I recently pulled our Falcon out of storage after 19 years. It has a '69 302 / C4 auto, stock converter & trans-go shift kit. Motor has stock distributor, stock dual-plane & Holley 4160 4bbl w/ vac secondaries.
Car ran fine when parked & was started once in awhile.
Checked points, plugs, wires.
Dropped old gas, replaced fuel lines, replaced fuel pump, fuel filter (ethanol fuel plays hell on rubber eh?) put new fuel in and tried a start-up.
Motor only ran under full choke - fuel starvation?
Pulled carb and rebuilt with Holley kit, replaced, same issue. If we blow compressed air down the venturi RPM pick up so Primary circuit is working right, or not?
Tried searching for a vac leak around carb base, intake/head gaskets, none found.
Randy..Did you get all the pieces of the carb real clean when apart? Sounds like something in there is plugged up still andits not getting the gas.....Might also be the power valve is blown....
sounds to me like the mainbody is all varnished up, and not lettin fuel through the passages properly You would not see this in a rebuild - pull the jets and power valve, look behind them for varnish or cacked up white stuff Blown power valve would flood it not starve it
Pulled it right apart, sprayed carb cleaner into every hole, wire brushed & ran little wires in orfices, jets, etc, then blew air through everything. Cleaned metering block the same way. New power valve, new float inlets, etc. Bench set the floats then adjusted on the car running. Ample fuel pressure.
Dis-assembled it a 2nd time, checked everything, re-assembled & installed.
Got it to run without the choke but it surges and sounds like it's two-stroking. Can't really get a crisp sound to it. With the cam it should pop on each cylinder like it used to but won't.
I used to rebuild this thing in my sleep but apparently I'm missing something, thanks for the suggestions guys, keep 'em coming.
I'm gonna pull the Edelbrock 4bbl off our Comet (same motor with less cam) and see what happens. If it runs good I can rule out everything with excepting to the Holley. I'll pull it apart again but if I can't get it right it's going in the pond - the carb - not the car.
did you run wire into the air bleeds - mud spiders can be a real nuisance is the bowl vent(s) working properly - again - mud spiders you dont sound like you can draw fuel - so either the vents and bleeds are plugged, or something similar is going on
thanks Seeker, yup, did all that....about 3 times so far, still no luck. Actually I shouldn't say that, I can get some rpm adjustment on the passenger side primary screw but nothing with the driver side so I'm going to pull the bowl and jets again, see what I can see. I know it's gonna be some stupid little thing, completely incomprehensible to my simple little brain....arrgh. Ah well, still better'n sitting in a Hotel wasting time & money.
Alright, 4th times a charm. Pulled the metering block, drilled out the brass plugs over the wells and there it was - crud. Strang thing is we blew those passages out from either end and they blew through, weird but I learned something. Cleaned it out, slapped it back together and it's like a new carb.....should be for all the attention it got. Thanks for your input guys. Now, on to the brakes. Have a great long weekend.
