P0400 code
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Cruising
Joined: Aug 2025
Posts: 12
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P0400 code
Have a 96 LT1, replaced solenoid. Also tested valve seems to be working and cleaned it out with throttle body cleaner. Passages seem to be clear, when valve is pressed in manually engine stumbles. Checked the vacuum lines they appear to be in good shape and just did some basic suction testing with them. Car runs great still just trying to get the light off. Anyone run into this?
