Help with misfire
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fuel filter was changed when i bought the truck, ive put about 10,000 miles on it. when i bought the truck i did all fluids, plugs, clean all the fuel injectors and intake. ill look around for vacuum leaks.
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From: Mt. Holly Springs, PA
A good plug will give you an open or infinity. Bad ones will give you any resistance reading. Just a note... you can also do this without removal of the plugs.
***DISCLAIMER***
because you dont find a bad one with the resistance check doesnt mean there is not a bad electrode in there...
Hope this helps
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ok so ill try that to. its dark and chilly here so I am going to stop for tonight, I've been running in and out from my truck to try and do ideas that are brought up. MAF sensor looked clean but I cleaned it anyways. (very gently) cause that little wire on it is SMALL!!!
I was reading through 2003 f250's posts during his problem and I noticed someone mentioned about moisture in under the COP boots. I had moisture under the ones I checked but didn't even consider it cause I was thinking about other things, like don't break my injectors. We have had really high humidity here lately, could the moisture under the boots be the problem?
I was reading through 2003 f250's posts during his problem and I noticed someone mentioned about moisture in under the COP boots. I had moisture under the ones I checked but didn't even consider it cause I was thinking about other things, like don't break my injectors. We have had really high humidity here lately, could the moisture under the boots be the problem?
Posting Guru
Joined: Sep 2011
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From: Mt. Holly Springs, PA
ok so ill try that to. its dark and chilly here so I am going to stop for tonight, I've been running in and out from my truck to try and do ideas that are brought up. MAF sensor looked clean but I cleaned it anyways. (very gently) cause that little wire on it is SMALL!!!
I was reading through 2003 f250's posts during his problem and I noticed someone mentioned about moisture in under the COP boots. I had moisture under the ones I checked but didn't even consider it cause I was thinking about other things, like don't break my injectors. We have had really high humidity here lately, could the moisture under the boots be the problem?
I was reading through 2003 f250's posts during his problem and I noticed someone mentioned about moisture in under the COP boots. I had moisture under the ones I checked but didn't even consider it cause I was thinking about other things, like don't break my injectors. We have had really high humidity here lately, could the moisture under the boots be the problem?
the simple answer is yes it can, but without seeing it Its impossible for us armchair quaterbacks to say for sure.
Mark
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From: Mt. Holly Springs, PA
Mark
Posting Guru
Joined: Sep 2011
Posts: 1,076
Likes: 0
From: Mt. Holly Springs, PA
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Well have driver side of the Engines fuel system ripped apart. Nothing way out of the ordinary. Plugs all showed open continuity. What's resistance on my injectors and coils supposed to be? My plugs are all NGK Iridiums and they look fine. I'll take pictures and post em.
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From: Mt. Holly Springs, PA
coil packs can be between 5000-15000 ohms. I would look for one that is different from the rest. since this is an intermitient problem, they may test fine. coil packs can be influenced by engine heat and only act different when at operating temps... we have in the past used a hot plate to try and replicate these intermitient faults that were thought to be affected by heat of the engine. If the plugs are out do a resistance check on the plugs again, this time from the tip where the wire attaches to the tip of the electrode. again look for a different reading from the majority.
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Well I can't figure out how to upload pictures, it's asking for a hyperlink. Hmmm. But I also did plugs from the contact where the wire attaches to the little electrode tip and it still read open, which didn't seem right, but that's what I got and tried many times on all of them. All of my injectors are right around 15.0 ohms.
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From: Mt. Holly Springs, PA
Well I can't figure out how to upload pictures, it's asking for a hyperlink. Hmmm. But I also did plugs from the contact where the wire attaches to the little electrode tip and it still read open, which didn't seem right, but that's what I got and tried many times on all of them. All of my injectors are right around 15.0 ohms.