Reply to "Seeking Advice Concerning How To Correct An Engine Misfire"

bosswrenchMember

Don't remember which Holley you have, but know there are some Holley vac-secondary 4bbls that are made more for emissions than for performance, and they are not necessarily ID-ed as 'emission carbs'. Such Holleys are extremely difficult (or impossible) to tune on a performance 351-C. Double-pumpers are similarly difficult as they ALWAYS run rich. I had one brand new Holley vac-sec on a Pantera in for work, and after weeks, I gave up on getting it to run right and bought a Tuner-Holley with some 18 separate modifications built in. That instantly fixed the problem and yielded better power and added 2 mpg on long trips. May be worth the extra money to you as well.

2/18/192:12 PM

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