jstaz1993

Ok well iv had this 96 for about 5 months now. And what it is doing is when i start up the truck it runs fine no shaking runs like its brand new. But after it idles down or i drive it for a while the engine will shake not bad but u can fill it inside the cab. (like it misfiring) But i had she codes run and it was saying O2 sensors were bad, EGR valve was bad and it was saying mis fire on cylinder 3. So i get new O2 sensores and replaced them. New Spark plug wires, new distibuter cap and roter. Took the EGR valve off and did a vaccume test on it and it worked. So whats going on. Iv done every thing i can think of. I dont know what to do.

typersouth

The EGR Valve Position sensor might be a place to look. Also if the tube for the EGR is damaged it can cause it to run bad. It happened on my 90'. I threw EGR codes and it was the tube from the manifold. Also you said you got new plug wires. Did you do the plugs. Thats the first place I look at when things aren't running right. Hope this helps.

jstaz1993

yea when i first got the truck that's the second thing i did is put new plugs in. and ill try those thing ill try and update you.( just to ask where is the EGR Valve Position sensor at)

Good old Bill

The EVP sensor is bolted on top of the EGR valve. Just because the codes say different, don't overlook checking for vaccuum leaks, especially at the elbows to the PCV valve.

dirtcrew51m

The miss might also be a bad injector.

jstaz1993

umm i gont notinh on top of my EGR valve .

Good old Bill

Just looked at wifes 96, 5.0 Explorer, her EGR valve is aft of engine behind air intake plenium, EVP is between valve and firewall. Guess the F150 installation is different.

87Ford

yeah im going with bad injector most deff cause if u did the tool scan and it came up cyl 3 problem it prob means injector or even just something wrong mechanicaly with that cyl i would start like the others said sensors and valves first cause an injector will run u 100