96 avenger driver me crazy, starts fine and runs great for 5 miles, no smoke, trans shifts fine. After that it stumbles and stalls, (fault code PO300 random cylinder misfire) replaced computer and same problem. Its starts right up again if you let it sit about 20 mimutes.

96 avenger driver me crazy, starts fine and runs great for 5 miles, no smoke, trans shifts fine. After that it stumbles and stalls, (fault code PO300 random cylinder misfire) replaced computer and same problem. Its starts right up again if you let it sit about 20 mimutes.

I'm guessing the fuel pump. It's on its last legs and only works when cold.

P0300 - Multiple Cylinder misfire. Could be fuel pump. check for pressure after it dies. Another known problem , if it is a 2.5L, is the ignition coil.

still no luck, i have changed the fuel pump, fuel filter, distributor, computer, crank sensor and asd sensor. still have po300 fault code error ( random misfire) and (po301) and (po304) first cylinder and 4th cylinder misfire.
this whole mess started 2 weeks ago, car started to misfire while driving home the tranny was going at the present time. so i changed the tranny and it shiftes fine but can only get it to run for 5 to 6 miles at the most. then she just misfires and mil light flashes. what the hell have i missed? :disappoin:disappoin:disappoin

sorry i forgot to add its for a: 96 avenger
2.5 L
auto trans /w od

The Coil Pack That You Bought, Where Did You Get It? We Have Had Problems At The Dealer With After Market Packs Being Faulty. The Dcx Unit Is Very Expensive ($1000) But It Works., If That Is Your Problem. Check All Other Avenues First. Are You Getting Coolant Mixed With Oil? Or Any Unusual Burn Patterns On The Plugs In #1 And #4? Hot Spots On Plug Wires? Anything?

rechecked all connections, and found the answer, picked up another cam sensor at the yard this time! popped it in and she's runnin fine. this was the 3rd on i had put in. the orginal went with the old trans and the second was new. sometimes the simplest thing are always the cause, anyway i have a few extra parts that would have costed me an arm and a leg for. thanks for all that helped here.:grinyes: