Well i pull out of my shop today..i drive about 5 miles than i notice my truck is driving real weird..shift points are all screwed up..and it gets REAL sluggish..and the check engine light came on....so here are the codes I got

P0300-Random/Multiple Cylinder Misfire Detected
P0303-Cylinder 3 Misfire detected
P0304-Cylinder 4 Misfire deteved
P0307-Cylinder 7 Misfire detected

now what do you think could of caused it....and also when this happend i stopped at my friends house and disconnected the battery for 5 minutes hooked it back up..and the truck ran fine for about 15 minutes than it came back..so any suggestions??

 

anyone? and i also noticed if the truck is cooled..or you let it cool down it runs fine..only when it warms up.thanks

 

Possibly a bad ecu or something in the distributor, like the controle module.

 

anyway of testing these?

 

Did you feel the misfires, or did it just seem to be running sluggish? 15 minute thing is either pcm relearning bad info from a bad sensors or pcm transitioning from open loop to closed loop. Misfires are often caused from wet plugs due to rich condition. I would check map, iat, ect, and 02 sensors.

The next group buy on this forum should be a run of the mill scanner (not code reader). It is amazing what the pcm will tell you (in real time) just riding down the road. I guess owning one is kind of like a video game for older folks.

 

I'm showing my age cause I agree.

 

you dont feel it miss..just when it warms up it gets real sluggish..I mean before this whole thing happend i could put it in Nutral and rev it to redline..now when this happend when the truck warms up and i put it in nutral to rev it it could barely hit 3000..and sorry if this sounds dumb...but what exactly is the IAT and ECT?

 

no luck getting the O2 sensors off..them suckers are on there..I am going to have to drop the truck off at the local muffler shop and let them do it before i stripp the damn things lol...but i will let you guys know if it fixed the problem or not when i get them put on

 

ok truck got WAY worse..I mean when it warms up it wont even move now..you could push the gas pedal to the floor and nothin..but if you let her sit and cool down she is fine until she warms up again...idk if sensors can cause this or what>>any info?