Expert: keith - 5/18/2005

Question
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Followup To
Question -
Last month, I wrote to you guys about my wife's 1991 Chevy Lumina V-6 3.1.  To refresh the original problem, one day my wife used the car and it ran fine.  The next day, it wouldn't turn over.  The car is apparently getting gas and has plenty of crank/battery.  The recommendation last month was to replace the MAP SENSOR.  I did so and the car fired right up and ran great for a month plus.  Yesterday, the car did the exact same thing, so I figured I'd replace the map sensor again (which my auto parts store exchanged for me) and the car still doesn't start. It still has crank/battery and getting fuel.  Any chance the replacement MAP SENSOR is bad or could it be something else?
Thanks for your help!  Mike O.
Answer -
hi micheal, there are several possible casuses to your problem. you said "it wouldn't turn over" does the engine crank? does it have spark on the spark plugs? is it getting too much gas? try starting it in "clear flood mode" this is done by pressing the fuel pedal all the way to the floor and turning the key on and off three times (quickly) while keeping the pedal to the floor. clear flood mode deactivates when you release the fuel pedal. if i can be of futher assistance reply back i hope this gives you some direction    thanks keith

Sorry Keith, but the "clear flood mode" didn't work.  Yes the car has crank and has spark, but won't start.  Any other suggestions?

Answer
hi mike,sorry that didnt work for you, i would suggest that you do a compression test an all six cylinders, and do a fuel pressure test at the fuel rail, and you could try putting some fuel in the intake at the throttle body just a little (about 50ml or so) if it starts then you have a fuel problem, try not to spill any on the engine it may ignite. if i can offer you more help, let me know how it goes. thanks keith