I recently changed the gasket for the air intake manifold and the valve cover myself which I've done plenty of times before without any problems until now. I got a check engine light on p0171 lean code and the engine surges at idle. I've checked for vacuum leaks, found one and fixed it, erased the code, but it popped back up. I did try unplugging the MAF sensor which stopped the surging. So, does that mean I have a bad or dirty MAFsensor? Would that cause my engine to run lean? I included a video of the surging. Thanks in advance for any help given.
Video (Click to make bigger)
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Saturday, November 5th, 2022 AT 12:06 AM