CM2250 Poor fuel mileage

[amermextrucker]

(02-18-2022 )Rawze Wrote:  I was at Mr. hags yesterday. There was a truck there that got 5 mpg no matter what anyone did to it. - I looked it over pretty well (without cranking it up or doing any tests) .. and found that when I cracked open the davco drain valve, letting it pour into my hands.. the first few drops that came out were (red) coolant, followed by fuel.


Last i checked, these ISX engines do not run on steam.. so i told the guys at the shop to test it for leaking injector cups.

After the injectors were all pulled out and the coolant system was pressurized to 6 PSI.. 4 of 6 cylinders were seeping coolant.. one of which was a steady "drip, drip, drip".

That is the main contributor of why his fuel mileage was so bad, however...
...

I don't have any of those issues. It's amazing how some people treat there equipment & then blame it when it fails.

Rawze is the IMAP where I should start ? Also would u suggest replacing back pressure sensor as well ?