My 5.9 I have a smarty stage three intake and a mrpb 5 in exhaust from the turbo back need help I think I blew my PCM not sure I have no power goig to 123 injectors but power in 456 my truck is missing bad it happen when I was passing a semi when I came to normal speed noticed alot of vibration

 

What year? Have you checked the fuses?

Try the key trick and see if you have codes.

https://www.dieseltruckresource.com/...s-t224833.html

 

Its a 07 and there is only on fuse box right under the hood well I checked them an there good what Is the key trick

 

Look at the link I posted.

 

i have it at the mechanic shop and he put the computer on it but ill let him know. what does that trick do just show you codes or may fix it he feels that when i punched it i blew a circuit in the PCM. IF i am not mistaken there r two circuits in the PCM

 

When you do the 'key trick' it will give you code numbers that telly you what system has/had a problem. It is albeit a system disgnosis tool. Narrows down the area that failed for you. In the wiki section of the forum you will find the code listings. Do the key check, get the code numbers, then check them against the code list to see where your problem lies. It can save you big bucks in diagnosis of your problems, shops are expensive, they waste time on doing redundant old-fashioned diagnosis stuff, getting the codes from the truck will start you off in the right direction. If your mechanic does not know about how to check the codes, then, he/she might not be who you want to be working on your truck.


CD