CUCV Wont accelerate Wont rev in neutral until RPMs creep up

[NMC_EXP]

What clogs up the check valve is the rubber/plastic ring inside the injector pump is breaking down. It hols the weights in place

That mean the injector pump has one foot in the scrapyard?

Regards

Jim

 

[WARWAG]

Sounds like it.

 

[MuleMac01]

just get a rebuild it's about 400 bucks cheeper to do it

 

[combat jump]

ITS ALIVE!! ITS ALIVE!!!

Somemedic, thank you for the info! My new M1028 would only idle, die, and drive at a top speed of 5 mph. Cucvfreek spent 4 hours helping me bleed the fuel at the filter, and look for other issues. I was on the verge of ordering a rebuilt injector pump, when I did a final search for similar problems.

I removed the rubber return hose from the top of the IP, unscrewed the nipple, put it in a vice and dropped a 1/8" punch into it - a few raps with a hammer broke the glass in there. Shot brake cleaner through it, then compressed air. Put it all back together, and it fired right up, and REVVED! I got in it and drove 30 miles. The truck hit (indicated) 82 mph!

Thanks to you, Cucvfreek, and all the other guys who post helpful info on this site! I am now an M1028 driver!

 

[Cucvnut]

no problem man sorry i could not get it running but it was cool to see your truck and help ya

 

[dmilkman589]

mine has no ball no valve at all. just the nipple screwed right in to the pump, is this bad. is this why i have no power and white blue smoke???

 

[motormayhem]

Eliminating the check valve is a short-term fix for a failing injection pump. If yours in missing then that alone wont cause a problem.