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AP1 Misfire Once Again

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Old Jan 4, 2018 | 07:08 AM
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Default AP1 Misfire Once Again
What’s up guys I’m having 4 codes:
61-1 Battery Voltage malfunction
P0301 cylinder 1 misfire
P0302 cylinder 2 misfire
P0304 cylinder 4 misfire

I already dealt with this issue in the past and replaced spark plugs with OEM, OEM coil packs, and eventually had my head rebuilt at Inline Pro. They rebuilt with an AP2 head/valvetrain, Inline Pro TCT, this was done at 99k. The car now has 113,800k and no CEL has came on until yesterday when the car was idling. Never mis shifted the car, oil level is always checked and to spec. First thing to start with this process all over again is a compression check I guess...


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Old Jan 4, 2018 | 08:55 AM
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Based on the first code I would suspect your battery and/or alternator
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Old Jan 4, 2018 | 10:47 AM
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Originally Posted by afzan
Based on the first code I would suspect your battery and/or alternator
+1 not getting enough voltage to the sparkies/coils.
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Old Jan 4, 2018 | 02:46 PM
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Originally Posted by afzan
Based on the first code I would suspect your battery and/or alternator
I'll take it to Advanced Auto to get my battery tested and see if thats it, fingers crossed
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Old Jan 4, 2018 | 02:47 PM
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Originally Posted by HawkeyeGeoff
+1 not getting enough voltage to the sparkies/coils.
Hopefully its as easy as the battery, will get it checked tonight.
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Old Jan 4, 2018 | 02:48 PM
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Side note that the weather in Northern Virginia currently is below 10degrees
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Old Jan 5, 2018 | 08:57 AM
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I had my battery, alternator, and starter checked and everything came back normal. Deciding the next steps
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Old Jan 5, 2018 | 09:10 AM
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Do you have the flickering dash? If the rectifier isn't working properly the alternator can check out and still be faulty.
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Old Jan 5, 2018 | 09:54 AM
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Originally Posted by Slowcrash_101
Do you have the flickering dash? If the rectifier isn't working properly the alternator can check out and still be faulty.
Nope no flickering dash, in the morning it does seem as if the car starts slowly like the battery is weak. But everything checked out
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Old Jan 7, 2018 | 08:59 PM
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I would recommend reading the Misfire thread on here. There are a whole number of things that can cause misfires and that thread goes into a good amount of detail.
I've personally seen bad coil packs and injectors so it is possible that something else may have failed. See if you can substitute parts with a local?

That voltage malfunction sure is peculiar though.
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