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    Engine starts runs for 5 or 6 seconds then dies.

    I have a 1998 Suburban K1500 5.7 vortec. Starts and runs like a dream for 5 or 6 seconds then slowly sputters out. If I touch the throttle during the 6 seconds it immediately konks out. If I unplug the maf and map sensors it will keep running, nice and smooth, respond to throttle etc. (default...
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