Code P0301, please help !

Hi guys ! You’re my last hope I have been battling with this code for months‍♂️2010 Tacoma 2.7 , regular cab , 2WD,,, Automatic. Here a list of everything done to fix this issue : spark plug , coil and injector replaced, 150 psi compression at first stroke ending in 180 psi, injector connector checked for positive voltage, injector pulse signal from computer checked with a noid light tester, new fuel pump, what am I missing???☹️ , any fresh advice or recommendation that help me to solve this problem will be greatly appreciated.

 

Welcome to TW! If you haven’t already, post this in the 2nd Gen section and you’ll probably get more help.

 

A slow leak from a headgasket can cause this, it wont even be noticeable with the reserve level.

Most times its a misfire on cold start that clears away, but it can happen on load.

A pressurized coolant system with a borescope is my next suggestion.