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Old 04-03-2011, 11:22 AM
Earlyboomer Earlyboomer is offline
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Join Date: Mar 2011
Posts: 25
Default Re: Fuel deliver troubleshooting for an 88 2.9L?

Besides a temperature sensor being out of calibration and lying to the computer and killing the MPG, the O2 sensor can do the same thing. Also, the fuel pressure regulator's diaphram could have developed a leak. Pull the fuel regulator vacuum line off at the intake manifold, and there should be no smell of gasoline in that line, if you smell gas, the regulator is bad. A bad regulator allows extra fuel right into the intake.
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