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73-87 Chevy _ GMC Trucks => Performance => Topic started by: str8bloc on September 24, 2009, 07:57:05 PM

Title: vacumn gague tuning
Post by: str8bloc on September 24, 2009, 07:57:05 PM
i have a 86 350 with r45ts .50 thous accel coil edelbrock 600 carb 2.5 tru duals with cherrybomb glasspacks  i hooked up my vacumn gague on my vac adv with a T to manifold vacumn and im getting 15hg when i rev it drops 10 to when i drive it sputters when i give it full throttle how do i time and adjust my air fuel do i plug off vacum or do i leave it in the T . when i drive it and let it sit about 5 mins its takes a sec to start when its been off overnight it takes 2 pumps and it starts
Title: Re: vacumn gague tuning
Post by: team39763 on September 26, 2009, 05:46:58 PM
I was having similar problems with my truck too.  It's a completely different setup from yours, but they sound like they have similar problems.  Mine usually takes a pump or two to start it also.  Before I tore the motor apart, one thing that helped a lot was a good intake seal...my intake gaskets were all blasted out and causing a major vacuum leak.  My truck ran a bunch better after that.  Hopefully somebody else jumps in here with some suggestions.
Title: Re: vacumn gague tuning
Post by: str8bloc on September 26, 2009, 07:14:46 PM
well i threw my accel u groove plugs at .45 and its runnin greaat  now no more sputter on top end
Title: Re: vacumn gague tuning
Post by: team39763 on September 26, 2009, 11:39:17 PM
Were you having trouble with fouling out plugs?  My motor seemed to foul plugs like crazy.  I may mess with my plug gaps too and see if that helps.  I think I had mine set at .035.