Ca emissions to federal glowplug swap??

[onebaddmaxxx]

Yesterday I bought a 2004 lb7 for a steal of a deal. It had cold start issues and the guy didn't want to invest money into it. The truck has full ca emissions on it with egr, pump and the relocated glowplug system. Took my tech 2 with me and had the code for glowplug relay faults. I noticed the glowplug relay is on top of the y bridge and there is another box on the valve cover (assuming this send the individual wires out to each glowplug). I plan on doing the deletes on it, but unsure what I should do about the relay on the y bridge.

Eventually I want to put a 472 on it with aftermarket y bridge. There for I don't think the relay can stay there. Should I just get another relay for now or can you get a fed emissions relay and relocated it over to the valve cover and extend the wires? Thanks for any help

 

[duramaxzak]

I think I have a used GPR off an 03' Cali motor I parted out. Pm me if you are interested in it and I will make sure I still have it.

 

[03_DMAX]

You can get rid of the box on top of the intake bridge it's for the intake heater.

 

[dmaxbowtie]

i know there are some differences from the federal wiring harness to cali, not sure if the federal gpcm would plug right in? and if so you may have to change some tables on efi live for the glow plugs? also from my experience i had trouble making as much power with my egr engine/heads as compared to when i put a federal engine in.

 

[catman3126]

From what I understand the Cali GPCM is better then the Fed truck one is.

 

[THEFERMANATOR]

From what I understand the Cali GPCM is better then the Fed truck one is.

The CALI controller is basically 8 relays in one whereas the federal controller is 2 relays only one being for the glow plugs and the other for the intake heater(the CALI trucks use a remote intake heater relay). You hardly ever hear of a CALI controller failing, but federal ones lose relays after a few years. I run greatly reduced glow plug time in my BURB with no starting problems. Mine don't even hardly turn on until it drops into the 40's with my current tuning. Also you the CALI trucks run ALOT of after glow compared to federal trucks. This was done to reduce emissions and hazing during cold engine running. I turn most all after glow off until the engine temps drop below 50 or so.

 

[onebaddmaxxx]

Ill have to take that into consideration. The truck had an intake air heater circuit code or 2 in it when i looked at it. So i can get rid of the relay on top of the y bridge? The truck supposedly had recent glow plugs installed in it and he showed me receipts of them. I think I'm going to take it to work and use the MDI and relflash in a bone stock tune, and relish the glow plug control module and start from there. For all i know the current tune in it is a federal tune and thats why it won't control it.