tcraven92

Alright so i really dont know the technical word or phrase to put this but here I go. I have a 98 teggy gsr with b18c and it will crank and fire up instantly, idles nice and smooth for around 5-10 minutes then idle becomes rough. It will go strong then weak strong then weak. Like rpm will go high then die down then go high again and repeat. Anyone know the cause to this? And also it runs fine when I give it gas and drive around. I have just been idling alot in my garage making sure everything is okay with it and was wondering the problem. I have like 3 gallons in the tank. Thanks

hatchblack

just close the garage door and all windows next time. the vacuum will help it run better.... but stay in there for a couple hours or until the gas runs out

its either a vacuum leak, bad/dirty iacv or fitv, or your tb needs an adjustment

and to explain thats idle air control valve, fast idle thermal valve, and throttle body

tcraven92

no way that gives you more vacuum? damn okay ill try that tommorow.
and yea thanks for the info I took the iacv off cleaned it and reset the ecu. runs nice and smooth now.

hatchblack

i hope you know i was joking. i see you signed on at 147am today so i know youre still alive

i have to do this for my car later today. glad you got yours back to normal. gas mileage should go up too

hatchblack

just fixed mine too my fitv was backed all the way out almost

Fabrik8

Something that only affects idle has practically no affect on gas mileage. Unless you spend almost as much time idling as you do driving...

hatchblack

well living here in hampton roads you get stuck at lights a lot and i dont really travel much on the interstate so yeah.... sitting at a light with my engine revving at 3000rpms, im sure it had some sort of affect. or bouncing from 2000-3000 all the time

tcraven92

Haha yea dude still alive. Almost passed out though:0
yea i knew you were joking hah