Join Date: Dec 2008
Location: NW IL
Thanked 392 Times in 331 Posts
If you have a C15, there are updated fuel filter bases you can get from Cat to reduce the restriction on the secondary engine mounted filter. It is a known problem. Getting longer fuel filters help as well. More area to pull fuel through. Best to stay with Cat, Fleetguard or Baldwin filters. Others like Carquest filters, I've usually had HIGHER restriction with NEW filters, vs the ones that had 20k on them. That is BS!
Another thing on a Cat, is to replace the fuel bypass valve. Spring gets weak, and you lose fuel pressure. Dirty fuel filters make it even worse. Only costs ~$25 to replace.
"Some people are educated beyond their intelligence."
'93 W350 CC, LE, 5spd, HTT modded H1C, 4" DE
Sold- '99 3500 Q/C, SO CTD, 4x4, 5spd.
Traded off- '97 3500 C/C, 4x4, CTD
'92 W250, LE, CC, CTD w/ tweaked pump
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