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2000 XJ - Misfire 1 and 6 with Ignition Coil A Circuit

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Old 03-29-2024, 05:59 AM
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I think you need more definitively hard-data testing. You got a new coil(s), different PCM, wires maybe/probably good, so you need to either measure signal waveforms with the o-scope or assume they're good for now.

Focus on the injectors. Get the noid light or use o-scope. Yank em out clean em and check resistance. O-scope them too.

Pull plugs and let's see em.

Codes?
Old 03-29-2024, 06:06 AM
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Also measure CPS/CKS sync when you got all the stuff out.
Old 03-29-2024, 06:13 AM
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Might as well put up the O2 sensor waveforms as well (2 or 4?).
Old 03-29-2024, 03:14 PM
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Originally Posted by rdr8887
One long coil rail
Ah. Some of the rails, it's possible to unbolt the individual coils and swap them around.
Old 05-19-2024, 02:33 PM
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To not leave everyone hanging in suspense and in case this helps anyone in the future, I got it repaired. I doubted it was the PCM. So, decided it had to be in the wiring between the PCM and injector rail. I decided to try the plug first. Bought a new one with 6” of wire. Then cut off the existing plug and about 2” of wire. Spliced the new in. Cleared codes and fired it up.

She’s been back on the road about 15 miles and no issues.
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