Idle fluctuates when cold

smittyocat · #1 12-05-2005, 05:31 PM

Well as the title says its a 90 RX-7 vert with over 130k on it, when it is cold the idle will fluctuate between 1000-1500 rpms at a stoplight (stickshift car) as soon as it warms up (about 10-15 min of driving) the idle stabilizes and is fine. I am thinking IAC but am wondering if anyone else has an opinion on this. Thanks for any info

drftk1d · #2 12-06-2005, 07:47 AM

sounds normal

Capt.Moe · #3 12-06-2005, 10:55 PM

Quote:

Originally Posted by drftk1d

sounds normal

I unno, My buddies is kind of like that aswell, but it usually idles good till it warms up, then the idle will sometimes hover at like 2-3k, and drops down to like 300.

FDTT · #4 12-06-2005, 11:31 PM

S4's idle sucks :P So many issues, but you can try a new BAV from another 7 and see if it helps. Also check all vac lines and make sure your idle is set proper and the TPS is working good.

drftk1d · #5 12-07-2005, 01:41 AM

Quote:

Originally Posted by FDTT

S4's idle sucks :P So many issues, but you can try a new BAV from another 7 and see if it helps. Also check all vac lines and make sure your idle is set proper and the TPS is working good.

its a 90, so S5

FDTT · #6 12-07-2005, 01:24 PM

lol, sorry not sure why i said that :P

Are you shure your cold idle is set properly?
When was the last time you adjusted the TPS?
Is the IAC valve original?
Any recent work done to the car?

FDTT · #7 12-07-2005, 01:25 PM

Quote:

Originally Posted by drftk1d

its a 90, so S5

LMAO, sorry i had been dringking, what the fuck is a BAV ? LMAO god booz and me are not good friends.

smittyocat · #8 12-09-2005, 06:04 PM

IAC is original car also does it when AC is on and stalls until car warms up

drftk1d · #9 12-09-2005, 07:49 PM

okay, where do you think the idle should be when its cold out and you start the car?

smittyocat · #10 12-10-2005, 01:56 AM

I would think about 1k but the problem is that it fluctuates wildly.

endeffect0 · #11 12-10-2005, 07:50 AM

just a thought... if the car has 130k on it and its the factory engine your probably gona need a new one soon. .. that may have nothing to do with your idle, but you should still be wary of many highmileage type problems that could be affecting it.

drftk1d · #12 12-12-2005, 11:56 PM

Quote:

Originally Posted by endeffect0

just a thought... if the car has 130k on it and its the factory engine your probably gona need a new one soon. .. that may have nothing to do with your idle, but you should still be wary of many highmileage type problems that could be affecting it.

no, my engine has like 120k on it and its fine

check your vaccum lines or the thermo wax

theres also an idle adjustment screw on top of the throttle body

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