95 7.3 has stalling and bucking usually after you run the truck for 20 miles or so. Suspected o rings because of black fuel filter and a little blue smoke when first started. So I pulled injectors put new rings on and gave it a fresh oil change. The bucking is still there though but not nearly as bad. Any ideas?

 

Start with a new CPS. Only get one from Ford or IH. Don't get one from a parts store.

 

10 4. Do you recommend disconnecting the batteries when installing the cps?

 

Wouldn't hurt. I usually remove both negative cables when I do anything electrical. CPS is a common failure, and a cheap enough test. If it turns out not to be the issue, then you have a spare to keep in the glove box, which is a good idea anyway.

 

The bucking could indicate a bad IDM

 

Mine has bucked when the fuel pressure gets low. There is a Schraeder valve on the fuel bowl where you can check it. I think it should be at least 50 psi or so, not sure of the exact number. Probably not likely but doesn't cost anything to check it.

 

no less than 40 PSI in 3rd at WOT


here is a hit list of stuff I did when I got mine to share with you
https://www.ford-trucks.com/forums/1...sel-truck.html