Question about 1966 Ford Mustang

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1967 Ford Mustang-- idle problem

I have a 1967 mustang with an in-line 200ci. 6 cylinder engine. The engine starts right up at high idle. Once the engine is at operating temperature, it starts to shake and eventually shuts down. I have to constantly keep my foot on the gas pedal to keep the engine from shutting down. I'd take it for a short drive around the block and then park the car. The idle is quite high at about 1100 rpm and stays that way. Could it be vacuum problem?

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  • Anonymous Mar 16, 2014

    the car will run fine for a day or so but after sitting overnight the problem continues

  • Anonymous Mar 30, 2014

    I cut off the engine and try again and it runs right

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If I had to fix this, I would use a tiered approach. You have several issues to deal with. 1st- is the engine timing correct (lets assume it is), try adjusting the choke (blackdial on the ffront of a single barrel, turn towards lean) this should bring down the idle. Turn it till it almost dies then turn in the opposite dirrection SLIGHTLY until it steadies out. The engine might shake more now (it did w/mine) so now you losen the 1/2 bolt that is behind the distribibutor. Now that the dis. is lose turn the whole diss. assembily slightly in either direction. One way will steady out the engine, this is adjusting the ignition timmiing. If all that works out you should be golden. Of course there is a lot of possible causes connecting rod length between the gas pedal & carb, vac. leak(through a vac. gauge on it, that will help finding wether or not there is a leak). if this doesnt work repost with results and a vacum reading. I'll check back

Posted on Nov 23, 2008

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