High Idle in gear?
07-15-2007 | 02:02 PM
#21
Originally Posted by LS1NUT26
You know just for ***** and giggles was makes you an expert it vac leaks?
07-15-2007 | 11:23 PM
#23
Originally Posted by FieroZ34
Who said I was an expert?
But, for the sake of argument, please tell me ANY other way in which a car can idle abnormally high. I mean, you're posting in Advanced Tech, you must know something.
But, for the sake of argument, please tell me ANY other way in which a car can idle abnormally high. I mean, you're posting in Advanced Tech, you must know something.
LS1NUT26,
It only idles high when in Park/Neutral for a couple seconds....correct?
07-16-2007 | 01:37 AM
#25
I quoted you saying "But, for the sake of argument, please tell me ANY other way in which a car can idle abnormally high"
I left your piece of **** snippy comments out of it....I am trying to help him diagnose WHERE the vacuum leak is....I'm trying to help him find the leak, stop showing off...you're not impressing anyone by trying to act like you know more than someone....it's really pathetic....
you saying "vacuum leak", and not giving him any specifics, is kind of like **** on a bull......or a fiero with a turbo
I left your piece of **** snippy comments out of it....I am trying to help him diagnose WHERE the vacuum leak is....I'm trying to help him find the leak, stop showing off...you're not impressing anyone by trying to act like you know more than someone....it's really pathetic....
you saying "vacuum leak", and not giving him any specifics, is kind of like **** on a bull......or a fiero with a turbo
07-16-2007 | 07:51 PM
#26
i had a vacuum leak on mine and it didn't idle high, it dropped in idle to 200 rpm backfired 3 or 4 times. the way i know it was a vacuum leak is cause the manifold wasn't bolted down all the way and the hose that goes from the back of the manifold to the brake booster was on but the clamp wasn't put over the hose. good luck with your problem LS1nut
07-16-2007 | 08:01 PM
#27
[QUOTE=LS1BADZ]Bad IAC sensor?
Not sure yet, cause I wont have access to another sensor till later tonight, but I think that is what it my be. Thanks LS1BADZ your a genius!!!!!!!!
You must have an actual LS1 car at one point to even know about them unlike someone I know ie...
fieroz34
But while I'm at it I will also check that to. thanks King...
Boy it is finally nice to have people helping with locations to look instead of someone just saying "Oh it's a vac leak"
Not sure yet, cause I wont have access to another sensor till later tonight, but I think that is what it my be. Thanks LS1BADZ your a genius!!!!!!!!
You must have an actual LS1 car at one point to even know about them unlike someone I know ie...
fieroz34
But while I'm at it I will also check that to. thanks King...
Boy it is finally nice to have people helping with locations to look instead of someone just saying "Oh it's a vac leak"
07-16-2007 | 08:26 PM
#28
You don't need a sensor to test the IAC. Start it, let it idle high, and block the IAC passage that's right before the throttle blade with your finger. If the car's idle drops noticably, your IAC is bad.
Oh, and who the f*ck said I don't have an LS1?
My 2002 SuperSport, SLP Limited Edition 2876:
I just use the Fiero in my sig because I'm proud of it. Anyone can make the payments on a $20k Camaro, but building your own equal length headers, one-off turbo kit, and a complete engine swap is something very few people can do.
Oh, and who the f*ck said I don't have an LS1?
My 2002 SuperSport, SLP Limited Edition 2876:
I just use the Fiero in my sig because I'm proud of it. Anyone can make the payments on a $20k Camaro, but building your own equal length headers, one-off turbo kit, and a complete engine swap is something very few people can do.
07-17-2007 | 03:40 PM
#31
Originally Posted by King Nothing
oh yeah another common vacuum leak people pass up, check your lid and the neck all the way to the tb. make sure they are securely on and the fittings are nice and tight
07-18-2007 | 10:05 PM
#32
Originally Posted by FieroZ34
You don't need a sensor to test the IAC. Start it, let it idle high, and block the IAC passage that's right before the throttle blade with your finger. If the car's idle drops noticably, your IAC is bad.
Have you even read my initial post?
And other thing don't even start getting snippy with me, Just remember I was out seeking help and you brought yourself into this, and started saying stuff like "How is this supposed to be Advanced Tech" and continually saying that IT'S A VACUUM LEAK!!!!! and stupid crap like that.I can't tell you how sick of this kind of crap I'm. I see alot of people doggin on others and it is really pathetic. So don't even post on any of mine anymore cause your advice obviously and worth it.
07-19-2007 | 05:14 PM
#34
Registered User
Joined: Jul 2007
Posts: 2
Likes: 0
From: NY
From experience I have seen electrical problems cause idle surges and abnormal rpm changes. I had a c5 with a short and it would kit up to 1600-1800 rpm for no reason I tried everything to figure it out and it only stopped when I replace the ecm. I have also seen the FAST Flash programmers cause these conditions.
07-19-2007 | 08:02 PM
#35
Thanks for the input 1500hd, I had a code of P0507 come up, it was deleted about three weeks ago and it stayed off until yesterday morning. It finally went back off today after work. So it might be that it an electrical problem. I'll have to check further into it.
07-19-2007 | 10:41 PM
#36
Dude, just quit whining. This thread IS in the wrong forum. Fiero called you out on it...Get over it.
Just for your reference, this is from the sticky at the top of this forum.
We created this new forum due to suggestions from long-time members and site sponsors who wanted a forum that focused on advanced performance related discussion. This forum will be reserved for highly technical discussions involving performance engineering, design, theory, or mathematics. Advanced topics can be related to engines, performance parts, EFI computer diagnostics and tuning, suspension design and geometry, poweradders, etc...
Anyhow, back to your problem. Like you've been told, you have a vacuum leak. I don't care if you sprayed for one. That's your problem. From there, we can't really help you. Try replacing your IAC sensor since you can't your IAC passage while driving down the road. Other than that, you just have to track it down.
Just for your reference, this is from the sticky at the top of this forum.
We created this new forum due to suggestions from long-time members and site sponsors who wanted a forum that focused on advanced performance related discussion. This forum will be reserved for highly technical discussions involving performance engineering, design, theory, or mathematics. Advanced topics can be related to engines, performance parts, EFI computer diagnostics and tuning, suspension design and geometry, poweradders, etc...
Anyhow, back to your problem. Like you've been told, you have a vacuum leak. I don't care if you sprayed for one. That's your problem. From there, we can't really help you. Try replacing your IAC sensor since you can't your IAC passage while driving down the road. Other than that, you just have to track it down.
07-20-2007 | 10:08 PM
#38
Moved from advanced tech. Friendlier help in this section.
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2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
07-23-2007 | 01:21 AM
#39
I would pull the throttle body off and hold it up to a light to see how much light is shining through between the blade and the housing. My first one I ported I got too far down where the blade is so it was letting too much air in to it. It done the exact same thing as what you are describing. Also maybe somebody messed with the adjustment screw. Have it screwed in too far, that will also do it. If you need any help just send me a pm. If you could take a pic of the screw on the throttle body i can tell you if it's way out of adjustment.
07-24-2007 | 10:25 PM
#40
Originally Posted by mvvette97
I would pull the throttle body off and hold it up to a light to see how much light is shining through between the blade and the housing. My first one I ported I got too far down where the blade is so it was letting too much air in to it. It done the exact same thing as what you are describing. Also maybe somebody messed with the adjustment screw. Have it screwed in too far, that will also do it. If you need any help just send me a pm. If you could take a pic of the screw on the throttle body i can tell you if it's way out of adjustment.