Mack EUP problem

[Eliott]

Hello, looking for some help with my 2003 Mack CH613 E7 engine, I have a lightning bolt displayed on the dash, and I'm getting a code of, 8-1,8-2,8-3,8-4,8-5,8-6, could all the EUPs be bad on the truck? The truck runs good ,no idle issues, I was gonna replaced all until I found out it around $800-$1,000 per Unit pump, thanks.

[fjh]

23 minutes ago, Eliott said:

Hello, looking for some help with my 2003 Mack CH613 E7 engine, I have a lightning bolt displayed on the dash, and I'm getting a code of, 8-1,8-2,8-3,8-4,8-5,8-6, could all the EUPs be bad on the truck? The truck runs good ,no idle issues, I was gonna replaced all until I found out it around $800-$1,000 per Unit pump, thanks.

Check and clean the engine grounds near the starter 15/16 bolt head  with a bunch of wires bolting to the block!

[880joe]

Someone on here was telling about a place selling eup's for less than 300 if I remember right

[Eliott]

I would not mind spending some money on EUPs if that's the problem, but if all the EUP were bad , would the truck even run?

[Mack Technician]

There was a time when Mack experienced premature codes during that vintage. They had a software update to “desensitize” the ECM so it wasn’t tripping so many 8 codes. That said......I’ve seen trucks with nearly all EUP popping codes and truck running down the road.

You should be paying $300 for those EUPs. I order from K & S Fuel Injection, Wausau. Mike Kosky. Wilbur has someone even cheaper, I forget the name of that website.

Edited February 24, 2020 by Mack Technician

[Eliott]

Thank you for your help I'll start by changing one, and cleaning the others, see what happens