94-04 v6 models had problems with headgaskets blowing and leaky exhaust manifold gaskets, and the coil on plugs as well. all i can really think of aside from people drivin them hard and breaking stuff
actually 94-98 had the problems with head gaskets, 99-04 engine was refined to not have that issue. the 99-04s are definantly known for exhaust manifold leaks due water dripping from the a/c unit onto the cast manifold. As far as everything else goes the 99-04 mustangs are very sound both drivetrain and engine wise. The 94-98's had many problems thats what happens when you redesign.
and i know for sure that at least 99-04 has coil pack not coil on plug so no issues with that. I know the 4.6L v8s have coil on plug though so thats a thought.
I have a 2000 V6 and don't drive it hard, I bought it with 60000 on it and at 94000 it broke a valve spring, Polished the piston and rebuilt both heads and it really made a difference in power and gain 3-4 mpg. I'm getting 20 to 22 mpg
My 2002 Mustang V6 is at 81,600miles. I bought it used a few years back and it's been a good car. I recently got a "Check Engine" light plus it began idling rough & hesitating while accelerating. No knocks or other worrisome noises. I suspected a stuck EGR valve & computer code verifies EGR issue. I'm afraid to bring it to a mechanic because I know that even if it just needs to be cleaned, they will say it needs to be replaced and charge me a mint. I don't know a reliable mechanic and have a distrust of them due to previous experience. I used to do my own basic repairs, but after breaking my back in 6 places, that's no longer an option. At least I can still walk, though.
I would like to add to my previous post that I live in Minnesota and of course, it snows here. Since Mustangs are RWD and are relatively light in the back, they don't do very well in the snow. I found a solution but you still need to know how to drive in bad weather: Put roughly 250lbs of sandbags in the trunk. It will take up much of the room and you need to have a strong back, or help, to put it in, but it will give you enough weight in the back to keep you moving. You still need to accelerate slowly from a stop in order to get moving, but it's much better than spinning your tires and not getting anywhere.
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