Forum Discussion

lonfu's avatar
lonfu
Explorer
Mar 16, 2016

p30 stumble problems/ fuel pressure regulators

Ok, so having a problem with up towing stumble when under load. I have 98 454 "j" 26wu Itasca on the last year that chevy produced it's P30 chassis. This stumble has been a real bummer, I checked the ...
Class A
crasster's avatar
crasster
Explorer II
Mar 16, 2016
I'm going to throw one to you because of the mileage. Try Marvel Mystery Oil in the gas. I'm curious if you have slight injector blockage (varnish) or your pump needs a bit of lubrication. MMO will fix those. Run it with manufacturer's suggested mix to your tank size.

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