bad coil pack
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bad coil pack
I posted this as a reply to another thread (I'm new here) and realized that a new thread would be higher traffic... anyway....
I have a '98 F 150 w/ 5.4 at 99,600 miles. I just replaced 6 plugs last night and had my mechanic replace the remaining 2 today that I did not have the patience to do. It ran great all day and on my way home from work, I tromped on the gas and one of the coil packs cut out. Shortly after, the check engine light kicked on and I went to Schuck's auto parts to use the free scanner. The code I have is a freeze code of P0357 ignition coil G primary / secondary circuit malfunction.
Can anyone tell me what is the easy / primative way to test what cylender coil has failed? Will unplugging the injector wires one by one help isolate the cylender affected? The only reason I opt for injector wires is that it seems to be easier to disconnect them vs. the coil harness wires.
Thanks,
Brendan
I have a '98 F 150 w/ 5.4 at 99,600 miles. I just replaced 6 plugs last night and had my mechanic replace the remaining 2 today that I did not have the patience to do. It ran great all day and on my way home from work, I tromped on the gas and one of the coil packs cut out. Shortly after, the check engine light kicked on and I went to Schuck's auto parts to use the free scanner. The code I have is a freeze code of P0357 ignition coil G primary / secondary circuit malfunction.
Can anyone tell me what is the easy / primative way to test what cylender coil has failed? Will unplugging the injector wires one by one help isolate the cylender affected? The only reason I opt for injector wires is that it seems to be easier to disconnect them vs. the coil harness wires.
Thanks,
Brendan
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I found the problem... after spending $60 on a coil pack that I did not need. The wire connector on cylender #7 was hanging on by a hair. After I plugged it in all the way, it ran great and I cleared the trouble code.
It is ironic that the cylender that failed was one of the ones I had my mechanic change plugs on. All 6 that I changed were fine
It is ironic that the cylender that failed was one of the ones I had my mechanic change plugs on. All 6 that I changed were fine
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From: Long Island USA
Originally Posted by brenem42901
It is ironic that the cylender that failed was one of the ones I had my mechanic change plugs on. All 6 that I changed were fine
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