1991 Pontiac Trans Sport 3.1L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, MIL Lamp on
found fuel pressure high around 18 lbs i have a spec of 9-13 we have checked the return line and replaced the regulator in throttle body without any decrease in pressure. then tried another complete throttle body. dead headed fuel pressure is 20lbs fuel volume...
FIX posted 3/22/2007
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Message Closed w/FIX
Vehicle Data1991 Pontiac Trans Sport
Trouble Codes
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Message Closed w/FIX
Vehicle Data
1991 Pontiac Trans Sport
VIN | 1GMCU06D2M |
Engine | 3.1 L / 6 cyl / GAS |
Trans | 3-speed Automatic |
Delivery | FI / tbi |
Emissions | fed |
Symptoms | Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, MIL Lamp On |
Occurs | Always, After a Hot Soak |
Trouble Codes
45 | rich exhaust |