Discuss 1966 mustang starts but idles rough then dies on AllFordMustangs.com, the place for Mustang enthusiasts.
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it is a 289 with a 2 barrel carb. it takes a few tries to get it to start. i got it to run for 1 minute once. usually lasts 15 seconds until it dies. what could be the problem. i just rebuilt the carb, but it didn't help. could it be the idle screws aren't adjusted properly?
May not be getting enough fuel from the tank. Have you checked your fuel pump, fuel filter (it does not take much trash to plug the original type) and the filter on the end of the sending unit in the tank.
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1966 Mustang Vert., 200 CID I6, Autolite 1100, Pertronix Ignitor I, Candy Apple Red, black interior, black power top with glass rear window, C4 Auto Trans, Scarebird 4 lug front disc brake conversion, dual master cylinder, LED dash and tail lights.
1976 Cobra II, 302 CID, C4 auto trans. Blackjack headers, white with blue stripe and blue interior. Restoration and mod in process.
Could be all the things that you mention in your posts - hot or cold idle adjustment, timing or air/fuel mixture. I think that all can contribute to the symptons.
You may want to check out Veronica's blog (the link is provided below) on the article regarding carbs -- it can probably point you in the right direction and has pictures and written so that you can easily understand it.
when my 66 did that it was the choke kept sticking close so i just zip tied it open and no more problems. i live in houston so not much need for a choke
08 BULLITT 95 MUSTANG-CARBURATED 331 DSS RACING STROKER,ALL FORGED,EDELBROCK ALUM. HEADS WITH 2.08/1.96 VALVES DOUBLE COIL SPRINGS AND HARLAND SHARP ROLLER ROCKERS,COMPLETE MSD IGNITION SYSTEM,LONG TUBES WITH DUEL 3 INCH EXHAUST WITH X PIPE,BUILT WORLD CLASS T5 WITH KING COBRA CLUTCH,COMPLETE COBRA REAR END SWAP WITH 4.10 GEARS AND MOSER AXLES,BBK CONTROL ARMS,SWAY BARS, AND SPRINGS,BILSTEN YELLOW SHOCKS,ALL GOOD FOR 392RWHP AND 11.96 AT 110.61 ON SLICKS
I got this same deal on my 66 coupe but i just figured it was just how old cars were. It always takes a couple tries to start for me and i have to keep on the gas a little bit to keep it from stalling out. It seems that the car has to run 5 miles an hour before the motor will stay running. Never gave it any thoughts about it though. Figure it just needs to warm up.
I went to try to work on the mustang, but when i tried to start it, it didn't do anything but turn over. everything is how it was before when it sort of ran. i noticed that there was a bit of gas coming out between the carb and the spacer. I tightened the bolts down a bit more. what are the torque specs for the bolts holding the carb to the intake manifold? tightening them didn't help get the car to start. what could cause this?