Hard Startin M1008

[Abbylind]

Ive had my M1008 about 10 years. Its always been a little stubborn starting when its cold or sat for a while. When its warmed up you barely touch the starter and VOOM it fires right up.
Lately its getting more arthritic and harder to start when its cold. I fire the GPs twice through the GP card and it finally starts.
Ive replaced the lift pump (leaking) no difference
Checked the GPs (shows 70-90 ohms each)
GP relay is original but works fine
Cleaned the return fuel valve on the IP ( still no joy)
The only thing I can think is it act like its starving for fuel as it almost starts while I crank. Second GP run... it starts
Iders?
Thanks
PS
Did the doghead relay switch out yesterday (Ive never heard of the sticking relay problem in 10 years) But Im glad I read about it here

 

[doghead]

Those ohm reading sound incorrect or you have 8 bad glow plugs.

Do you know about the TMs?

 

[Abbylind]

Yep I'll hit the TMs
The more Im researching I think grandpa needs new set of GPs. They are 10 years old and have over 50k.....
Thanks

 

[truck1]

I think it might be time to change your GP's.I just completed the GP resistor bypass,put in a new set of AC60G's,and put a momentery toggle switch to bypass the card just in case.The card still functions ,now the GP's go through only 1 cycle automatically,and it fires right up.Even on cold mornings,high idle is not required,it fires right up.If you wait too long to change the GP's,they might not come out easily or in 1 piece.Good luck.

 

[citizensoldier]

If new GP's don't fix the problem I would then check for air leaks around the fuel filter housing and leaks in the Injection pump throttle linkage. It sounds like it could be sucking air somewhere.