Ok here is the deal,

My 02 expedition 5.4L E.B. ,Has had a few issues here and there , 1yr ago i replaced 2 coils and all 8 plugs and boots. and it has been reliable every since then NO ISSUES AT ALL . yesterday i drove all over the place and ran perfect got home had the A/C running but thats nothing new its hot as hell in florida :-) , anyways i jumped in this morning to take the kids to the beach ( keep in mind hasent been ran since yesterday) and as soon as i fired up the engine it started stumbling and did not want to run engine was cold still and it gave no warnings the previous day. anyways i milked the throttle until it would idle decent, and too off up the hwy for a test drive it seemed to run ok ,but it did have a little hesitation, so i floored it and kept it pegged to the floor until i was about at 88mph, then i let off the gas, turned around and went home, when i pulled in the driveway it was running fine, i got out with the engine runningand the A/C was still on too seemed okay, but it smelled hotfor a min or so,i chalked that up to running it so hard just prior to that. so at that point still had not gotten any CEL, I went to the gas station and filled my tank. As soon as i started it up the CEL and OIL Temp lights came on and the Water temp guage was pegged all the way in the red zone immediately , it felt like it was only running on 3 cylinders and it was so sluggish it took all it had to shift into the next gear. I made it home but it scared me ....have any of you had this issue? by the way it has 126,000 miles on it. i am gonna change the coolent temp head sensor tomorrow. but i hop a few of you Fellow Blue bloods can shed some light on this for me, .additional info when the issue came up and all the lights came on in the dash, i shut it down at the gas station and checked the oil it was fine , and the engine temp seemed fine no bubbling under the hood, and nothing out of the ordinary at all. do ya'll think it is just the cyl head temp sensor or somethin' more? helpme out please.

thankyou,
Clay

 

Could be a bad sensor. The missing is the PCM shutting down every other cylinder to help try to cool the engine down by just pumping air thru the cylinders.

 

I just purchased the new cyl head sensor today, it was 19 bucks at advanced,also i bought a new thermostat , and i plan to flush thecooling system for the hell of it. As far as i know thye cooling system has never been flushed. i have owned it for 3 yrs, oil changes are regular , and the tranny is brand new, i just need to focus on the interior and fixing little issues here and their.

Hey i got a question for ya'll , have you ever had to fix a blend door?