Hi
What make is the FSD/PMD that you have?
I have a Dtech that was giving me wierd throttle responce and bucking,it was new in Jan,and does not have many miles,mine was a bit hinky right from the get go,now that i look back to when i got it.I was having FSD problems ang got the relocating wire and new Dtech seemed to sovle the problem at the time.About a week after i lost a head gasket,switched in a complete engin,thats when i noticed a bit of wierd throttle behavior which i assumed was from the replacement engin,then the optical encoder went south,changed thar and still had the wierd throttle responce.Finally was getting unreliable again so i tried a good known stanadyne FSD/PMD and the truck is running great and acting normal.
So never assume that a new part isn't still part of the problem
I will try another Dtech,they seem to last other than mine,but thats the kind of luck that follows me around
Thomas
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews