I have a built 98 cobra, 5 speed, forged internals, heads and intake already installed naturally aspirated and functioning properly prior to the below modifications.
I recently added 4:30 gears, Aluminum Driveshaft, Cold Air Intake, took the upper and lower intake manifolds off to clean the IMRC's and also replaced the IMRC module that is bolted to the bottom of the lower intake manifold. THE CAR RUNS SICK NOW - WILL STOMP VETTE'S ALL DAY LONG BUT....These mods were all done at the same time and the car wasn't driven for 2 weeks...
Whenever I put the car in neutral it revs up to exactly 2,000 rpms(as if I were giving it gas to keep it there like I was going to launch it - just trying to give you guys a picture) it will stay exactly at 2,000 rpms for about a second, give or take, and then rev down to normal idle which is 900-1000 rpms like an engine would normally rev down from 2,000 rpms to idle. I can also be sitting at idle, we'll call it 900rpms and put the clutch in and it will rev up to 2,000 rpms and do the same thing.
I am wondering if you guys have any suggestions of what is causing this - I mean "technically" it gives me a little more edge off the line - essentially the car helps launch itself if I may(burning more gas obviously) - but I am more concerned if it's something that needs to be fixed, or is it as simple as unplugging my battery(again) and seeing if that will clear it up - my mustang friends are at a loss for what would cause this...We originally unplugged the battery multiple times to get the idle to correctly be at 900 rpms after the computer reset itself.
Bottom line is the car is running AWESOME - I beat a supercharged cobra last night that wanted to mess around - if that says anything...but the ONE problem is this stupid idle thing. I am not sure if its complicated to fix it or if I just need to unplug the battery and see if it will fix itself....
THANKS FOR THE ADVICE!!!
I recently added 4:30 gears, Aluminum Driveshaft, Cold Air Intake, took the upper and lower intake manifolds off to clean the IMRC's and also replaced the IMRC module that is bolted to the bottom of the lower intake manifold. THE CAR RUNS SICK NOW - WILL STOMP VETTE'S ALL DAY LONG BUT....These mods were all done at the same time and the car wasn't driven for 2 weeks...
Whenever I put the car in neutral it revs up to exactly 2,000 rpms(as if I were giving it gas to keep it there like I was going to launch it - just trying to give you guys a picture) it will stay exactly at 2,000 rpms for about a second, give or take, and then rev down to normal idle which is 900-1000 rpms like an engine would normally rev down from 2,000 rpms to idle. I can also be sitting at idle, we'll call it 900rpms and put the clutch in and it will rev up to 2,000 rpms and do the same thing.
I am wondering if you guys have any suggestions of what is causing this - I mean "technically" it gives me a little more edge off the line - essentially the car helps launch itself if I may(burning more gas obviously) - but I am more concerned if it's something that needs to be fixed, or is it as simple as unplugging my battery(again) and seeing if that will clear it up - my mustang friends are at a loss for what would cause this...We originally unplugged the battery multiple times to get the idle to correctly be at 900 rpms after the computer reset itself.
Bottom line is the car is running AWESOME - I beat a supercharged cobra last night that wanted to mess around - if that says anything...but the ONE problem is this stupid idle thing. I am not sure if its complicated to fix it or if I just need to unplug the battery and see if it will fix itself....
THANKS FOR THE ADVICE!!!