P0301....what gives???

Sup amazing people. I’m having this code consistently reappear. Work I’ve done as of late;


New plugs
New wires
New coils
New fuel injector (in cylinder 1)
New seal for the head cover

completed a compression test and got consistent readings. I’m stumped now. Any suggestions?

 

Remember it is the complete circuit poor connection physical damage to the wire harness

Corrosion unseen by the eye yet the meter probe gets a good reading driving you crazy .

Bent pins female sockets worn enough to not connect .

All manor of interesting things

Do you still have a Miss easy to feel and hear or is the code just keeps tripping ??

 

If those things you list were done correctly and with correct oem parts and you tested compression and it checked out, I think my next step of testing would be to see if any coolant can be detected in the exhaust with one of those sniffer test deals.
Bummer to spend on all that stuff man, though most of that stuff gets done anyway with routine maintenance.