very high air/fuel ratio...sputtering...bad gas?

mamatried

New Member
Sep 28, 2004
21
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Kentucky
i finally got my wideband hooked up and my car at idle is running at 20:1 afr which is way high. even when i rev up on the engine the ratio only drops to about 16:1. I've adjusted my fuel pressure from 40 to 30 psi and it had no affect! i have 30# injectors too. it has new plugs, coil, rotor and cap. i know i'm getting fire but i'm running way too lean. i know its has the same tank of gas in it for a couple years could this be causing it to miss and have such a lean mixture??
 
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The typical response to a lean condition is to increase fuel pressure, not lower it. Still, with 30s you shouldn't have had the issue at 40 psi in the first place. Is your MAF calibrated to the 30lbs injectors? Have you replaced the fuel filter recently? Did you connect it backwards? Is the wideband getting hot enough to take an accurate reading? Are you measuring the pressure at idle? When you plug the vacuum into fuel pressure regulator, how much does it drop?