How do I test coil packs?
#1
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How do I test coil packs?
I got the dreaded P1399 code and I'm just beginning on the journey to figure out what's wrong. I started searching the threads for P1399 and reading the info. I'll pull the plugs shortly but they were changed about 30-40k ago, have 160k on the car now. I want to test the coil packs but how can I test them other than switching w/ another one (moving pack in cyl1 to cyl4, etc.)? Is there a way to test them with a multi-meter?
#2
Here's what Billman recommended.
Here's the misfire thread as well. Unfortunately it's a bit harder to troubleshoot until you get a specific cylinder to code.
It's commonly recommended to check the valves. With your mileage you have either already done a couple or are badly in need of an adjustment.
It's commonly recommended to check the valves. With your mileage you have either already done a couple or are badly in need of an adjustment.
#3
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Thanks Matt.
An update...I pulled all the plugs and looked at them. They all looked fine so I put them back in and started it up and still got a misfire. Put the CLE reader back on it and got a P302 (misfire in cyl 2). So I swapped out the coil pack from cyl 2 with one from cyl 4 and it pulled a P304 and P300 (general misfire) so I'm hoping it's just an issue w/ coil packs. We shall see what happens after I replace them.
An update...I pulled all the plugs and looked at them. They all looked fine so I put them back in and started it up and still got a misfire. Put the CLE reader back on it and got a P302 (misfire in cyl 2). So I swapped out the coil pack from cyl 2 with one from cyl 4 and it pulled a P304 and P300 (general misfire) so I'm hoping it's just an issue w/ coil packs. We shall see what happens after I replace them.
#5
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Changing the coil packs seemed to do the trick. It immediately ran better and the CEL didn't blink although it did come on and stayed lit. I cleared the CEL and let it run for a while then put the code reader back on and no codes came up. Crossing my fingers that's solves the problem permanently.
#7
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