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Old 10-22-2014, 09:43 PM   #7
jeffcoslacker
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Re: 98 lumina will start a couple times then die

When this happens, have you tried starting it with various levels of throttle?

About half throttle will overcome a huge vacuum leak, like a stuck EGR or Idle Air Control, and it will start, but won't idle when you drop the throttle if that's the problem.

I doubt it's flooding or you probably would have noticed fuel odor and wet plug clearing once started, but holding the throttle to the floor all the way while cranking will put the PCM in "Clear Flood Mode" and shut the injectors off. A nice little tidbit of programming, since most people were used to clearing a flooded carbureted engine this way....
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