RPM Jumping at warm up

[hibbs11]

I noticed today when I started my car this morning to let it warm up and after it was started it was running at about 1700 RPM's and after about 1min. I hit the gas pedal when I was getting in the car and the Rpm's started jumping from 1500 to 1000 back and forth so I held the gas pedal down for a little bit to bring the RPM' up to 2000 and when I let off it idle down to about 800 RPM's .My question is what would cause it to fluctuate

[starchland]

is it just the tach jumping or is the engine and the tach doing the same thing?

[hibbs11]

Eng. and Tach

[NAiL05]

is it just the tach jumping or is the engine and the tach doing the same thing?

Answer that. But with that lil fluctuation and the motor is most likely goin with it. If its cold start most likely its the FITV thats starting to go out. The IACV wouldnt be a bad thing to clean while doing this since your on the IM cleaning. If it was just tach movement, but engine doesnt follow the rpm it would be Ignitor related. But sounds like FITV to me with such lil fluctuation and there is no more information but 1000-1500 rpm.

[hibbs11]

It only happens if you hit the gas while it is still in warm up mode. If you don't touch the gas it warms up normal.

[starchland]

probably either fiv or iacv check and clean them like stated above

[XcluziveAZN]

i get the same thing in my car. All i do is Start the car let it warm up til the temp go up between H and C. I dont rev or anything. If my car is cold and i put in Drive. It start going from 1000 to 1500 up and down.

Hmmm I wonder if this any major problem.

[XcluziveAZN]

i just look at sticky to see what FITV IAVC stand for ><

and i got this http://www.cb7tuner.com/vbb/showthread.php?t=65668
i guess that the solution to your and mine problem

got to love cb7tuner.com

oh what does FITV and IAVC stand for?

[hibbs11]

Thanks, that sticky helps! I will try that tommorow.

[starchland]

fast idle valve and idle air control valve i believe

[XcluziveAZN]

fast idle valve and idle air control valve i believe

sound like it to me thank.

[PowderedMilkMan]

Yeah do those tests before you replace anything because I assumed it was my fast idle valve. After I found out that it sucked in air when the engine was cold and stopped suction after operating temp was up I didn't have to replace it. I believe my problem is a mechanical failure in the IACV.

[Law Grandeur]

throttle position sensor. if you plan on replacing the iacv then try cleaning it first with throttle body cleaner. sometimes it gets gunky. good luck!

[eastern_ethics]

thanks guys I was having the same problem

[90Haccord]

It's already been said...

but its def the FITV

My car is an automatic, I started it, it idled fine, then as soon as I put it into drive and hit my brakes at the first stoplight, it started surging from 1500rpms to 800rpms. Car never died, nor did it act like it would but after I cleaned the FITV problem was SOLVED.