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Re: She won't fire up. Please help me! I"m at a complete loss!
how much vacuum does it have at idle?
I've heard that a good tuner can see a motor has a vacuum leak by the fuel trims, or some other way...not sure how. my tuner was surprised when I told him I was chasing a vacuum leak...saying he hadn't seen indications. Sure enough after replacing the intake with a brand new one w/new gaskets, swapping TB's with the one of the LS2 in my TBSS, and I forget what else...I came to the conclusion my low vacuum was in the tune. Told my tuner and he said he could help some, gave it another inch or two...but still not where it was with the carb. Then another tuner tells me my motor will never make as much vacuum efi as it did carb'd. I ws like.......huh?
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Kurt -
'68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy
'72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close
'06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD
'18 Kia Sorento - wife's econo-driver
'95 Chevy S10 - reg cab shortbed, LS, 4.3, auto...
my '68's powertrain and chassis build -links broken
A surprise phase - carb to efi -links broken
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