[86LXslow]

I have an 86 Mustang LX with the 3.8L V6. The car will start up and idle, but when you press on the gas it boggs and kills. I changed the fuel pump and that made no change. I'm thinking maybe fuel press regulator? Any ideas? Could it maybe be the throttle postion sensor? Or maybe the MAP sensor? I am stumped I know it's something simple,but I can't figure it out. Also since Ford uses non standard parts I can't put my fuel press gauge on it either because the fitting is smaller than normal. Help!

[Fordgazm]

Pull the plugs and figure out if your running rich or lean .

[kscoyote]

Originally Posted by 86LXslow

I have an 86 Mustang LX with the 3.8L V6. The car will start up and idle, but when you press on the gas it boggs and kills. I changed the fuel pump and that made no change. I'm thinking maybe fuel press regulator? Any ideas? Could it maybe be the throttle postion sensor? Or maybe the MAP sensor? I am stumped I know it's something simple,but I can't figure it out. Also since Ford uses non standard parts I can't put my fuel press gauge on it either because the fitting is smaller than normal. Help!

My guess is an EGR valve needs to be replaced.

It happened on an old car I had in college.

[lcurle]

EGR's are for people whom care about how much emissions they put into the air. I dont have an egr and I dont have a problem with mine. It sounds like to me you might have to get your hands dirty on this one. First I would check everything minor before digging deeper into the pot and trying to steal a quick fix. Sounds like you may have a clogged fuel line or injector or quick possible your TPS might be bad. it is an '86 and almost a classic (in 2006). Start checking everything, pull the spark wires and plugs and make sure your just not running on 3 cylinders or you have a clogged fuel filter, your car is carbed right...........if so the guess what, that has to come off as well, check everything I had a similar problem when I had my '78 mustang as well as my '90 LX.

[Tominator]

EGR's are for people whom care about how much emissions they put into the air.

Sorry, but you have no idea the purpose of the EGR system in a modern engine.

I don't have an egr and I dont have a problem with mine.

Lucky for you the computer in your system can overcome your shortcomings.

How the EGR works.

IMHO, a bad EGR valve would not show the symptoms you describe.

[lcurle]

Lucky for me my EGR is turned off from the EEC. And considering in a mustang it takes partial exhaust from the passenger side headger through the Pumps and throws is back into the Lower intake for reburn. Its a endless cycle that is a waste of air displacement in my books, but hey what do I know, right!

[Tominator]

But it also cools the combustion chamber and helps prevent detonation......but, hey, what do I know?

Depends on the year and setup.

[lcurle]

Damn that hot air cooling method!!! And you dont have to really worry about detonation in a V6 to much