Voted Best Answer
Nov 07, 2022 - 05:20 AM
Hello - Sounds frustrating! Most vehicles won't generate a code if not at operating temperature as the baseline even where a misfire is happening. If not getting any codes yet I'd start least invasive and verify fuel filter, fuel line pressure & compression if you can. You're vehicle ECU per se assumes all 3 are in correct range when starting at a cold temp.
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