fuel pressure gm 454 1998 motorhome

Rich Biebel · 02-12-2013, 08:16 PM

I had a '96 GMC with the same driveline as your MH...

Started to have engine issues when it was only a few years old.

Intermittent loss of power and stalling.....

I did the fuel pressure test and your numbers are fine...

I changed a bunch of parts including the fuel pressure regulator....and the problem would come and go....

Problem persisted....and got worse...

I attached a fuel pressure gauge and taped it to the windshiled and drove it around untill it started acting up.....Fuel pressure was dropping.... a lot...

It turned out to be the fuel pump pickup filter sock....It had dirt.... and red silt in it and was causing the problem....

I replaced the pump....filter sock and can filter......and stopped going to the gypsy gas stations I was going to......Problem never occured again....

I kept that truck for 14 years and bought it new and towed with it all those years......

02-12-2013, 08:16 PM	#4
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,320 Likes: 25 Liked 557 Times in 217 Posts	Re: fuel pressure gm 454 1998 motorhome I had a '96 GMC with the same driveline as your MH... Started to have engine issues when it was only a few years old. Intermittent loss of power and stalling..... I did the fuel pressure test and your numbers are fine... I changed a bunch of parts including the fuel pressure regulator....and the problem would come and go.... Problem persisted....and got worse... I attached a fuel pressure gauge and taped it to the windshiled and drove it around untill it started acting up.....Fuel pressure was dropping.... a lot... It turned out to be the fuel pump pickup filter sock....It had dirt.... and red silt in it and was causing the problem.... I replaced the pump....filter sock and can filter......and stopped going to the gypsy gas stations I was going to......Problem never occured again.... I kept that truck for 14 years and bought it new and towed with it all those years...... __________________ Rich Biebel S/C 1479 Stock 147R Last edited by Rich Biebel; 02-12-2013 at 08:19 PM.