Any speed over 7mph, idles at 2000 rpm - 3000GT/Stealth International Message Center

mike1327 · 04-24-2005, 06:13 PM

After I spun my vr4 off the road, it sits at 2k rpm at any speed above 7mph. 7 and under it idles like normal. If I am going above 7 mph, I can shut the car off in neutral, and start it back up, and it immediately jumps back up to 2k.
It seems like a computer confusion problem, because it drops immediately to normal idle once you slow down to 7mph. Any ideas? Ever heard of something like this? Could it be vacuum hosing leaks?

Deathsled · 04-24-2005, 06:25 PM

I thought that was how it works. Doesnt the ECU raise the idle speed when the car is moving?

mike1327 · 04-24-2005, 07:41 PM

NO. when you hit the clutch, it should drop to normal idle, 750 rpm or so.

mike1327 · 04-24-2005, 07:42 PM

NO it should drop to normal idle, 750 or so.

*GT · 04-24-2005, 08:45 PM

Its probably caused by a failure in the ABS system, Is the ABS light on? That is exactly what happens when you disconnect the ABS fuse. It's not simple vacuum leaks or it would always idle high.

mjannusch · 04-24-2005, 08:58 PM

Quote:

Originally Posted by mike1327

NO it should drop to normal idle, 750 or so.

No, it should drop to around 1200 rpm until you slow down below 10 mph or so. 2000 is way too high though. It keeps the idle higher when moving to help supply vacuum boost to the brake system.

Rustang Cobra · 04-24-2005, 09:19 PM

haha good job tim...you nailed it right on the head

after he slid off the road, i told him to pull the abs fuse cause our abs is retarded, uselesss and almost killed both of us in the snow a fair share of times

we both thought it was a result of the accident, i didn't think the abs fuse would have anything to do with it

is there anyway to disable the abs while not having that 2000rpm idle problem??

*GT · 04-24-2005, 09:25 PM

LOL didn't realize who it was at all. Yea the ABS can be a little retarded its a little overexuberent sometimes. If you leave the fuse in place and disconnect the speed sensors, or the main unit (located behind the pass side rear speaker panel), it should disable the abs without affecting the idle.

Bob The Great · 04-24-2005, 09:41 PM

does this also happen when the car is in diagnostic mode (for example, running a datalogger)?

Rustang Cobra · 04-24-2005, 09:46 PM

i have my car in diagnostics mode disabling the abs by using a datalogger and i do not have the same issue

04-24-2005, 06:13 PM	#1 (permalink)
mike1327 Forum Member Join Date: Mar 2005 Location: boston, ma Drives: 1997 Mits Eclipse RS Trader Rating: (0)	Any speed over 7mph, idles at 2000 rpm After I spun my vr4 off the road, it sits at 2k rpm at any speed above 7mph. 7 and under it idles like normal. If I am going above 7 mph, I can shut the car off in neutral, and start it back up, and it immediately jumps back up to 2k. It seems like a computer confusion problem, because it drops immediately to normal idle once you slow down to 7mph. Any ideas? Ever heard of something like this? Could it be vacuum hosing leaks?

04-24-2005, 06:25 PM	#2 (permalink)
Deathsled is drifting WAY too hard! Join Date: Sep 1999 Location: Raleigh, NC Drives: only in 1st gear Trader Rating: (20)	Re: Any speed over 7mph, idles at 2000 rpm I thought that was how it works. Doesnt the ECU raise the idle speed when the car is moving? __________________ 96 VR4 w/ Iridium Intercooler

04-24-2005, 07:41 PM	#3 (permalink)
mike1327 Forum Member Join Date: Mar 2005 Location: boston, ma Drives: 1997 Mits Eclipse RS Trader Rating: (0)	Re: Any speed over 7mph, idles at 2000 rpm NO. when you hit the clutch, it should drop to normal idle, 750 rpm or so. __________________ 1997 Eclipse RS: New paint, 18" Konig wheels, AEM Intake, short throw, 4" fart-can muffler. $900 total. Just put on factory 5-spoke 16" chromies, and a stock exhaust is going on next. 10" Eclipse sub in custom FG enclosure almost finished. Anyone need some cheap 18" Konigs with tires?

04-24-2005, 07:42 PM	#4 (permalink)
mike1327 Forum Member Join Date: Mar 2005 Location: boston, ma Drives: 1997 Mits Eclipse RS Trader Rating: (0)	Re: Any speed over 7mph, idles at 2000 rpm NO it should drop to normal idle, 750 or so.

04-24-2005, 08:45 PM	#5 (permalink)
*GT One Shizz-rippin' M F Join Date: Apr 2000 Location: Stow, MA, US Drives: Daihatsu Trader Rating: (43)	Re: Any speed over 7mph, idles at 2000 rpm Its probably caused by a failure in the ABS system, Is the ABS light on? That is exactly what happens when you disconnect the ABS fuse. It's not simple vacuum leaks or it would always idle high. __________________ www.pansypatrol.com Black 92RTTT EVO 3 16g's with JAC headers, 6 speed, 5zigen FNO1c's, AN-6 fuel lines and Aeromotive FPR, PTE 680's, 13.5"AP 6pot brakes, AEM EMS, DSM sidemounts, useless stuff removed. 60k's done $300+ parts, can do any 3/S work. Parts for sale: http://www.3si.org/forum/showthread.php?p=3961260#post3961260

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04-24-2005, 09:19 PM	#7 (permalink)
Rustang Cobra I think my cars drunk... Join Date: Jul 2003 Location: Lexington, MA Drives: girls crazy Trader Rating: (31)	Re: Any speed over 7mph, idles at 2000 rpm haha good job tim...you nailed it right on the head after he slid off the road, i told him to pull the abs fuse cause our abs is retarded, uselesss and almost killed both of us in the snow a fair share of times we both thought it was a result of the accident, i didn't think the abs fuse would have anything to do with it is there anyway to disable the abs while not having that 2000rpm idle problem?? __________________ 2003 Nissan 350z - New toy 1993 Stealth Twin Turbo - Sold Old Dyno w/15gs- 404awhp/398awtq @17psi mustang dyno - SOLD 1998 Mustang cobra - RIP Dyno 275rwhp/278rwtq 92 Honda Civic CX Hatchback - Winter beater

04-24-2005, 09:25 PM	#8 (permalink)
*GT One Shizz-rippin' M F Join Date: Apr 2000 Location: Stow, MA, US Drives: Daihatsu Trader Rating: (43)	Re: Any speed over 7mph, idles at 2000 rpm LOL didn't realize who it was at all. Yea the ABS can be a little retarded its a little overexuberent sometimes. If you leave the fuse in place and disconnect the speed sensors, or the main unit (located behind the pass side rear speaker panel), it should disable the abs without affecting the idle.

04-24-2005, 09:46 PM	#10 (permalink)
Rustang Cobra I think my cars drunk... Join Date: Jul 2003 Location: Lexington, MA Drives: girls crazy Trader Rating: (31)	Re: Any speed over 7mph, idles at 2000 rpm i have my car in diagnostics mode disabling the abs by using a datalogger and i do not have the same issue