Each time I have to stop at a traffic light while driving, the acceleration on my car will hover between .5 and 1. When it gets close to .5, the car makes kind've a grumbling noise and it vibrates a bit. It goes away when the needle swings back closer to one....It will do this repeatedly for as long as I am stopped. Anyone have any ideas?
2006-10-13 05:35:21 · 8 answers · asked by LG 1 in Cars & Transportation ➔ Maintenance & Repairs
I drive a 94 Pontiac Grand Prix
2006-10-13 05:35:49 · update #1
Need to adjust timing of your motor (idle RPM's). At idling RPM's should be over 500 RPM's near 1,000 RPM's.
2006-10-13 05:42:38 · answer #1 · answered by Handyman 4 · 0⤊ 0⤋
The torque converter clutch is failing.
I have a similar problem with my 95 Grand Am V6. It's been like that for almost 6 years. Trouble code is stored in the computer for the Torque Converter Clutch.
If you drive it easy, it can last a long time. If you drive it hard, it won't last.
You would have to think hard about repairing it. It's not something you can easily replace in your driveway. You would have to decide if the condition of the rest of the car warrants paying a mechanic to replace it. $500-$1000
The car is Fuel Injected. The idle can NOT be manually adjusted. Idle is controlled by an electronic idle control air valve located in the throttle body. The idle control air valve is controlled by the computer. The responses about adjusting the idle speed, setting float levels apply to carbureted engines and will be of no help.
2006-10-13 12:58:48 · answer #2 · answered by Mad Jack 7 · 0⤊ 0⤋
Sounds like your car is having trouble maintaining idle. (I'm assuming you're talking about rpms and please note that there should be a x 1000)
Typical idle should be between 700-800 rpms for most vehicles at idle (.7-.8 for you)
It's trying to maintain that, but it swings back and forth because it can maintain it steadily. There are a variety of causes for this and would be too hard to diagnose over the internet.
It could be anything from a vacuum leak, to poor fuel pressure/injectors, to simply needing a tune up.
Those three would be the most likely scenairo. Simplest would be get a tune up first (plugs, wires, rotor, cap, and retimed if necessary), and try a few bottles of fuel injector cleaner down the gas tank. If those don't work, then you're going to have to search for a vacuum leak, or have a mechanic with a trained ear do it.
Good Luck.
2006-10-13 12:46:52 · answer #3 · answered by hsueh010 7 · 0⤊ 0⤋
You have a idle air control (IAC) valve that is sticking..Take it off and clean it with Berryman's B-12 spray. That should fix the idle problem. If you have a vibration coming from the floor, the torque converter may be going out.
Check all the vacuum hoses to be sure non are collapsed, cracked or unplugged. Hope this helps.
Master tech 40 years.
2006-10-13 13:32:31 · answer #4 · answered by Cal 5 · 0⤊ 0⤋
If it is carbureted the float needs to be set differently, if it is injected make sure you haven’t got an air leak. A vacuum leak will give both types of fuel systems fits. You might also see if having the idle speed set to about 800 instead of 500 and see if it straightens out the problem.
2006-10-13 12:43:36 · answer #5 · answered by george m 3 · 0⤊ 0⤋
sound like your timing is off,or your distributor cap have a crack or one of your spark plug are failure or vacuum line loose, the best thing you should do taking to mechanic for engine diagnostic that should will cost you around $50.00 for diagnostic i think that better than guessing.
2006-10-13 13:02:30 · answer #6 · answered by pvphelp 2 · 0⤊ 0⤋
i think theres sumthin wrong with your engine..check your head cylinder for cracks..i have a question, is your steering wheel when you stop,does vibrating??maybe thats the reason...check the engine..
2006-10-13 12:57:20 · answer #7 · answered by John Julio O 1 · 0⤊ 0⤋
TAKE IT IN FOR REPAIRBEFORE MORE DAMAGE IS DONE
2006-10-13 12:44:08 · answer #8 · answered by Anonymous · 0⤊ 0⤋