nicksorenson
Registered User
I just replaced all of the fuel return lines (injector bypass lines) with clear fuel line. Looks good so far. Here's what I noticed when I finished the job:
Parked the truck up a steep slope to purge the air and lots of air in the return line to the Fuel Filter. Once it ran about 1-2 minutes the air completely cleared out.
Then....
I waited 5 minutes and started it again and it still runs rough at start up, but... there is no air in the fuel filter return and injector bypass lines.
So...
It's got to be somewhere else I'm getting air. I pulled the valve core out of the schrader on the fuel filter housing and hooked up a clear line. LOTS of bubbles came out of that line. At first the truck was sputtering like crazy and NO fuel was coming out at all (Only Air). Then it got bubbly for a minute and then only fuel but it took about a minute or so. But I'm sure this is why it starts rough at first. Where do I look?
Parked the truck up a steep slope to purge the air and lots of air in the return line to the Fuel Filter. Once it ran about 1-2 minutes the air completely cleared out.
Then....
I waited 5 minutes and started it again and it still runs rough at start up, but... there is no air in the fuel filter return and injector bypass lines.
So...
It's got to be somewhere else I'm getting air. I pulled the valve core out of the schrader on the fuel filter housing and hooked up a clear line. LOTS of bubbles came out of that line. At first the truck was sputtering like crazy and NO fuel was coming out at all (Only Air). Then it got bubbly for a minute and then only fuel but it took about a minute or so. But I'm sure this is why it starts rough at first. Where do I look?