I've been having an extremely frustrating situation on my hands with my 1988 Taurus GL Wagon and was hoping you could help. The car is a 3.8L Essex with approximately 90K miles. Has treated me very well up until now.
For the past month or so, the car has had trouble accelerating after startup. It will hesitate like crazy when I press the accelerator right after I let the engine reach normal operating temps. I really have to mash the throttle to get it to go anymore... you can hear the engine going "chug chug chug" especially at low RPM's. But the weird thing is that after driving for a few minutes, the problem will go away completely and the car will run perfectly.
This problem wasn't a big deal at first but has gotten progressively worse, at at this point it drives so poorly I want to drive it off a cliff. I took it to the Ford Dealership to have it diagnosed and they didn't find anything. The check engine light does not come on. I have replaced the IAC valve, the EGR sensor, the MAP sensor, fuel filter, air filter, PCV valve, and checked the spark plugs, distributor and rotor. The spark plugs are less than a year old. Everything is fine in those areas. But $300 later I haven't progressed a bit - and I really hate to spend any more of my college money on a car that's hardly worth a grand anymore. And I really don't want to buy another car. Very frustrating.
Does anyone know what could possibly be wrong with it? Sorry for the long post.