Author Topic: engine vibration  (Read 6869 times)

Offline 1979C20

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Re: engine vibration
« Reply #15 on: May 28, 2011, 02:57:25 am »
So does that mean the EGR is ported?
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF

Offline TexasRed

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Re: engine vibration
« Reply #16 on: May 28, 2011, 06:37:00 am »
Well, on the TBI, you shouldn't have vacuum unless you're off idle and certain conditions are met. On carbs, the EGR is ported.