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1996 GMC Sonoma Question: Ireplaced the map sensor but I still get code saying hi voltage map sensor. Rep

 

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outlaw74.mj, 2.2L 4 Cylinder, Willis, TX, January 15, 2014, 13:31
 Rookie

Replaced plugs fuel injectors and egr valve as well. But code returns. Engine wont start. I believe all started from someone contaminated gas. Drained and treated and replaced filter as well

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  • Answer #1

    pushrod January 15, 2014, 13:44
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     Master

    Check for spark at the plugs and fuel pressure.

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    outlaw74.mj, January 15, 2014, 13:55
     Rookie

    Yes replaced plugs and have fire. How to test fuel pressure inside tank. We have plenty of pressure visually big amount in degrees indeterminate

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    pushrod, January 15, 2014, 14:02
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     Master

    There should be a pressue test port at the engine. Maybe it still has whatever in the tank! What was in it, water??? Did you remove the tank to clean it out?

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  • Answer #2

    ziptie12 January 15, 2014, 16:16
     Master

    Inspect wiring to map sensor for rodent or other kind of damage.

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