M923A1 won't drive or rev up till engine is warm

[Ozzie]

Anybody having any problems with M923A1 stalling and not revving up until engine has run a full 20 - 30 minutes. If I take off too early, the engine slows down and acts like it's only running on a few cyl. It will not move. After 30 min or so, seesm to run great. Drove it for 2 hours getting it home a few weeks ago and no problems. Happens every time i start it. Thanks, Ozzie

 

[98G]

I don't think it's a warm thing.

I think your fuel system is sucking air. Allowing it to run for so long eventually purges the air.

My best guess

 

[74M35A2]

+1 on above. Replace rubber lines on suction side of system, insure fuel filters are clean and seated correctly, and try again.

 

[Ozzie]

Thanks, will get that checked today. Appreciate the help.

 

[Ozzie]

You were dead on. Fuel system was the culprit. Thanks again

 

[74M35A2]

There is a lot of actual real world experience here, specific to the vehicles.