95 Mustang GT idle issues

[Coyote12387]

I have a 95 GT with 51K miles. I have changed the plugs, wires, cap & rotor, IAC, and fuel filter. The car had a slight miss at idle, but does not miss while driving or accelerating. I checked the PCV valve and it appears to be working correctly. Lastly, the car will intermittently die after driving it for a period of time. Any suggestions?

 

[ttocs]

smoke check the vac lines to look for leaks. There are a few ways that show how to do it on youtube.

 

[Coyote12387]

That is something I have never attempted. Guess I can give it a whirl. I ordered a new PVC valve just to try it. The EGR is removed in the car, could that be causing my issues? I know most people remove those in these cars.

 

[evilcw311]

Doubt it’s the egr but I guess worth trying. As you said, most of us have removed them.

Dizzy is also a possibility. The pip sensor inside is notorious for causing random dying after driving for a while.


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[Coyote12387]

Would the PIP also cause the rough idle and misfire?

 

[evilcw311]

Would the PIP also cause the rough idle and misfire?

It’s possible. Mine would act up a little at idle but once I took off it was fine. After driving a bit I’d be moving along and out of nowhere it would just die like I had turned the key off.


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[evilcw311]

Is the dizzy and the coil original??


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[Coyote12387]

I’m not 100% sure, but the car only has 51k miles on so I would imagine so. The wires were original when I replaced them.

 

[evilcw311]

Coil is cheap. Only buy motorcraft. See if it helps possibly


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[Coyote12387]

Yeah I was thinking about changing that as well. I don’t think it’s an Ignition issue though because it doesn’t seem to miss when driving. It only does it at idle. Another thing I read was it could be a faulty injector. Car also seems to be running rich.

 

[evilcw311]

Yeah I was thinking about changing that as well. I don’t think it’s an Ignition issue though because it doesn’t seem to miss when driving. It only does it at idle. Another thing I read was it could be a faulty injector. Car also seems to be running rich.

Unfortunately a car that old with that low of miles could have lots of issues. It’s obviously sat around a lot over the years. It’s not easy on a lot of parts.

@ttocs who’s the guy you sent your injectors to for cleaning?? If this car isn’t a daily then you could get them serviced. Or maybe it’s a good time for an upgrade.


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[ttocs]

not sure why an injector would not work at idle and then work later in the rpm band.

 

[Coyote12387]

Yeah that’s the tricky part, I honestly have no idea what the issue is. Doesn’t miss at all while driving. Only at idle, will stall out on occasion after driving, and burns rich.

 

[07GtS197]

Op have you pulled and inspected the plugs? Checked the wires all over?


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[Coyote12387]

New plugs, wires, cap & rotor, fuel filter, and IAC.

 

[07GtS197]

But did you inspect the old plugs, they will tell you a lot about how its running.


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[Coyote12387]

I don’t remember that was a year ago, but I’ve only put 1,000 miles on the car since changing them.

 

[07GtS197]

Pull the new plugs and check them. They will tell you whats going on. And if there is a stuck injector it will show on the plug.


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[Coyote12387]

I can do that, what am I looking for?

 

[07GtS197]

Post up pictures of all them, we’ll help you read them. And keep note of what plug went in what cylinder.


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