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rpm's jump at idle?
#491453 11/30/02 03:47 PM
Joined: Aug 2002
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Binghamton, N.Y
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Brad10071977_dup1 Offline OP
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Hi guys, I wonder if anyone would know what would cause this. When I start the car and let it idle, the rpm's drop down to about 250, (no I don't mean 2500) it almost stalls out, and then it jumps up to about 2200 rpms. Then it slowly falls back down again, and starts the whole process over again. It seems to only do it when it's real cold, but sometimes it does it, and sometimes it doesn't. Any help would be very much appreciated. Thank you.

Re: rpm's jump at idle?
#491454 11/30/02 06:46 PM
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biochemist_dup1 Offline
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How many miles are on your car? Could be the fuel injectors. Mine does the same. Adding fuel injector cleaner to an empty tank and driving it helps.

Re: rpm's jump at idle?
#491455 11/30/02 10:08 PM
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Binghamton, N.Y
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Brad10071977_dup1 Offline OP
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a really lot!! LOL, about 160,000. Yeah I'm gonna add some fuel injection cleaner and run some really good gas in it. Thanx!!

Re: rpm's jump at idle?
#491456 12/01/02 04:38 PM
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Ottawa,ON CANADA
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Roger C_dup1 Offline
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My 95 did that last February. IAC (idle air control) was replaced and idle learning redone.Symptons returned last month. IAC was replaced under warranty (12 months/20000 kms)
but problem was not fixed. Upper intake gaskets , (2 @ $$14.99 CDN and 1 hour labour)were the culprits and she runs fine now at 214000 kms (128400 miles)
I had tried fuel injector cleaner, but symptons returned after half after running half a tank of gas.

Last edited by Roger C; 12/01/02 04:44 PM.
stock 95 LX,6cyl ATX 98.5 wheels with Yokohama AVID T4's
Re: rpm's jump at idle?
#491457 12/01/02 05:06 PM
Joined: Sep 2002
Posts: 1,957
Houston Texas
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lsneo Offline
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use chevron with techron gas. It really is better than others.

NEED AN SVT REAR BUMPER!!! pm me
Re: rpm's jump at idle?
#491458 12/02/02 12:33 AM
Joined: Aug 2002
Posts: 126
Binghamton, N.Y
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Brad10071977_dup1 Offline OP
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I put some fuel injector cleaner in, and it hasn't done it since. If it returns, I will keep the intake gaskets in mind. Cheap thing that wouldn't hurt at 160,000 miles anyhow. Thanks for the info guys!!

Re: rpm's jump at idle?
#491459 12/02/02 01:49 AM
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Houston Texas
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lsneo Offline
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ur welcome..... u should really consider using only chevron gas. Me and my brother are religious about that.

NEED AN SVT REAR BUMPER!!! pm me

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