Stalling when lifting throttle
Thread Starter
Racer
Joined: Oct 2001
Posts: 304
Likes: 0
From: sometown new york
Stalling when lifting throttle - Fixed I think
My 99 is stalling when I lift my foot off the throttle. It happens when lifting after cruising, accelerating or coasting. The RPMs drop way low and the car dies. I can feather the throttle and keep it running. I can get the RPMs to stablize and the car will idle at 350-400. After 15-20 seconds, the idle pops back up to the normal 750 RPMs.
This all started after I disconected the battery for about 7 days. Everything else works fine. I figured it would have worked itsefl out by now, it's been a week. I've even tried disconnecting the battery to reset the computer. No luck. Any ideas?
This all started after I disconected the battery for about 7 days. Everything else works fine. I figured it would have worked itsefl out by now, it's been a week. I've even tried disconnecting the battery to reset the computer. No luck. Any ideas?
Last edited by connellyh; May 31, 2006 at 03:48 PM. Reason: problem possibly solved
Thread Starter
Racer
Joined: Oct 2001
Posts: 304
Likes: 0
From: sometown new york
There are no codes, no air leaks, no vaccuum leaks, no loose wires. Another thing I've noticed, when I come to a stop the RPMs jump back up to 700ish within 1-2 seconds. When I first start the car, it idles at 900 RPMs and slowly falls down to 700ish.
Here is the sequence of events:
car ran fine - disconnected battery - car sat for 1 week - reconnected battery - stalling problem.
Nothing else was touched. The reason I disconnected the battery is because I have the dreaded phantom battery drain and the battery will loose all of it's charge if it sits for a week.
Here is the sequence of events:
car ran fine - disconnected battery - car sat for 1 week - reconnected battery - stalling problem.
Nothing else was touched. The reason I disconnected the battery is because I have the dreaded phantom battery drain and the battery will loose all of it's charge if it sits for a week.
Burning Brakes
Joined: Jan 2006
Posts: 1,226
Likes: 45
From: Castleton VA
Cruise-In VIII Veteran
Originally Posted by connellyh
There are no codes, no air leaks, no vaccuum leaks, no loose wires. Another thing I've noticed, when I come to a stop the RPMs jump back up to 700ish within 1-2 seconds. When I first start the car, it idles at 900 RPMs and slowly falls down to 700ish.
p.s. I've assumed that you've checked and there's no problems with the throttle position controller harness -- a Q that came to mind when you talked about working on the battery, as the controller is right there below the battery, in front of the engine module.
Last edited by mneblett; May 30, 2006 at 06:42 PM.
Thread Starter
Racer
Joined: Oct 2001
Posts: 304
Likes: 0
From: sometown new york
I think I found the problem, dirty throttle body. I guess the computer had compensated for the gradual build up of crud and when I disconnected the battery, it lost the learned compensation. On just 2 litle short drives, the car didn't stall. RPMs never dropped below 600. The moral of the story is "Always look for the free and easy fix first."
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