1965 Mustang 200 CID engine stalls when giving gas.
I have a standard 1-barrel carb on my 200 cid engine. A new problem came up this Spring. The engine turns over ok, choke works as it should, but it is idling a bit rough and when I try to give just a little gas the engine dies. Any ideas on the reason?
You say "this spring"...has the car been setting a few months? I would spray some carb cleaner in it, could be old gas, any number of problems. Give us some more details. Troubleshoot fuel problems first, then move on to ignition
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"yeah though I walk through the valley of the shadow of rice, I will fear no turbo for torque art with me. Thy rods and thy crankshaft, they comfort me."
Yes, it has been sitting over the winter, although I've been running it the past few weekends in the garage. Put some Stay-Bil in the tank over the winter. I did top off the tank (only about 1/4 of the tank) the first day I took it for a drive about a week ago. Went 25 miles and it ran great, sat all day then drove it home and that's when it acted up. Got progressively worse, from having to baby the accelerator to crawl home - until it finally stalled a few times at stop lights. Now even though it starts ok, when I try to apply the smallest amount of gas it immediately stalls.
Maybe the fuel pump is toasted. My '68 Cougar would stumble and loose power, and it was the pump.
Does the exhaust smell lean? How do the plugs look?
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1992 Deep Emerald Green Mustang GT Hatch, 5 speed, 2.73s, Mac fenderwell cold air intake, '93 Cobra MAF, Mac 70mm throttle body & spacer, Explorer intakes, Mac unequal headers & offroad pipe, Magnaflow catback, Walbro 110lph fuel pump, Jet adjustable FPR, MSD Blaster coil, Accel 8mm wires, FRPP aluminum quadrant, UPR firewall adjuster, stock cable, Granatelli upper control arms.
Waiting to go on: Granatelli lower control arms, and GT40 Iron heads!
Pull the fuel line at the carb and have someone turn it over and see if you are getting fuel up the line. If not, change the filter. If you are, clean and rebuild the carb. If problem still exists post again. We'll get this nipped in the bud!
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"yeah though I walk through the valley of the shadow of rice, I will fear no turbo for torque art with me. Thy rods and thy crankshaft, they comfort me."
Thanks for all the replies. I'll check the smell of the exhaust. Replaced the plugs last Fall. It's definitely getting fuel...which brings up the other problem I've had since last year. When I shut off the engine, the resevoir apparently continues to fill high enough that the fuel seeps out of the gasket and stinks up the whole garage. My Dad (a retired Ford mechanic) has checked the valve, checked and adjusted the float (all ok) and of course we replaced the gasket and added liquid gasket (the carb face is a little warped). I got a new carb kit to replace the float and valve. I guess the culprit on the stalling issue is either the filter or pump. I should probably just get a new carb too.
I scoured the internet looking for info on the Autolite 1100 and found a lot of negative stuff, many referring to problems similar to mine. Also read about swapping a Holley 1946 for the 1100. Anyone ever done this? Any thoughts?
I had a 1946 on my Falcon...never had any problems. Your giving up on the Autolite?
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"yeah though I walk through the valley of the shadow of rice, I will fear no turbo for torque art with me. Thy rods and thy crankshaft, they comfort me."
UPDATE - We plan of working on it Sunday, but I was invited to participate in a Mustang display at a local dealer (they're showing off a new Shelby) on Saturday (tomorrow). I went out this morning and fired it up. After it warmed up and the choke opened, it no longer simply died when I gave a little gas. However, when I took it around the block, it was doing the same old bad acceleration hesitation and I had to go on/n/off the gas pedal to keep it going. I may run and get some carb cleaner to try as a temporary measure.
Today I replaced the fuel filter on the pump and the one attached to the carb. It runs 100% better. The pump filter was loaded with rust dust (I replaced the fuel tank and sending unit last fall). I also got a ride in a new Shelby GT-500, 500 horses, woah!!!
1965 Mustang 200 CID engine stalls when giving gas. 
