reproduce though. I cannot make it do it.

Bullitt
Mine has never completely died. It comes close and only at idle for 30-40 seconds like at a stop light. It does not happen when rolling luckily.

weiboy718
Do you know the part number for the HKS plugs?

kosstick · 11-30-2011, 04:25 PM

is the car not supposed to drop to 500? my Gtm stage 2 occasionally dips to 500 at a red light and shudder slightly as if its gonna "stall" but always kicks back up. Seb at Specialty z says its normal.

Nixlimited · 11-30-2011, 06:05 PM

Quote:

Originally Posted by kosstick

is the car not supposed to drop to 500? my Gtm stage 2 occasionally dips to 500 at a red light and shudder slightly as if its gonna "stall" but always kicks back up. Seb at Specialty z says its normal.

My old M3 would do this too after I got it tuned. Never died, but sometimes felt like it was going to.

VQStryker · 11-30-2011, 06:50 PM

watching outcome for future knowledge

Alchemy · 11-30-2011, 06:54 PM

Quote:

Originally Posted by VQStryker

watching outcome for future knowledge

Agreed, Im contimplating a GTM stage 1 supercharger kit.

weiboy718 · 11-30-2011, 08:04 PM

Quote:

Originally Posted by wind.zero

The erratic idle is independent of the AC. It happens with the AC on or off. It was off during the video.

Thanks for the responses. I am waiting to hear back from Sam and Kenny, but I am leaning towards changing the plugs and trying the ECU learning.

If you watch the video close from start to finish, you see the idle bounce around 50-75 maybe 100 RPM. It feels like a slight knock which I hope are the spark plugs. Then at around 40-43 seconds in the video when it dramatically dips, the car shudders and usually the idle shoots to 750 and stays there. It is really odd but it happens at least once everyday. It is hard to reproduce though. I cannot make it do it.

Bullitt
Mine has never completely died. It comes close and only at idle for 30-40 seconds like at a stop light. It does not happen when rolling luckily.

weiboy718
Do you know the part number for the HKS plugs?

part # from GTM
50003-M40HL HKS Sparkplug8HR

you should def ask a expert before taking the plunge though.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Little issue at idle..	pty370z	Engine & Drivetrain	43	08-31-2015 11:23 PM
Strange 7AT Problem this AM...	Fly1 Motorsports	Engine & Drivetrain	17	04-27-2014 06:00 PM
stage 2 twin turbo problem!!!	LafitteZ	Forced Induction	19	09-23-2011 03:40 PM
Clutch feels strange, is this common or a problem	laze1	Engine & Drivetrain	11	01-27-2010 07:02 AM
HELP PLEASE: Engine Idle Problem	myfirstz	Engine & Drivetrain	21	06-29-2009 05:40 PM

11-30-2011, 04:25 PM	#2 (permalink)
kosstick Track Member Join Date: Apr 2011 Location: Los Angles Posts: 668 Drives: G37 Rep Power: 16	is the car not supposed to drop to 500? my Gtm stage 2 occasionally dips to 500 at a red light and shudder slightly as if its gonna "stall" but always kicks back up. Seb at Specialty z says its normal.

11-30-2011, 06:50 PM	#4 (permalink)
VQStryker Track Member Join Date: Jul 2011 Location: Texas Age: 36 Posts: 659 Drives: :( Rep Power: 15	watching outcome for future knowledge