Intermittent fuel issue - IIA/2.25 petrol/weber 34ICH/mechanical fuel pump

[cgalpin]

To avoid hijacking a related thread on warm start issues, I will start one for an intermittent fuel issue I have been having.

The truck always idles great, starts right up (unless warm start after a short stop, see http://forums.roversnorth.com/showth...4690#post84690).

However, in a seeming random fashion it will go from running great to having no power without the choke all the way out. By no power I mean even in neutral if you blip the throttle it will stutter like it's not getting fuel. I have noticed that it can start happening by simply hitting a bump (my springs are rusted/stiff and the rear will bounce easily). It can last a long time in either state, or switch back and forth relatively quickly like in alternating trips).

It will seemingly randomly self correct as well. Just recently I was idling or at near idle for a few minutes while my daughter was practicing parking, and although it had been in the "choke on" mode up until that point, I tried without it and it was fine. Not sure when exactly it self corrected but it did.

Because it is intermittent I am hesitant to blame the carb, although I have a rebuild kit and if it comes to it I'll rebuild it. It has a generic Purolator filter right before the carb and I recently replaced it but the problems still occurred after. It's the clear kind and usually it sits about half full. The old one looked well used but no obvious signs of dirt in it.

The truck is running fine at the moment, but while doing other maintenance I did notice a bunch of crap in the fuel pump sediment bowl which I have since removed.



If you have any idea what the yellow looking material is, please let me know.

Other than inspecting the tank for issues, does anyone have any suggestions?

TIA,
charles