DTC P1222 Misfire at 1500 RPM Injector Tick?

Powerstroke Man 6.4 · Oct 7, 2013

Hi everybody got my 7.3 got DTC 1212. Got my new swamps 160/100% injectors T500 HPOP airdog 100 GTP38R W WW2 PHP Hydra swamps tunes Swamps IDM and all the other mods in my sig. UVCH vavle cover gaskets are new. Well when I start in the morning it starts and runs normal nice smooth. When it up to temp it starts to run rough when I start it starts to lopes and idle rough no matter what tune bucks in gear at low RPM. Oil and HPOP res full less than 1000 miles on oil. ICP sensors were replaced about 1 yr ago. New walbro GSL392 less than 200 miles no fuel or oil leaks tank was cleaned also. 307,860 miles fuel bowl is spotless. I also have a injector tick (not crackle) left bank. I also should mention no smoke of any kind at start up hot or cold Thanks in advance

mandkole · Oct 7, 2013

IPR/IPR wiring issue/IPR oring/injector oring-- the code is saying its not building ICP as required during cranking. Ive seen these be electrical or mechanical.

Can you tell which injector changes tone/noise in the buzz test?

Powerstroke Man 6.4 · Oct 7, 2013

mandkole said:
IPR/IPR wiring issue/IPR oring/injector oring-- the code is saying its not building ICP as required during cranking. Ive seen these be electrical or mechanical.

Can you tell which injector changes tone/noise in the buzz test?

Could it be another ICP sensor?

Powerstroke Man 6.4 · Oct 7, 2013

mandkole · Oct 8, 2013

No, I think its IPR, oring sealing issue (the p1222) and a mechanical injector or valvetrain issue (the tick). Run a buzz test on the injectors and listen for tone change to eliminate the injector. pull the valve cover and look for abnormal push rod, rocker issue. you can idle the motor with the VCs off to assist with locating noise.