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12-15-2004, 12:02 PM
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North Coast, baby!
Join Date: Jun 2004
Location: Toledo, OH
Posts: 437
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outside vacuum source
Okay, my tuning manual says to set the rear vacuum diaphragm using an outside vacuum source. What or how do I accomplish this? I am trying to dial in my 79 rochester M4MC 4bbl carb. It has a non electric automatic choke which is giving me fits right now. It fires up good but starts to stumble bad after a few seconds. After about a minute or two it will "correct" itself and run fine. I seem to be getting bad fuel economy as well. Any ideas?
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Brad 79 Scottsdale C20  350/350 3.73's Still running full CA smog gear! 
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12-15-2004, 01:12 PM
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www.73-87chevytrucks.com
 
Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
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I would use a Mighty Vac.
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Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
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12-16-2004, 10:26 AM
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North Coast, baby!
Join Date: Jun 2004
Location: Toledo, OH
Posts: 437
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Okay...whats a mighty vac? I have no idea what they are talking about or how to do it. Anyone done this before? I'm afraid someone is going to have to hold my hand here to get me through this.
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Brad 79 Scottsdale C20 350/350 3.73's Still running full CA smog gear!
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12-16-2004, 02:37 PM
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Project 2 Resume
Join Date: May 2004
Location: Jim Thorpe, PA
Posts: 884
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You can pick up something like this...
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John 1984 C30 Chevy Crew Cab Dually 1998 Jeep Cherokee 4x4 2004 Chevy Trailblazer 4x4 (wife's) 1970 Mustang FB fully tubed (getting 521 BBF & powerglide) 1978 Nova 2dr (going BBCaddy & S.P. th400) 1984 Monte SS (circle track car) |
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Linear Mode
