1988 - 1998 (GMT400) Section for all discussion related to the 1987-1998 Chevrolet and GMC trucks.

4.3 won't stay running

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Old Feb 17, 2020 | 7:40 PM
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Default 4.3 won't stay running

I'm working on a 94 c1500 with a 4.3 it starts right up and will idle for about 15 seconds then surge a couple of times and die. If I unplug the map sensor it idles fine and doesn't die. I've replaced the map sensor and it didn't change anything I have checked for vacuum leaks, wiring problems and all connections. If anyone has any ideas I would appreciate it. Thanks in advance.
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Old Feb 17, 2020 | 9:00 PM
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see if this can help
Troubleshooting sensors and how to test
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