the van only goes 20mph even when your foot is on the gas pedel,
Chevrolet Q&AAsk Your Question
1997 Chevrolet Astro Question: how to replace the speed sensor?
Answer #1mastertech6371 August 11, 2010, 22:02Master
sounds like a clogged cat converter. go to a shop and have it checked.
Answer #2patrick mannion from Greg Solow's Engine Room, August 12, 2010, 01:35Master
Agree with Roy, clogged Cat Converter or insufficient fuel pressure or fuel pump volume!