twostickmutt Posted January 2, 2007 Share Posted January 2, 2007 have a 220 cum-a-long in my G-73. is there supposed to be a fuel return line off of the PT pump. i noticed in an old motors manual it showed a return line. on mine there's just a plug. don't know if it was plugged to get more fuel up top or it's not supposed to have a return there. the only return is in the back of the head. i do know that it de-accelerates on the slow side (typical of cummins) and that's usually a sign of a restiction somewhere. thanks. j.j. Quote and remember "PREFORMANCE COUNTS" Link to comment https://www.bigmacktrucks.com/topic/1975-220-cummins-question/ Share on other sites More sharing options...
Guest Bollweevil Posted January 3, 2007 Share Posted January 3, 2007 It depends more on the specific fuel pump, than the CPL. If it has not been removed, there should be a tag riveted to the pump, on top of the housing to the rear of the tach drive. With the numbers off the tag either Cummins or a local pump shop could better answer your question. I have seen them plugged, as yours , plumbed into the return, and vented into the fuel tank. However,if the truck has ran good previously, I would not suggest changing the way it is set up now. If it has a flex-hose from the rear head, for a return, it could very well be stopped up. Take the fuel cap off and with the engine running , see if it is returning. check this first, and if you still have the problem, send me an email and I'll try to help you figure this out... Bollweevil Quote Link to comment https://www.bigmacktrucks.com/topic/1975-220-cummins-question/#findComment-9449 Share on other sites More sharing options...
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