elabay Posted May 3, 2018 Share Posted May 3, 2018 I have a 2014 gu713 with the mp8. Last week the truck was running fine. I got the check fuel filter message while coming in to yard. I changed filters everything seems good. Next day check engine light and fuel restriction message and fuel filter light comes back on, it wouldn't make it to 40 mph empty, while surging pretty bad. Changed filters again and blew out the cooler plate. Filter and restriction messages went away but cel is still on. Truck still can't make it to highway speed and surges bad. Any ideas what else it could be? It starts and idles fine. Quote Link to comment https://www.bigmacktrucks.com/topic/53284-sick-mp8/ Share on other sites More sharing options...
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