Excessively high idle issue - 4k rpm
05-26-2008, 06:16 PM
#1
'Trynna' is not a word
Thread Starter
iTrader: (19)
Join Date: Mar 2001
Location: Seattle Area, WA
Posts: 7,081
Excessively high idle issue - 4k rpm
Since getting my car back on the road a few months ago I have had a slight oil leak from the rear valve cover. I decided to take care of it and install NWP spacers at the same time to my MEVI equiped 4th gen. Got everything put back together and had a vacuum leak and high idle, found the EGR tube gasket out of place and fixed it. Problem is I still have a very high idle.
When I start up the car, it goes straight to 4k RPM and stays there. It dropped down once to 2500, but then crept back to 4k. Needless to say, on a cold motor, I shut it off pretty quickly.
Vacuum is at -22hg, just like it was before. My idle before all this was dead set at 750rpm. Throttle plate and pedal move freely, no sign of binding, throttle plate closes completely with engine off.
I know it is normal to have a high idle to 1500-2k rpm and pulling the throttle body and IACV, but 4k rpm? That seems excessive to me, especially since I did not adjust anything.
Any comments or suggestions? Car is a 98, Supercharged and modded to the hilt.
When I start up the car, it goes straight to 4k RPM and stays there. It dropped down once to 2500, but then crept back to 4k. Needless to say, on a cold motor, I shut it off pretty quickly.
Vacuum is at -22hg, just like it was before. My idle before all this was dead set at 750rpm. Throttle plate and pedal move freely, no sign of binding, throttle plate closes completely with engine off.
I know it is normal to have a high idle to 1500-2k rpm and pulling the throttle body and IACV, but 4k rpm? That seems excessive to me, especially since I did not adjust anything.
Any comments or suggestions? Car is a 98, Supercharged and modded to the hilt.
05-26-2008, 08:04 PM
#4
'Trynna' is not a word
Thread Starter
iTrader: (19)
Join Date: Mar 2001
Location: Seattle Area, WA
Posts: 7,081
Problem fixed. For some reason, the cruise control cable took up some slack and was causing the throttle body to open slightly, raising the RPM. Never messed with it when I pulled the engine, but apparently something caused it to move this time.
05-27-2008, 09:12 AM
#7
I was about to ask if you were sure the throttle plate is closing.Glad you got it fixed. Is it idling smooth now?
05-27-2008, 02:23 PM
#9
05-29-2008, 07:55 AM
#10
'Trynna' is not a word
Thread Starter
iTrader: (19)
Join Date: Mar 2001
Location: Seattle Area, WA
Posts: 7,081
You put out an awsome product Aaron, I have no complaints. Good instructions and excellent fitment. Idle is the same, but it does seem to pull a little harder on the top end. I have a quaife LSD, and before the install I could feel the tires trying to break loose at the top of second. After the install, they are definetly hunting for traction at the top of 2nd. Not exactly scientific I know, but I have not dyno'd yet, so that is the best I've got. I have an MEVI installed but not hooked up to actuate yet, I can only imagine my traction problems once that is done...
http://i47.photobucket.com/albums/f1...x/100_1398.jpg
http://i47.photobucket.com/albums/f1...x/100_1399.jpg
http://i47.photobucket.com/albums/f1...x/100_1400.jpg
And the best plug I can give...
http://i47.photobucket.com/albums/f1...x/100_1398.jpg
http://i47.photobucket.com/albums/f1...x/100_1399.jpg
http://i47.photobucket.com/albums/f1...x/100_1400.jpg
And the best plug I can give...
Last edited by mtrai760; 05-29-2008 at 07:58 AM.
Thread
Thread Starter
Forum
Replies
Last Post
Justin Kroll
5th Generation Maxima (2000-2003)
7
09-02-2015 11:06 AM