by ellis93 » Mon Sep 30, 2013 8:10 am
My dad had one that did something similar.....it would run like a champ then all of a sudden kill itself at low rpm. To get it to run again you'd have to spin that motor for at least a minute and it would fire right up. We really didn't go that far into it,we just snatched off the pump and told the pump shop to fix it. After it was put back on it never did it again.
I asked the builder what the issue was and he just told me there was some metering plates that would cuase the issue. That could be total BS but you couldn't prove it by me.
Every had start issue I've ran into with these motors were one,or combination,of three things.....compression,crank speed,or glow plug solenoid. Mostly solenoid problems as they are of poor design(IMO of course). They house a thermostat that goes bad and wont cycle the plugs when hot,and these motors need them even when hot (say 150° or less hot). If you replace it,the only ones that work are from the dealer,I've used the borgewarner brand from O'Reilly and they don't last long. I've even went as far as to mount the thing to one trucks fender well to see if they'd last longer and still dead in short order.
Best just to rig up a push button to actuate it and be done with the thermo control.
93 D250 ,5 speed,4.11s,k&n autometer tach pyro trans boost guages,GDS 60mm h1c 14cm,honed 5x10,hplp/reg,1/8 timing,M+H M2 fuel pin, tims cooler tubz