68 mustang stalling - Vintage Mustang Forums
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post #1 of 6 (permalink) Old 07-14-2019, 06:45 PM Thread Starter
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68 mustang stalling

Need some ideas or advice. We have done some work lately on it after it’s has sat for 8 years. Replaced a couple things and put it back together and it runs fine in idle but as soon as you press the throttle it wants to stall and in drive it will stall when you first give it throttle. Once you continue to give it gas it runs fine again but once you slow down and hit the gas again it stalls. Replaced the carburetor, coil, and put an electric fuel pump in but it still stalls as soon as you give it throttle unless you give it more throttle to get past that point but will run all day in idle. Made adjustments to the carb for days but no matter what I adjusted I couldn’t get the stalling to stop.
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post #2 of 6 (permalink) Old 07-14-2019, 07:03 PM
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Did you overhaul the carb and let it soak in a bucket of carb cleaner? I can guarantee you that if it sat for 8 years it is all clogged up.
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post #3 of 6 (permalink) Old 07-20-2019, 03:09 PM
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Fuel Filter

I had a 67 Ranchero that did the same thing until I replaced the fuel filter.
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post #4 of 6 (permalink) Old 07-20-2019, 09:59 PM
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Might want to check vacuum hoses as well.
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post #5 of 6 (permalink) Old 07-20-2019, 10:17 PM
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Check for vacuum leaks, and check your timing. Your advance may be shot, so check both the mechanical and vacuum advance parts for proper operation. Your balancer may have slipped affecting timing as well.

Look in your carb bowl. Any signs of a fine reddish brown silt? If so you have rust in your gas tank or fuel lines and they need replaced as well as your fuel filter.

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post #6 of 6 (permalink) Old 07-20-2019, 11:37 PM
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A stumble when you mash the pedal may be a leaky accelerator pump/clogged squirters.

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