ctownintegra

Wife called from 45 miles away from home, said it felt like she hit a brick wall, that there was an instant loss in power. I drive there, crank it and it sounds like it is running on 3 cylinders. I check the code and get a P1399 - Random Misfire, no other codes, just the P1399.

I thought maybe it was the cat, but it will rev all the way up and down, but rough. It will drive 70mph, just takes a while to get there.

Cap and rotor were fine, going to pull the plug in a moment,

Wires were also fairly new.

Ideas?

ctownintegra

Changed the plugs, got 3 more codes now.

P0301 - Cyl 1 Misfire
P0303 - Cyl 3 Misfire
P0300 - Random / Multiple Cylinder Misfire

Going to possibly try a dizzy tomorrow.

skaternak

any oil on plugs? gapped properly?

skaternak

correct fuel octane? cause i was using 89 in my d16 and went to 87 cause low on money. that whole time i had 87 in my car bogs runs rough and misfires (sometimes). deff change cap and rotor to be sure

ctownintegra

No oil on plugs. Using the same brand/octane gas I have had since day one. New cap, rotor, wires. Now it won't idle. fluctuates between 1k-1.5k with the check engine light flashing, and misfiring like a big dog.

skaternak

I GOT IT!!! i hope, lol. check the coolant level, and bleed it.

optionRej6

theres like a lil gasket of rubber inside the plugs for the fuel injectors take it out from the one that the cylinder doesnt have any spark thats what happened to me when i had an ls try it maybe it will work

ctownintegra

PROBLEM FIXED!

Checked the resistance on the wires, 7kOhms on the shortest one.....bad
Pulled cap, then coil....coil had a crack in it and was arcing out of the casing.

New MPI coil, new BWD wires from o'reilly's and we are back on the road with all 4 cylinders!