Hello all,
Ive been trolling the forums for quite a while. This forum is a never ending well of information.
Was hoping yall could help me out a bit. I have a 2003 lb7, bought it about a year ago. Has roughly 210,xxx on it right now.
Over the past few months I've noticed a knock, dont think it is rod related as it only does it under load. Seems to be getting worse.
More recently over the past 2 weeks, I've changed my fuel filter, NAPA Gold to be exact, since I've changed it, it surges at idle. Mainly when cold but off and on throughout the day. When its surging and put it in drive, start driving and let off the throttle it will bog down to about 600 rpms and almost shut off, then pop back to normal surging. The fuel filter doesnt seem to be holding prime.
I just find it weird that the truck was fine before I switched the filter, minus the knock. That it would go from fine to surging with a simple fuel filter switch.
I am wondering if it is sucking air from somewhere, and hoping its not the FPR lol.
Anyways, I have taken some of the measures on here and applied to no avail.
I have ran 2 stroke oil in hopes that if it was the FPR it would smooth it out,and ran a bottle of Diesel Kleen.
Will most likely buy another filter this weekend and try to see if i get lucky.
Also looked at the rubber fuel lines coming from the filter housing they do have small dry rot like cracks in them, will probably replace those as well.
Other than that, does anyone have any other ideas? I apologize for the long drawn out post, but I didnt want to leave out too much detail.
Thanks for any replies.
In addition somethin I forgot to mention, the truck will not rev beyond 2200-2300 rpms while in park as if the high idle was active. It goes above that point while in drive.
Ive been trolling the forums for quite a while. This forum is a never ending well of information.
Was hoping yall could help me out a bit. I have a 2003 lb7, bought it about a year ago. Has roughly 210,xxx on it right now.
Over the past few months I've noticed a knock, dont think it is rod related as it only does it under load. Seems to be getting worse.
More recently over the past 2 weeks, I've changed my fuel filter, NAPA Gold to be exact, since I've changed it, it surges at idle. Mainly when cold but off and on throughout the day. When its surging and put it in drive, start driving and let off the throttle it will bog down to about 600 rpms and almost shut off, then pop back to normal surging. The fuel filter doesnt seem to be holding prime.
I just find it weird that the truck was fine before I switched the filter, minus the knock. That it would go from fine to surging with a simple fuel filter switch.
I am wondering if it is sucking air from somewhere, and hoping its not the FPR lol.
Anyways, I have taken some of the measures on here and applied to no avail.
I have ran 2 stroke oil in hopes that if it was the FPR it would smooth it out,and ran a bottle of Diesel Kleen.
Will most likely buy another filter this weekend and try to see if i get lucky.
Also looked at the rubber fuel lines coming from the filter housing they do have small dry rot like cracks in them, will probably replace those as well.
Other than that, does anyone have any other ideas? I apologize for the long drawn out post, but I didnt want to leave out too much detail.
Thanks for any replies.
In addition somethin I forgot to mention, the truck will not rev beyond 2200-2300 rpms while in park as if the high idle was active. It goes above that point while in drive.
