98, 4.6, misfire on acceleration
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Check fuel pressure.
Make sure you have MOTORCRAFT plugs ONLY in that engine.
Go over all ignition connections.
Clean MAF.
Suck test EGR valve.
Check PCV valve/ -Motorcraft valve only for that one.
Check your CATS for abnormal heat crackling and glowing at night.
Also, check out your wiring harness in relation to your AC accumulator. The wiring harness can sink resting on top of your accumulator connector. Over time this may bare a wire or two, but it doesn't necessarily have to do this to cause a problem. Your accumulators mag field can disrupt/cause havoc to your vehicles ignition.
So check the wires in that area, -and tie your harness back and away from the AC accumulator.
Make sure you have MOTORCRAFT plugs ONLY in that engine.
Go over all ignition connections.
Clean MAF.
Suck test EGR valve.
Check PCV valve/ -Motorcraft valve only for that one.
Check your CATS for abnormal heat crackling and glowing at night.
Also, check out your wiring harness in relation to your AC accumulator. The wiring harness can sink resting on top of your accumulator connector. Over time this may bare a wire or two, but it doesn't necessarily have to do this to cause a problem. Your accumulators mag field can disrupt/cause havoc to your vehicles ignition.
So check the wires in that area, -and tie your harness back and away from the AC accumulator.
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From: Joplin MO
There is no change interval for fuel injectors.
I see Autolite plugs in that pic - you should not be using them, they do not meet Ford heat range specs and they do not last. What brand wires is on it?
I see Autolite plugs in that pic - you should not be using them, they do not meet Ford heat range specs and they do not last. What brand wires is on it?
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When I did I noticed that some of the boots were off the plugs, loose/.
When I changed them, I ran her for about 3 miles and let her sit to do the #8 and when I did I noticed the boot was off another cylinder!~
I just did #8 and came back and the boot was off #4.
What wires do you reccomend for this truck, motorcraft also????
thanks for replying
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From: Joplin MO
They look pretty generic to me. If the boots keep popping off, they are junk. Are you using dielectric grease?
Motorcraft wires recommended - I think they are about 70 bucks or so at rockauto.com.
Motorcraft wires recommended - I think they are about 70 bucks or so at rockauto.com.
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yes I did use the grease, is that a bad idea? I will pick up some motorcraft wires and install them. thanks for the help. kevin
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From: Joplin MO
No, you should be using the grease. Don't overdo it - just smear a little bit inside the boot. Make sure the connector engages the plug terminal fully, I'd think you would hear a click when it bottoms out.
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Thanks, i changed them just now. its about 90 % better, a little lugging but nothing like before. I will get the engine light cleared and see what happens.
I will check the cats tonight when it gets dark. thanks for the help. kevin
I will check the cats tonight when it gets dark. thanks for the help. kevin