Missfire
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Mountain Pass
Joined: Oct 2002
Posts: 205
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From: Jaqcksonville
Missfire
Developed bad missfire with flashing cel light. I think I have bad gas/water in the tank. I had replaced the plugs and wires recently. Pulled codes P0301,P0304 out of it. I did an injector flush and added dry gas and octane booster and ran the van shuddering and all to E on the tank. Put 6gals of fresh gas in and still have that shudder. It is misfiring. Is it possible to have damaged the recent spark plugs under these conditions? I will change the fuel filter today.
Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
Ok, what engine. If you have the 4.0L, it uses coil packs, and one coil cylinders # 1 and #4. Test the primary and secondary resistance of the coil, and if it is not in specs, buy a new coil pack.
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Mountain Pass
Joined: Oct 2002
Posts: 205
Likes: 0
From: Jaqcksonville
No wires are autolite with autolite double plats. Engine ran fine until bad gas introduced I dont have the powertrain manual to test the coil however at $68 at Autozone a replacement coil I just purchased will elimanate the coil pack. Will let you know how it worked out.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
was the gas old, dirty or contaminated with water.
if yes to any above, time to pull injectors and have professionally cleaned, 2 are plugged/gummed up.
coil is not the problem. never seen a Ford EDIS coil pack fail, they're bullet proof except for connector corrosion
if yes to any above, time to pull injectors and have professionally cleaned, 2 are plugged/gummed up.
coil is not the problem. never seen a Ford EDIS coil pack fail, they're bullet proof except for connector corrosion
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Mountain Pass
Joined: Oct 2002
Posts: 205
Likes: 0
From: Jaqcksonville
Yes to all the above . I will put another set of plugs into it. They look pitted on the electrode when i took them out, I had a half tank of bad gas and ran it to the E. I cleaned the injectors with the Napa pressurised injector cleaner at 35psi today.I will have to wait to pull the injectors as I need to do a700 mile round trip this week. The coil I replaced did improve the miss however as you said the old one was probably ok.
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Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
fuel filter is probably plugged and gummed up from the bad gas also
Shell just had a refinery/tank farm problem here. forgot to add the octane additive and cleaner but I'm hearing it was worse than that. they had a pipeline pig fail and mix diesel with gas.
good luck with the miss.
i fought one all winter, finally found the cause this spring.
Shell just had a refinery/tank farm problem here. forgot to add the octane additive and cleaner but I'm hearing it was worse than that. they had a pipeline pig fail and mix diesel with gas.
good luck with the miss.
i fought one all winter, finally found the cause this spring.
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