Crazy Rpm's
Thread Starter
Member
Joined: Nov 2004
Posts: 86
From: Tennessee
i test drove my car around the neighborhood and when i brought it home i let it run for a while in the driveway. my rpms are up to 2700-3300. then after a couple of minutes it goes down to 1800 then bounces between that and 900rpms. do anyone have an idea of what this could be and how i could fix this?
Thread Starter
Member
Joined: Nov 2004
Posts: 86
From: Tennessee
probably both. lol i'll just replace all of it. this is a father and son project. so i have all the time in the world. btw, i never knew these cars were so fun to drive. i never knew a n/a had pickup like this. i thought it only existed in turbos. i cant wait to drive a t2 to see how much fun that is...
Member
Joined: Dec 2003
Posts: 94
From: Barksdale AFB, LA
Mine bounces between like 750 and 1500 until it's totally warm. I need to either clean or replace my bac valve. I know that can mess with the idle. Do you have any accessories running while you're driving or letting it idle?
Senior Member
Joined: Mar 2004
Posts: 772
From: Creighton Nebraska
Originally Posted by Apollorx7' date='Dec 30 2004, 08:10 AM
If you car is idling at 2700-3300 rpms, that is definatly not normal. Even bouncing between 900 and 1800 when the engine is warm at idle isnt normal.
at warm up the high idle is normal, the cold start brings the motor to 3,000RPM's for 30 seconds or so, then brings it down to 1,200 or so untill the thermo wax heats up then idle returns to normal, as i understood it he was talking about it warming up for the 2,700 to 3,300, and after the pulseing idle, the pulseing idle is something to look into, but the slightly high idle when starting is nothing to worry about
(this is just stuff i've read so if im wrong somewhere, im sorry)
Senior Member
Joined: Jul 2002
Posts: 348
From: south jersey
Originally Posted by nightwolf_4_98' date='Dec 30 2004, 08:30 AM
at warm up the high idle is normal, the cold start brings the motor to 3,000RPM's for 30 seconds or so, then brings it down to 1,200 or so untill the thermo wax heats up then idle returns to normal, as i understood it he was talking about it warming up for the 2,700 to 3,300, and after the pulseing idle, the pulseing idle is something to look into, but the slightly high idle when starting is nothing to worry about
(this is just stuff i've read so if im wrong somewhere, im sorry)
(this is just stuff i've read so if im wrong somewhere, im sorry)
High idle is normal at warm up but the it sounded to me that the idle of the original poster was that high after driving the car around, and then letting it sit at idle(still warm)
Senior Member
Joined: May 2002
Posts: 22,465
From: California
Originally Posted by majeskyb' date='Dec 30 2004, 08:23 AM
Mine bounces between like 750 and 1500 until it's totally warm. I need to either clean or replace my bac valve. I know that can mess with the idle. Do you have any accessories running while you're driving or letting it idle?
set the tps too
Thread Starter
Member
Joined: Nov 2004
Posts: 86
From: Tennessee
yeah it pulsates once it warms up. so what should the idle rpm be at? maybe i can continue to troubleshoot this car till i fix this problem. so what should i be looking for? the bac, vacuum lines, or the fuel injectors? or is there something totally different that i should have my mind on?
Senior Member
Joined: Mar 2004
Posts: 772
From: Creighton Nebraska
idle should be in the 850-950 range, i'd check vac lines, get the injectors clean or replace them, set the tps and the timeing and everything, and unless somethin else is wrong that should do it