It has a rough idle most of the time in Drive or Reverse, when I am at a dead stop. The car idles fine when in Park or Neutral. It has a slight pause and feels like it is going to die when I give it gas from a dead stop. Please Help!!! Thanks.
2007-09-26 15:26:10 · 6 answers · asked by COLE P 1 in Cars & Transportation ➔ Car Makes ➔ Chevrolet
It is a Carb model.
2007-09-26 15:43:38 · update #1
I own a shop, and can think of a couple of reasons for the hesitation. Look for the obvious first, such as a vacuum hose split where it plugs on, fell off, doesn't fit tight & leaking, cracked, or missing, and collapsing due to being worn out. The carburetor may have a worn out accelerator pump, and needs a rebuild. A plugged up fuel filter, or air filter can do this too, as well as a sticking EGR valve. The vacuum cannister on the distributor may be bad, and/or not hooked to the correct vaccum supply. It should have vacuum come on it when you mash the gas pedal. If not, then its hooked to the wrong source, and should be hooked to a ported vacuum source that has vaccum when you mash the gas pedal only. Check the cannister on the distributor by using a good hose, and suck on it to see if it will move, and hold vaccum. If not then that is probably the problem. Look inside the carburetor with the engine off, and work the throttle. When you first move it, it should squirt fuel inside the carburetor instantly, if you have to move it a little ways before it squirts, then the pump is bad or needs adjusted. Finally, you can suspect the igniton timing is too low, and needs to come up about 3-5 degrees to take away the hesitation. I would also suggest a new set of spark plugs.
Glad to help out, Good Luck!!!
2007-09-27 02:34:03 · answer #1 · answered by Anonymous · 0⤊ 1⤋
It sounds like you have several performance issues (with the car) I would never try to diagnose a problem over the phone or Internet. I would insist on doing a complete diagnosis with an engine analyzer and a good scan tool. First, you have to start by test driving the vehicle to verify your description of symptoms, then a thorough visual inspection of the hoses and sensor connections etc., I would test the ignition system and engine compression if I found a cylinder not performing as expected. Then I would analyze the on-board computer data to see what's going on and see if there are any codes stored in the computer. I would use the service manuals to follow the manufacturer's procedure for diagnosing the codes found (if any). By that time I could have a pretty good idea of most of the problems with your car.
Anybody can give you suggestions but without doing a complete diagnosis it's only guesswork. I don't believe in replacing parts until the problem goes away. I believe in finding the cause first, fix the cause then fix the results of the failure then verify the fix.
You may have several issues going on, is there a "check engine" or "service engine soon" light on while the car is running? Or is the light inoperative?
You really need to take it to a good mechanic that has all the proper tools and equipment to diagnose the problem and will follow a good diagnostic strategy.
2007-09-30 11:43:30 · answer #2 · answered by Older1 4 · 0⤊ 0⤋
When a car is in drive or a force is needed and trouble occurs one might want to explore the avenues of fuel delivery,or its ability to be burned in the combustion chamber itself.
Fuel filter,clean injectors,have it checked on a computer tester.
Has this car ever had it's transmission fluid changed and if so was a new filter installed?
Have you checked your spark plugs?Are your ignition wires old?A new distributer cap is cheap too.
These are all cheap ways to troubleshoot a problem.
But I always start with a new fuel filter as its the best thing for an engine and its always cheap.
2007-09-26 15:47:00 · answer #3 · answered by extitude 5 · 0⤊ 1⤋
Make sure that the centrifugal advance weights are not binding in the distributor. You can check this easily with an adjustable timing light or by inspection of the distributor.
2007-09-26 16:36:05 · answer #4 · answered by Anonymous · 0⤊ 1⤋
I had a car like that. Turned out it was the "float" in the carburetor. Worth a look, if you have a carburetor and not fuel injection.
2007-09-26 15:30:24 · answer #5 · answered by Yner 3 · 0⤊ 1⤋
You are right at the change year. Do you have carb or injection ??
2007-09-26 15:38:40 · answer #6 · answered by tronary 7 · 0⤊ 1⤋