missfire on #1
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New User
Joined: Oct 2005
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missfire on #1
I have a 98 f150 with a 4.6. i cut the cats out of it awhile ago. a short time after, my #1 cylinder was missfiring. i took the plug out, and the electrode was melted off. all the other plugs were fine. i replaced all the plug and wires, but it still misses on #1. every plug that i use in that cylinder, ends up to get black and wet with gas. I want to stat at the begining. first, what would cause my plug to melt the electrode?
Elder User
Joined: Nov 2001
Posts: 892
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From: Duluth, MN
If the plug is wet, it could be a sticking injector. Pull the fuel rail off on that side, but leave the injectors connected. Prime the fuel pump(place a paper towel under the row of injectors) and see if any of the injectors leak fuel out. With the system pressurized, no gas should leak out of any of the 4 injectors on the bank 1 (or bank 2 for that matter) side.
Edit:
And a coil pack does not have to misfire on all 4 cylinders to be bad. We see it alot on the windstars, that due to vibration and other factors, you will get an intermittant misfire on a hole. This can be traced back to a hairline crack on the underside of the coil pack for whatever cyl is missing.
Edit:
And a coil pack does not have to misfire on all 4 cylinders to be bad. We see it alot on the windstars, that due to vibration and other factors, you will get an intermittant misfire on a hole. This can be traced back to a hairline crack on the underside of the coil pack for whatever cyl is missing.
Last edited by Wilber15; Oct 31, 2007 at 04:15 PM.
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