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1967 ford mustang 289, 4bbl engine has been rebuilt/ w performance camshaft. will not idle correctly . carb has been changed , ignition has been updated , wires cap points and rotor ? checked for vacuum leaks ? idle vacuum is 13 to 14 in ?

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  • brbclayton10 Oct 02, 2008

    I am having the same problem. I just changed the intake and carburetor from a 2bbl to a 4 bbl. The intake now is a performer series and the carburetor is a 600cfm Edelbrock with a manual choke. Before the change the car idled and performed fine, but now I just can't seem to get it to idle correctly. The best I have tuned it, when stopping and starting at a stop sign, the engine would hesitate if I would barely push on the gas pedal. But after that it would run hard. What should I do?



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Hesitating when from a standing start, then running well can be caused by having too big a jet size. I dropped the size of the jets on my Holley 4V, and it solved that part of the problem. The accelerator pump will push in too much gas, momentarily "drowning"the engine til you get enuff air to mix with the gas.

Posted on Apr 21, 2009

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1967 ford mustang coil is getting so hot it turns of could this be from my points not gauged right? Plus at idle it sounds rough where do I start?? Help please


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It should be less than 12 volts

Iam a 1960's guy, but don't remember the exact voltage
There should be a resistor before the coil

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at least back in the day

The distributor needs to be on a clean surface ,so the points
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I have a 1966 mustang 6 cylinder and when I am driving it will sometimes stall we rebuilt the carb and looked at the choke it was loose and not tight that seamed to work for a little but it seams when i...


Look for intake leaks. Look for correct idle mixture, and anything loose, in terms of hoses and entire intake system.

Also, be sure that you have the carb heater working. I have witnessed carb iceing at measured 68 degrees f. This system collects warmth from the exhaust manifild and pipes into the air filter intake.

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1 Answer

What are duel points on a 351 ford motor?


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1 Answer

I have a newly rebuilt engine (289, 4bl) with a Demon carburetor (Road Demon Jr. / 525 cfm). The engine idles, and at strong acceleration runs fine. When I try to moderately accelerate or try to maintain...


Your problem would be in the power valve/accelerator pump circuit. This is the circuit that feeds gas to the engine when the changeover from idle to driving occurs.At idle the vacuum in the carb draws gas so no mechanical means of delivering fuel is needed. The same is true when you reach a consistant driving speed.During the changeover you need a way to increase fuel to the engine by mechanical means. Some carbs have an accelerator pump some call it a power valve. The changes in your intake and cam are enough so the stock circuit is unable to compensate properly. The dealer for the carb should be able to help you out with parts to increase the flow and rate of flow. Hope this helps.

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1966 ford mustang conv 289 2bl. When I got the


Try adjusting the air-feul mixture or just turn the idle up a little bit. For either of these there would be a screw adjustment near carb

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I have a 66 ford mustang 1 barrel carburator


when the engine is fully warmed up check the choke. it should be wide open.if not it needs to be adjusted.

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it sounds like the points are not opening enough. or to much timing. thats to far advanced timing. but points most likely good luck.

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