2nd gen 4.0 can't fix P0351 code

Replaced PCV, replaced valve cover gasket, replaced coils and plugs, then even moved coils......just can't get rid of P0351 code. A lot of hesitation and stumbling at low rpms and idle when code is active. Haven't touched MAF or TB.

 

P035x codes are coil circuit codes, they have nothing to do with the MAF or TB.
P0351 is for coil #1.


More info on them and some troubleshooting steps can be found in the post below.

https://www.tacomaworld.com/threads/2nd-gen-information-diagnostics.784008/#post-28042157

 

yeah, I know what the code is for, but as far as I can tell coil is good as well as spark plug. I swapped the coil packs to different cylinders and still same thing.

 

Check the circuits at the coil connector as outlined in the link I posted above and see what's missing.

 

Just start with a voltmeter and probe the specified pins on the coil harness and go from there?

 

Yes although I prefer a test light for power and ground checks, careful not to shove the test leads into the terminals so you don't spread the pins.