I have a 02 Mustang GT that began to shut off when I stop at a light or put it in park with the engine running. When I first turn the car on everything seems fine but when it warms up and ive been driving for like 5min. it begings to idle rough and turn off. A shop recently replaced my IAC valve, intake manifold, a coil and the injectors because the car was put-puting and idled rough... it worked fine for about 2 months, untill now. Ive checked to see if I have any broken hoses but I cant see anything visible... Any Ideas on what this could be?
2007-12-13 16:45:39 · 13 answers · asked by CT 1 in Cars & Transportation ➔ Maintenance & Repairs
If you car runs fine while driving down the road, but runs rough or stops running while at a stop the main thing I would start looking for would be a vacuum hose leak.
What is happening is that the fuel/air mixture is off. At idle or lower speed there is more air than fuel being mixed because of the vacuum leak causing the engine to stall out.
That is why it runs fine as it warms up because the fuel mixture is richer, as the car warms up the fuel mixture decreases.
As you drive the car at normal speeds such as on the freeway, the fuel mixture increases bringing balance to the fuel/air mixture.
The vacuum leak in the hose is causing too much air to be added into the fuel/air mixture causing your engine to run lean while at an idle.
I have seen this symptom many times while I worked as a mechanic in shops.
To locate the leak get a can of carb cleaner. Have someone help you keep the car running while you squirt the car cleaner around the different vacuum hoses. When you spray a section of hose and hear the engine smooth out or the RPMs increase, that area is your problem. Keep squirting the area until you are able to locate the hose with the leak.
Remove the faulty hose, take it to the auto parts store. Spend about .50 cents on the hose and replace the new one where the old one was. Car should run much better now.
Additional Note: If you take to a shop and they place it on the computer and tell you that the Oxygen sensor is faulty, tell them to check for a vacuum hose leak. The computer will of course report a faulty Oxygen sensor because the vacuum leak is causing the fuel/air mixture to be off.
Hope this helps you out.
2007-12-13 17:06:03 · answer #1 · answered by selfrob 4 · 7⤊ 1⤋
This Site Might Help You.
RE:
Car idles rough and turns off while stopped?
I have a 02 Mustang GT that began to shut off when I stop at a light or put it in park with the engine running. When I first turn the car on everything seems fine but when it warms up and ive been driving for like 5min. it begings to idle rough and turn off. A shop recently replaced my IAC valve,...
2015-08-10 03:38:55 · answer #2 · answered by Duncan 1 · 0⤊ 0⤋
Car Idles
2016-10-15 23:42:06 · answer #3 · answered by ? 3 · 0⤊ 0⤋
For the best answers, search on this site https://shorturl.im/aw9dG
Rough idling comes from Water in fuel supply Dirty injectors Carbon build up in piston chamber use fuel system cleaner clogged fuel filter starving engine while idling at light.....lower engine rpm Bad gas Defective sensor Air filter restriction
2016-04-08 09:23:49 · answer #4 · answered by Anonymous · 0⤊ 0⤋
If anyone has a similiar problem & it wasnt a vaccum hose. Make sure the IAC valve is adjusted properly. But beware, I have seen" mechanics fix multiple items for 1 problem. $$$$, and when their done" pull a few vacumm lines, toward the end of their rail. IOW they know they will come off in a few wks or so, bringing you back to what I hear quite often " He's the Best Honest Mechanic" ...Ignorance is Bliss & Expensive. I work on my own....I've had shops tell me I need a new transmission......P.s. loosening vacuum hoses, has been around awhile
2014-06-12 13:55:39 · answer #5 · answered by Anonymous · 1⤊ 0⤋
you might have gotten some bad gas. Run the car untill it is as low as you can get it then get a can lf bg44k and put it in the tank and filler up. Other than that check the fuel filter.
Always start with the cheapest things first when trouble shooting.
2007-12-13 16:55:32 · answer #6 · answered by cpttango30 5 · 0⤊ 0⤋
Have you checked the oxygen sensor? Once your car heats up it could create issues if it's faulty. Or maybe the EGR valve?
2007-12-13 16:48:41 · answer #7 · answered by Anonymous · 1⤊ 0⤋
you will just have to go around checking the vaccum lines. Check the plugs to make sure they are not fouling. Check the wires, make sure the filter is clean.
Intake manifold replaced? Sounds like you got ripped off on that one
2007-12-13 18:19:13 · answer #8 · answered by Corey the Cosmonaut 6 · 0⤊ 0⤋
Just a guess...Fuel filter... very affordable, but can cause those types of trouble if it is clogged.
2007-12-13 16:49:50 · answer #9 · answered by blackpug6 2 · 1⤊ 0⤋
is the choke not releasing when the engine warms up
or is that the IAC valve you were talking about?
tinkerer tom
2007-12-13 16:49:59 · answer #10 · answered by tom4bucs 7 · 0⤊ 0⤋