Took my 2000 FRC in today for a few issues, one of which was that the car was dropping to about 400 rpms for about three seconds before returning to a normal idle everytime I came to a stop. Dealer said its your air intake system... that K & N filter is putting oil on the MAF and causing the problem. I said "It's not a K & N filter.... its foam" They said "well, were sure thats where the problem lies". Watcha think guys???? Anybody out there encountered something similar to this as well? It is a Vararam unit and the only other aftermarket part is the Borla Stingers. Thanks as always!!

 

1. If it's not stalling, do you really care that much?
2. Were you tuned after the mods? Not that you really need it with just those mods, but it may help.
3. Did you ever disconnect the battery to clear the PCM? Just might solve your problem.

Best wishes for a quick fix.

 

It's not stalling but very close... at every single stop I make. thanks for the battery idea, I'll offer that up and see where it goes. Also, there was no tuning performed on the car. thanks.

 

How long has it been since the install of the Vram?

VR :cheers:

 

After cleaning the filter & MAF wires, you can also do the ilde relearn procedeure. Thats usually cures any idle problems...
Disconnecting the neg for 5-10 mins will also help before doing the idle relearn..

 

Did you remove the MAF screen?

 

I know the problem that your talking about. I used to have a 90 model with exhaust as an only mod. Everytime I would come to a stop and push in the clutch, the idle would drop very low. Over time it starting getting worse. It got to the point where the idle would drop to like 200 rpm. It would bounce around 200 to 600, when it normally idles around 900. When the idle drops I could also hear some pretty heavy knocking. Finally it got to the point where it would quit almost everytime I stopped. It would alwalys start back up with no problem. The problem just went away on its own after a while. Never figured out what it was. I know this doesn't help you any, but it sounds like the problem I was having. I'm curious to know what caused it as well.

 

I installed the unit sometime around late August and early September. The dealer contacted me again and basically told me that the CPU has been reprogrammed either via Hypertech or with some other tuning equipment. I told them "Not by me!", so maybe there is more to this than I thought.

O.K., here is the really funny part............ next week I'm having Kooks headers, a 228 cam, pulley, LS1 edit, and gears installed. I just wanted the car safe for the 8 hour drive I have to make to get to the shop for the installation.

I might just drop the issue with the Dealer and have Speed Inc. do some diagnosing for me. Guys.... thanks as always, this forum never disappoints when someone needs help or advice!!

Stephen :cheers:

 

Possible vacuum leak soemwhere? Have you checked to see if there is an air leak forward of the throttle body? It does sound to be more of a MAF issue which it may have gotten dirty. Probably best to disconnect the battery, clean the MAF, check for any worn/lose vacuum hoses, put it all back together and do the idle relearn.

 

If you dont mind, how much is speed inc charging you to do this? I might have mine done too and I was just there the other day.
Dave

 

Wait for new mods and check again. They should be able to find your problem! :cheers: :thumbs:

 

I was gonna say just do the re-learn until I read the rest of the thread....but if you can deal with it just wait till new mods installed...LS-1 edit should take care of the rest :yesnod:

 

If the idle problem is non-computer related then it will be WAY worse after you install a bigger cam. You lose even more vacuum and the car will start to stumble and stall. I had a 224 114 put in and tuned by TR and they could never completely cure my idle proble even setting it as high as 950 with the throttle hole drilled to 1/4 inch:( We replaced the throttle body, the engine idle thing on the throttle body. Tried the stock MAF and nothing would fix it. I used to have this problem(pre-cam installed) only when I took the filter out at the race track. I'd come to a stop and the engine would die on me almost everytime. BTW this was all on my T/A before I bought my vette:)


[Modified by Demented, 9:59 AM 3/12/2004]

 

Damn I had this EXACT same problem after I put my LS6 intake and Twin Flow on. Had so much going on at the time I'm having trouble remembering which cured it. It was either:
1. Vacuum leak (fist intake manifold had a crack in the very back of it, very hard to find, arg!)
2. Input Air Temp sensor (probably damaged when installing twin flow, replaced by the dealer).

Im really tempted to say it was #2, but there has been so much water under the bridge since then, I don't want to mislead you. It was one or the other. I'd really love to have a good 'ole manifold gauge (dating myself). Really this sounds like exactly the same problem. I was using a hypertech also at the time, and it did the same when deprogrammed and the idle relearn was not working (though always worth a try, costs nothing). I do agree that if you are having the car professionally tuned with LS1 edit after your upgrades, that should either fix, or at least make it very easy to find the problem. As far as ignoring it, heh, its too buggy! I would guess you would be alright for the drive though.

Good luck! :thumbs:

One other piece of advise, either go to a new dealer, or find a decent performance shop in your area. If they just want to declare it's your vararam without looking any further (did they even check the codes?) You wouldn't want them fixing it anyway. Been there, done that...


[Modified by IFLUBYU, 11:34 AM 3/12/2004]

 

Run away from the dealer, they always want to blame aftermarket parts instead of putting in the effort to actually fix the car. I agree with everyone else, just have the car professionally tuned with LS1 Edit (which you have to do anyway because of the mods you're making).

 

Well said...I've seen it time and time again.:(

RG

 

Hey guys, thank you sooooooooo much for all of the valueable input. I'll take all the advice and put it to use to figure out this problem. I'll tell you what, this forum completely ROCKS! You know, I'm probably getting a little too old to use that term, oh well. F.W.I.W., my first dealer replaced my clutch about a month ago... my extended warranty people told them to check the synchronizer mech and tranny at the same time. They didn't, I know this. This other dealership I'm working with currently called today and said your synchro is bad! You gotta love it!!!!! Thanks again guys!!! Wish me luck with the install next week.

Stephen