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68gmsee · 02-25-2013, 08:56 PM

^ agree. The guy was not blowing smoke. These tanks also accumulate rust particulates that get passed on to the carb. Best thing is to install an inline fuel filter along with the regular inline filter if you don't want to mess with cleaning out the tank for now.

That being said, that may not be the problem. First go with the recommended procedures about double checking the float and making sure the bowl and needle valve and seat are clean. Also, the fuel that you see leaking is probably caused by the excess fuel in the bowl. Easy enough to check.

Preliminary adjustments that I do for the idle air screw is in until it seats and back off about 1-1/2 to 2 turns. Then use a vacuum gauge to adjust for highest vacuum.

I also agree that you should go back to original jet size. You're not going to gain a whole lot of extra power with the larger jet and it may mess you up in the other adjustments.

02-25-2013, 08:56 PM	#7
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: rochester monojet leaking fuel ^ agree. The guy was not blowing smoke. These tanks also accumulate rust particulates that get passed on to the carb. Best thing is to install an inline fuel filter along with the regular inline filter if you don't want to mess with cleaning out the tank for now. That being said, that may not be the problem. First go with the recommended procedures about double checking the float and making sure the bowl and needle valve and seat are clean. Also, the fuel that you see leaking is probably caused by the excess fuel in the bowl. Easy enough to check. Preliminary adjustments that I do for the idle air screw is in until it seats and back off about 1-1/2 to 2 turns. Then use a vacuum gauge to adjust for highest vacuum. I also agree that you should go back to original jet size. You're not going to gain a whole lot of extra power with the larger jet and it may mess you up in the other adjustments. __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...