1994 Chevrolet Lumina Codes 35 42 Car Will Start About 10 Minutes Dies

1994 CHEVROLET LUMINA
154,000 MILES
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what are the codes 35 and 42, my car will start for about 10 minutes then dies. I have replaced the map sensor, the throttle position sensor, and the idle air control valve. Please help
Jan 16, 2013 at 8:35 PM
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JACOBANDNICKOLAS
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DTC - 35 IAC problem or idle error

DTC - 42 Ignition bypass circuit error

Are you able to keep the engine running if you give it gas? Have you checked fuel pressure? Does it always start right back up?
Jan 16, 2013 at 8:59 PM
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