trouble after head studs and nozzles

[TSeaman]

2006 dodge ram 3500, 6 speed... ... we put in arp head studs and changed the injector nozzles out for 90hp ddp's. put everything back together and the truck cranks, but will not start. the batteries and cables along with grounds have been checked.....



it is throwing two codes



p2146 = fuel injector group 1 supply voltage circuit



p2509 = ECM/PCM power input signal intermittant



the mods on this truck are = afe stage 2 intake, straight exhaust, dual disk clutch, and bully dog triple dog with outlook



any help would be appreciated

thanks

 

[JWesthoven]

humm. i'll bump this up for ya. i gotta sleep a little on this one. first i would try is to find someone that has a smarty and load up the stock software and see if it runs. i had a buddy with a bully dog and his truck wouldnt start after head studs. loaded up my smarty to clean out the ECM and it fired up. his didnt throw those codes tho and he could continue to use the BD after i unloaded my software. i would check for any pinched wires on groupe 1 and any pinched wires in general... .

 

[WMonroe]

Have you rechecked the wires going to the injectors?

Will

 

[TSeaman]

have checked the wires many times. everything looks good. the data logger says no high rail pressure. after cranking, it shows only 24. 8 psi... . so something is telling it not to make pressure. removed the bully dog and put back to stock-still no go... ... . thanks

 

[JWesthoven]

this is beats the hell outa me!

 

[PaulJohnson]

Both the plugs on the IP are still hooked up? Maybe they got knocked loose while doing the upgrade. Check to see if you hear the pump in the tank running. See if the fuel filter housing is full. But it sounds like a loose ground or intermittent power connection.

 

[lmills]

try unplugging the fca connector while cranking and see if pressure builds. You may have to remove injectors and re-install them while looking over everything very carefully. It could be either a copper washer is missing, or there is more than one in a bore causing the connector tube to not seal against the injector. The ECM will not fire the injectors till the pressure builds. One other thing to consider is an injector with a dead short on a solenoid. Usually when that happens though the injector does not fire at all.

Definitely would consider looking over every part of the install. And I cannot stress enough that you must be very clean during the whole process. Also, check the ground that goes from the drivers battery down to the ecm itself. On some trucks it is not molded into the factory ground connector.

 

[CPavlic]

Is there any fuel leaking from any where? Ive seen one of the connector tube nuts not tightened enough and although it wasnt leaking much fuel at all, it still kept the rail pressure from building.

 

[bsappington]

Pull all of the connector tubes out and check the ends where it seats into the injector. Most likely one will be damaged. Happened to me once. #@$%! Turned out the injector was not fully seated into the cylinder head when the connector tube was torqued.





This will never happen again.

 

[dan.poitras]

You can purchase rail caps through snap on and others.

Cap the rail going to each injector one by one and you will identify which injector is the culprit providing that is your problem and it's not more than one. I have six just in case.