sams50b2d Posted December 27, 2009 Report Share Posted December 27, 2009 A question about my Power Wagon - should be similar to the Pilot House. I just finished rebuilding the carburetor on my 58 Power Wagon. It runs a little better now but still wants to stall at idle. It also backfires through the intake manifold at the lower rpm's. The mixture screw doesn't seem to do anything when turned either way. Close the choke a little and it runs better but then the rpm's come up a little. One other detail is that the vacuum tube at the rear corner of the intake manifold is disconnected and is just sucking in air. I've thought to close that off or reconnect the vacuum tube but haven't tried it yet. Regular T137 230 engine with Carter E7T2 carburetor which is stock according to Clint Dixon's page. 20 - 25 degrees outside air temperature. I don't recall it acting like this last summer. Any ideas? Quote Link to comment Share on other sites More sharing options...
JBNeal Posted December 27, 2009 Report Share Posted December 27, 2009 If the vacuum port is open, then the fuel mixture metered by the carb is being made too lean. Plug that port (I've used a brass hex head plug I found at the hardware store), readjust your carb to get the idle speed at its leanest mixture, and see what happens. Quote Link to comment Share on other sites More sharing options...
Dodgeb4ya Posted December 27, 2009 Report Share Posted December 27, 2009 You better close off that tube at the rear of the intake- that will cause idle stall and popping. You cannot adjust the mixture screw till thats fixed and the timing points ect are correct 1st and the engine is fully warmed up.That vacumn leak is a major issue 1st off and was probably the original issue! Quote Link to comment Share on other sites More sharing options...
greg g Posted December 27, 2009 Report Share Posted December 27, 2009 Better yet conect a vacuum gaauge to that port and do you adjustments to carb and timing withit attached. Go to second chance garage and look at their section on using and interpreting vacumm gauge readings. It will show you a lot about the condition and functioning of yoru engine. The idle misture adjustment screw, regulated the amount of air being mized withthe fuel from the fixed idle jet. With a vacuum leak of any kind between the base of the carb and the ports, no amount of adjust ment will work, as the leak is leaninf (by adding unregulated air) the mixture to excess. When you close the choke you artificially lessen the air flow which results in a richer mix. But you need to block that port (or attach a gauge) and assure there are no other leaks, or adjustment will be ext to impossible. Quote Link to comment Share on other sites More sharing options...
albolton Posted January 11, 2010 Report Share Posted January 11, 2010 I have had this problem before as well....afetr you check for vacuum leaks..make shure that you have the correct base gasket, there seems to be several different ones, there is a vacuum port in the base of the carb that needs to line up with a slot in the base gasket, just because the gasket has a slot in it doesnt mean its lining up correctly with the port, and you will never get it to run right if its not....I wasted many hours chasing ghosts in my truck, fixed that and it ran perfectly Good luck Quote Link to comment Share on other sites More sharing options...
jjefferson Posted January 16, 2010 Report Share Posted January 16, 2010 Hey SamS Did you ever sort out your carb issues - I have the same set up and fighting with mine as I type.. JIM Quote Link to comment Share on other sites More sharing options...
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