Engine Wants To Cut Out At 2000 Rpm On The 66

Discussion in 'Classic Mustang Specific Tech' started by deathsled, Apr 28, 2013.


  1. deathsled

    deathsled New Member

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    My engine is a 302 roller rocker with flamethrower coil and pertronix billet distributor. The car idles around fine but when I get on it there is a popping sound small pops at 2000 rpm and beyond and wants to stall. I checked vacuum with a gauge and she's steady as a rock at 19/ 500 mm Hg. So no sticky valves or vacuum leaks or similar problems. The carburetor is a Holley 650 double pumper that was very recently rebuilt. Could it be carburetor troubles? Blown power valve? I am considering getting a new Holley 650 with all the technology built into it. Or is there some other problem? Any suggestions welcome.
    Thanks,

    Richard E.
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  2. rbohm

    rbohm Founding Member

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    its sounds like it is starving for fuel or timing advance. start with the ignition and make sure the advance weights are free and moving properly, set your initial timing at around 12 degrees btdc initial, check your vacuum advance for proper operation. i would also retorque the intake at this point as well.

    one more thing, check the amount of slop in the timing chain, if it is excessive the replace it.
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  3. deathsled

    deathsled New Member

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    Bought myself a new Holley 650 Double Pumper no choke horns, stainless steel lines to carb with aircraft style blue and red fittings and an Aeromotive fuel pressure gauge. Car needed this treat. Will see if it irons out the problem. It's gonna look awesome. Four corner idle adjustments too!
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