My car keeps turning off when i slow down or at a red light, then i can turn it back on. What could it be?

Answer 1

Honestly, we would need a crystal ball to answer your question.

If your going to ask a question like this, you need to tell us everything. Year, Make, Model, Engine, Symptoms, Hot or cold, automatic or stick shift... etc.

Answer 2

The IAC is an electric motor that opens and closes an air passage, so it is really an electricaly controled vacuum leak. Too much of a leak causes a high idle and too little of a leak causes rough idle and stalling. How do you think that you "messed up the IAC valve position"? Why did you replace the TPS?
The first thing that I would do is disconnect the battery for about 30 seconds. Then start it up and see how it runs.
If it still runs rough at an idle, check for vacuum leaks around the intake. There may be a hose that came off when you pulled the intake the first time. If you cant find any leaks, I would suggest taking it in to the dealer to have it properly diagnosed.

Answer 3

It is likely to be idling too slowly, or vacuum leak or EGR sticking a bit. It is not likely to be carbureted unless it is very old or for off road use and adjusting the idle speed is harder to do on fuel injected cars, it is computer controlled so there are two things to check first. One is the throttle body bore for carbon you may be able to clean it with some carb cleaner on a rag try wiping it out around the throttle plate, I wouldn't blast cleaner into the throttle body as this may damage it. Second is the idle air control, It may be sticking as well, if you do not know about this you may want to pay someone to do it for you. If you find the right guy it will be the cheapest solution. Mistakes made here are not inexpensive.

Answer 4

If you're stalling when slowing down, it sounds like an idling problem. This could be a number of things. When's the last time it had a good TUNE-UP?

Points, plugs, carb adjustment. Also check the vacuum hoses for leaks. If you're going to be looking for answers to questions like this, you should own some diagnostic tools like a timing light and a vacuum guage.

GOOD luck.

Answer 5

We had a car part store called "Advanced Auto",i took my car by there,they have a hand held machine that they hook up to your car and it shows were the problem is.
I did this because my dealership wanted to charge an high price for a small part i needed.
I found out that a light which keep coming on, simply because i was not clicking my gas cap 3 times to make sure it no air was getting in it.
call around and see if a local car part store has this machine.it may find where the problem is!
Good Luck!

Answer 6

You mean it stalls and shuts off when you are almost idling.
You have to start up again when the light goes green?
There could be a lot of reasons for this problem. It will progressively get worse so better bring it to the mechanic for check up before it stalls and never start up. At least it is still drivable now.

Answer 7

Sounds like a torque converter clutch solenoid. When those go bad it acts like your driving a manual trans and forgetting to push the clutch in when you stop. VERY common on GM cars.

Answer 8

I've had this problem before. In my case it was a combo event.

Bad seals on my air intake manifold and a deteriorated joint on one of the air intake hoses.

Upside, was only about $60 in parts. Labor killed me though.

Answer 9

Could be a lot of things...

probably...
fuel pump, fuel filter

Do you have a check engine light? If so, go to autozone and have them scan for a code for free.

Answer 10

you might need to adjust the idle
adjusting the idle up means it will get a little more gas when you take your foot off the accelerator, and it won't die