OFV stands for over flow valve.. it is a banjo fitting on the front inside of your p7100.its on the inside top corner between pump n block. It is your fuel return line from our pump. If you get one good for 40 psi youll notice a power increase

 

Okay sounds like a positive add either way. I did a little research for them today. Sounds like they come preset to a psi. I'll get the other parts installed and keep the OFV on my list of things to add. Man I really appreciate all the help and input.

 

no problem. been there. done that. x10 and then some. and had all the headaches and learned the hard way.haha. theres so many easy cheap upgrades. also look up a p7100 rack extention plug. there like 15$ and it adds like 50 hp

 

What do you recomend? TORK TEK CUMMINS ADJUSTABLE OVERFLOW VALVE 22 to 35psi or tork tek also has one that runs a bit higher than that but does it matter on the psi will it only go so high with a stock P7100? I pretty much have a a stocker just a S&B cold air and Exhaust. And Ill look that extention plug up as well.

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TORK TEK CUMMINS ADJUSTABLE OVERFLOW VALVE OFV010 - Tork Teknology

http://www.torkteknology.com/product...-OFV040HP.html

 

Well I got it all instaled new fuel shut off, Block heater. Trucks got new life in her. Starts great. stays super warm overnight being plugged in. The fuel shut off boot on the old one was ripped pretty bad, Block heater just did not work. INFO note, being my first time doing the block heater I had no idea what to expect Lost alot of coolent ha ha! Thanks again for all the help. Gotta love the help of the Diesel Community.

 

If your truck starts acting up with not wanting to start the first time around, check the big relay just above the shutdown solenoid... it also can cause it to not want to start each try... I pried mine apart and cleaned the contacts, stuffed it back together and it's been good for the last 2 years