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  ever here of holley dp do this?

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Author Topic:   ever here of holley dp do this?
stoker
Gearhead

Posts: 142
From: folsom,cal,
Registered: Jan 2002

posted 01-03-2003 08:11 PM     Click Here to See the Profile for stoker   Click Here to Email stoker     Edit/Delete Message   Reply w/Quote
installed pro form main body to get extra 100 cfm last week.had to jump way up in jetting but thats tipacle.car responded vary well to down leg booster and extra cfm.nice crisp throttle response throughout rpm range.here is prob ,when starting dead cold motor will lite without ever touching loud petal and sometimes will backfire extremly loud out exhaust and die!! then it takes some peddle pumping to get fired.i guess it is trickling fuel into manifold and puddling over nite,but i looked all the way down intake plenum with surgeons probe flashlite and cant see any fuel.even techs at proform are stumped

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steve'66
Gearhead

Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000

posted 01-03-2003 09:39 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
You didn't do anything else, just the carb mod right?

Soes it run right after you fire it up the second time?

SteveW

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stoker
Gearhead

Posts: 142
From: folsom,cal,
Registered: Jan 2002

posted 01-03-2003 11:16 PM     Click Here to See the Profile for stoker   Click Here to Email stoker     Edit/Delete Message   Reply w/Quote
steve,just did carb mod,nothing else.i can start it in morning without depressing loud pedal,but it will run for only couple seconds then die.then i have to depress pedal half way (to activate acc. pump)it then fires and i have to feather pedal for about a minute befor it will idle on its own (typical dp without choke)float levels are ok.set idle mixture screws with vacumm gauge (dont have sec. mixture screws)twice it backfired at initial turn of key (only did this when sat overnite)it is an exaust backfire with long flames and enough noise to startle neighbors several blocks away

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Mpcoluv
Gearhead

Posts: 945
From: Charlotte NC usa
Registered: Apr 2001

posted 01-04-2003 09:37 AM     Click Here to See the Profile for Mpcoluv   Click Here to Email Mpcoluv     Edit/Delete Message   Reply w/Quote
It's not dribbling a little gas down into the plenum after you shut it off is it?

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stoker
Gearhead

Posts: 142
From: folsom,cal,
Registered: Jan 2002

posted 01-04-2003 10:06 AM     Click Here to See the Profile for stoker   Click Here to Email stoker     Edit/Delete Message   Reply w/Quote
i dont see any fuel dribbling.if it was wouldnt have to come from squirters or boosters?i would think if there was tiny amount would evaporate.when i shut down hot engine and pull air cleaner there is strong vapor smell (just dont see it).obviosly some gas is making into motor cause like i said,when starting first thing in morning without touching accelerator it lites instatanious and runs for brief period.then to restart it acts like normal dp without choke (requires fuel from acc. pump)

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