Carb Troubles

[Guest foxstang89]

I have a stock 302 in a 89 mustang thats carburated w/ a air gap four barrel

intake. The Carb of choice was a 650 Holley double pumper. I cannot get the engine to run right? You can adjust the carb and timing, but nothing changes.

Runs very, very rich and have to change spark plugs after 4-5 min of running.

The car runs great while it runs out of gas?

[twistedfocus1647545489]

I'd start by checking for vacuum leaks. If nothing changes when you adjust it (like screwing the mixture screws all the way in or something) it's probably pulling air in somewhere else and will not be able to meter the fuel correctly.

 

If this is an old carb check around the carb itself for leaks (especially the throttle shaft), as that's an often overlooked source of vacuum leaks.

[351mach11647545510]

if all else fails and everything checks out but it keeps running that rich, check your floats. might be stuck.

[Guest foxstang89]

I have replaced both floats, needle and seats, cleaned the metering blocks, replaced

the power valve. Everything is adjusted correctly.

[Guest Removed]

whats fuel pressure?should be 5.5 to 7 anything over 8 and it will fload. where do you have the floats set?

 

do you have the right distiburtor in it? last time i seen someone have this same issue, they was tryying too use the FI dizzy.

 

im sure i could get you on the right track.