Stalls while accelerating

[xxloaf]

Hey all,

Ive been having a bit of trouble with my explorer('99 4wd 4.0 SOHC Sport)

It seems when ever it is up to normal(middle of the gauge) temperature as soon as I press on the gas it bogs out and almost stalls, but as soon as I let up my foot it comes back to life. At that point it is almost impossible to drive, I have to idle every wheres until it cools down and starts running again.

I changed the fuel filter first off( it REALLY needed it, black sluge poured out of the tank side of it), but that didnt seem to make a difference. I checked my plugs/wires/ignition coil, nothing seems amiss there either.

Ive been suggested everything from the catalytic converter to the fuel pump or O2 sensors.

Im kinda at a loss of what to try next.

One thing I noticed while driving it today is that the temperature reading seems to be real funny. I was only driving it for about 5 mintes(no warm up time, sitting all night) and the needle was up to the middle of the gauge already, but then all of a sudden it jumped back down to the "C" cold mark, not sure what that means, if anything, just something I observed.

Im up for any suggestions, or tips at this point

 

[xxloaf]

Just took it for another drive and again it seems very temperature dependent. Its only about 35 out today and it was very difficult to me to get it to stall out, I was only able to after sitting at a stop light for a couple minutes.

I had someone else take a quick look at it today and they think the fuel pump too, I guess Im going to start there and see how that goes.

 

[scucci]

Have you ever changed your thermostat? Some of those symptoms sound like a stuck t-stat. over temp does'nt always show as very high on the temp gauge. The pcm puts it into limp home mode(engine protection mode) and this causes loss of power, poor shifting and usually high Idle rpm. Just a thought

Scucci

 

[9explorer9]

Im having the exact same problem same explorer sport and somebody told me that it probably blew the lower intake seal so im working on fixing that so ill let you know if that changes anything