dbeck
SDD Junior Member
i have a 94 f-250 that is almost imposible to start when cold. i have replaced the high pressure oil pump,lift pump,glow plugs, and valve cover gaskets. what am i missing?
Help Needed 94 f-250 hard start
- Thread starter dbeck
- Start date
BJS
Full Access Member
glow plug relay would be my first guess given what you've already done.
95_stroker
Jefe
Yup, the GPR would be my guess also.
Welcome to the site.
Welcome to the site.
Diesel Kinevel
97 Stroker
Ya thats what Im thinking. When I bought my truck it was the relay that went so I took it back for my 30 day warranty and told him it wasnt starting in the cold. He then replaced all the glowplugs for me which didnt help and I replaced the relay the next day...happily ever after
dbeck
SDD Junior Member
sometimes you can't see the forrest for the trees. i'll try a gpr as soon as i can a chance. thanks
BJS
Full Access Member
I was thinking when I glanced back at this thread thinking wait it's summer so "cold" is not really that cold ie not cold enough to actually need the glow plugs. Right now mine are disconnected and I have no problems starting.
So now with that revelation, (don't ask why it took so long to come about) the next likely suspects are the batteries or starter getting weak.
Since diesel engines are compression engines and the heat for initial starting is generated by the compression of the air and assisted by the glow plugs. With the engine temperature greater than 60°F there is no need for glow plugs. I will say that I recently finished chasing similar problems. I know I had newer glow plugs, and a stancor contactor replacing my gpr, and my UVC harnesses & VC's were good and/or replaced when I did the GPs I had replaced the batteries about 3 years ago. So the last avenue was the starter to which I about choked when the parts guy told me the core charge was $10 more than the starter. So to end the long story after replacing the starter I am amazed a the difference in how the truck starts to the point now that I've disabled the GPs for the summer. (11&1/2 months a year)
So now with that revelation, (don't ask why it took so long to come about) the next likely suspects are the batteries or starter getting weak.
Since diesel engines are compression engines and the heat for initial starting is generated by the compression of the air and assisted by the glow plugs. With the engine temperature greater than 60°F there is no need for glow plugs. I will say that I recently finished chasing similar problems. I know I had newer glow plugs, and a stancor contactor replacing my gpr, and my UVC harnesses & VC's were good and/or replaced when I did the GPs I had replaced the batteries about 3 years ago. So the last avenue was the starter to which I about choked when the parts guy told me the core charge was $10 more than the starter. So to end the long story after replacing the starter I am amazed a the difference in how the truck starts to the point now that I've disabled the GPs for the summer. (11&1/2 months a year)
