Idling issue - question
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 5,892
Likes: 47
From: Helotes TEXAS
Idling issue - question
Okay so for the past week I've noticed that my FRC has been dropping the idle down from 700-ish to under 500 when I come to a stop. Almost as if it wants to die out and then comes back.
Once I get going again and come to the next stop it does the same thing over again. This is getting pretty annoying. Should i have it checked out at my local dealership ? ( I have a buddy that works there)
OR is there something I can do to fix this ?
Car has new plugs and wires. I cleaned the K&N filter about 3 months ago.
And ideas ??
Once I get going again and come to the next stop it does the same thing over again. This is getting pretty annoying. Should i have it checked out at my local dealership ? ( I have a buddy that works there)
OR is there something I can do to fix this ?
Car has new plugs and wires. I cleaned the K&N filter about 3 months ago.
And ideas ??
Safety Car
Joined: Nov 1999
Posts: 4,570
Likes: 0
From: Welcome to the SEC...#GMFG !!!
Cruise-In I Veteran
National Champs Gators 4 St. Jude '09
Okay so for the past week I've noticed that my FRC has been dropping the idle down from 700-ish to under 500 when I come to a stop. Almost as if it wants to die out and then comes back.
Once I get going again and come to the next stop it does the same thing over again. This is getting pretty annoying. Should i have it checked out at my local dealership ? ( I have a buddy that works there)
OR is there something I can do to fix this ?
Car has new plugs and wires. I cleaned the K&N filter about 3 months ago.
And ideas ??
Once I get going again and come to the next stop it does the same thing over again. This is getting pretty annoying. Should i have it checked out at my local dealership ? ( I have a buddy that works there)
OR is there something I can do to fix this ?
Car has new plugs and wires. I cleaned the K&N filter about 3 months ago.
And ideas ??
Race Director
Joined: May 2012
Posts: 15,768
Likes: 3,283
From: Phoenix area, AZ
Okay so for the past week I've noticed that my FRC has been dropping the idle down from 700-ish to under 500 when I come to a stop. Almost as if it wants to die out and then comes back.
Once I get going again and come to the next stop it does the same thing over again. This is getting pretty annoying. Should i have it checked out at my local dealership ? ( I have a buddy that works there)
OR is there something I can do to fix this ?
Car has new plugs and wires. I cleaned the K&N filter about 3 months ago.
And ideas ??
Once I get going again and come to the next stop it does the same thing over again. This is getting pretty annoying. Should i have it checked out at my local dealership ? ( I have a buddy that works there)
OR is there something I can do to fix this ?
Car has new plugs and wires. I cleaned the K&N filter about 3 months ago.
And ideas ??
You also need to check and see if you have any codes popping up when this is happening.
Racer
Joined: May 2014
Posts: 278
Likes: 0
From: Gering Nebraska
Do you have any codes? Mine was doing this and found moisture in the TAC module wire connections but mine was also throwing codes P1220, P1221 and P1518, would sometimes even die when coming to a stop. Engine would also derate at times.
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 5,892
Likes: 47
From: Helotes TEXAS
The "check engine" light just came on today on the way home from work.
I'll check for codes tomorrow as well take apart the CAI system and clean the MAF and TB as mentioned.
Thanks guys !
I'll check for codes tomorrow as well take apart the CAI system and clean the MAF and TB as mentioned.
Thanks guys !
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 5,892
Likes: 47
From: Helotes TEXAS
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Burning Brakes
Joined: Jun 2010
Posts: 1,014
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From: Rockwall TX
Was it running ok before you put the new plugs and wires on, if so, you may want to revisit the plug wires just to make sure they are secured on the plugs. Also, make sure the intake system does not have any leaks where they connect.
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 5,892
Likes: 47
From: Helotes TEXAS
And thanks a bunch for your input !!
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 5,892
Likes: 47
From: Helotes TEXAS
Cleaned the maf yesterday and the tb (without removing it from the intake), drove the car this morning and it still has the same idling issue... thinking about removing the tb from the intake and giving it a complete cleaning.... maybe this will solve the issue.
Safety Car
Joined: Nov 2002
Posts: 4,394
Likes: 6
From: Melbourne FL
If you did a decent cleaning of the TB attached; it won't make any difference by removing it. I spray it a couple times with it closed then used a clean rag or paper towel to wipe off any stubborn areas. Then I push the throttle blade open with one hand and spray the backside and the lower TB area again and wipe those areas with a clean rag as well. The lower areas of the blade and housing are what seem to have the most gunk on them. If you clean that area well then you are done. Removing the TB housing will not produce any better results. Have you investigated for vacuum leaks??
Pro
Joined: Sep 2004
Posts: 688
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From: Long Beach SoCal
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 5,892
Likes: 47
From: Helotes TEXAS
If you did a decent cleaning of the TB attached; it won't make any difference by removing it. I spray it a couple times with it closed then used a clean rag or paper towel to wipe off any stubborn areas. Then I push the throttle blade open with one hand and spray the backside and the lower TB area again and wipe those areas with a clean rag as well. The lower areas of the blade and housing are what seem to have the most gunk on them. If you clean that area well then you are done. Removing the TB housing will not produce any better results. Have you investigated for vacuum leaks??
I was also considering the possibility of the throttle position sensor going bad.
The car has been dropping to below 400 rpm when I come to a stop at a light and today it finally turned off on me !! This is driving me NUTS !!
Sinister-1, I'm having the exact same issue as you. I've also noticed a voltage drop when it happens, maybe from 13.9 to 13.0v and then it rises quickly. I have had the engine stall though and like you, don't know the cause. I'll be following along for a solution too, thanks for your post..
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 5,892
Likes: 47
From: Helotes TEXAS
As a matter of fact after I drop the hammer on it, it kind of clears ups for a good 15 minutes or so....