Mechanics

POOR GAS MILLAGE/ROUGH IDLE/SMELL G

1998 Oldsmobile Bravada

Engine Performance problem
1998 Oldsmobile Bravada 6 cyl All Wheel Drive Automatic 130000 miles

idles rough, poor gas millage, smell gas and hard to start after first start up and run for a short period of time. I was told by an auto store that it was a vacumn leak. Were would I look for this leak. Thanks very much for your help.
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GGAISBAUER
February 11, 2010.



If this is a Vortec CPI spider injection engine-you need to check the fuel pressure. Pressure regulator could be leaking open upper intake plenum and investigate also check the nut kit/poppet valves

Rasmataz
Feb 16, 2010.