Erratic/Surging idle
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 1,024
Likes: 0
From: Long Island New York
Erratic/Surging idle
My 88 has recently began suffering from a surging idle, most prominent when cold. Car has thrown no codes whatsoever. I am fairly certain that there are no vacuum leaks as well. It doesn't really affect performance; more of an annoyance than anything else. Anybody else experience a similar problem and have any luck correcting? Thanks in advance!
Last edited by Mr Mojo; Jan 8, 2005 at 10:52 PM. Reason: sig pic too large
Pro
Joined: Jun 2003
Posts: 559
Likes: 6
From: OKC OK
If your idle is surging..."hunting"...then you have a vacuum leak.
Save yourself the time, frustration and dollars...
Buy a Felpro intake gasket set and replace them...all of them.
You'll be golden in an afternoon...and you can use the oppurtunity to give your dremel some exercise. Open up the plenum and runners and gasket match the intake while you're there. Have fun!
Save yourself the time, frustration and dollars...
Buy a Felpro intake gasket set and replace them...all of them.
You'll be golden in an afternoon...and you can use the oppurtunity to give your dremel some exercise. Open up the plenum and runners and gasket match the intake while you're there. Have fun!
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 1,024
Likes: 0
From: Long Island New York
Mtlsphere, i said i was fairly certain there are no vacuum leaks, But of course not 100%. (i don't think there is any way of ever being 100% sure on these cars...lol) So you figure just do a complete intake set and check ALL lines hoses, etc? I agree with it apart that far, a little port matching may be inevitable Thanks for your advice!
:
Thanks for your advice!:
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 1,024
Likes: 0
From: Long Island New York
Originally Posted by jabez
Last month My 92 was experiencing similiar problems. Bought a 2.00 PCV valve and problem gone.
damn, one for the team
if only everything was that easy. I'm going to swing past the parts store on my way home; you never know! Thanks for the tip jabez!
Pro
Joined: Jun 2003
Posts: 559
Likes: 6
From: OKC OK
I'm speaking from experience. I fought the same condition for the better part of a year. I checked everything and thought the same as you. I even replaced the switch on the brake pedal for the cruise control. Still the idle was hunting. I swapped more and more parts and still the idle was hunting...
Your idle is hunting for a reason.
The reason is a vacuum leak. No codes is a clue that everything is working.
But don't take my word for it. I don't have a clue what I'm talking about. Everyone needs to learn the hard way.
Your idle is hunting for a reason.
The reason is a vacuum leak. No codes is a clue that everything is working.
But don't take my word for it. I don't have a clue what I'm talking about. Everyone needs to learn the hard way.
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 1,024
Likes: 0
From: Long Island New York
Originally Posted by MtlSphere
I'm speaking from experience. I fought the same condition for the better part of a year. I checked everything and thought the same as you. I even replaced the switch on the brake pedal for the cruise control. Still the idle was hunting. I swapped more and more parts and still the idle was hunting...
Your idle is hunting for a reason.
The reason is a vacuum leak. No codes is a clue that everything is working.
But don't take my word for it. I don't have a clue what I'm talking about. Everyone needs to learn the hard way.
Your idle is hunting for a reason.
The reason is a vacuum leak. No codes is a clue that everything is working.
But don't take my word for it. I don't have a clue what I'm talking about. Everyone needs to learn the hard way.
But i don't want to learn the hard way....
lol I'm not doubting you at all, it very much makes sense, like you said: No codes indicates all is ok, and it definitely is a classic symptom of a vacuum leak. i'm just open to everyones suggetions. I can't lay the car up for even a day right now, so just taking all into consideration. I'm definitely going to do the entire intake set when i get a day to do it. I appreciate the advice, and no matter what, it can only be for the better regardsless. I just wish i had a nice cam and miniram to bolt on whilei have it apart...............:
Burning Brakes
Joined: Aug 2001
Posts: 1,038
Likes: 15
From: Brick- Next to the land of Mojo NJ
Originally Posted by MtlSphere
I'm speaking from experience. I fought the same condition for the better part of a year. I checked everything and thought the same as you. I even replaced the switch on the brake pedal for the cruise control. Still the idle was hunting. I swapped more and more parts and still the idle was hunting...
Your idle is hunting for a reason.
The reason is a vacuum leak. No codes is a clue that everything is working.
But don't take my word for it. I don't have a clue what I'm talking about. Everyone needs to learn the hard way.
Your idle is hunting for a reason.
The reason is a vacuum leak. No codes is a clue that everything is working.
But don't take my word for it. I don't have a clue what I'm talking about. Everyone needs to learn the hard way.
i've seen bad injectors cause a hunting idle
i've seen a loose reluctor ring inside the distrib cause a hunting idle
food for thought
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Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 1,024
Likes: 0
From: Long Island New York
Thanks for the input 1991camaro. I'm going to have to go over alot of stuff it seems. a good solid day should yeild some results i suppose...i'll definitely go over that stuff too; thanks!