1971 Chevy Impala 400 small block stalls

Asked by bmeupscotty May 06, 2019 at 09:56 PM about the 1971 Chevrolet Impala

Question type: Maintenance & Repair

1971 Chevy Impala Convertible, 400 small block.  Car will stumble briefly then  
stall completely at highway speeds due to no fuel getting to carb. Gas tank
builds up vacuum.  Can prevent by leaving gas cap loose but with cap behind
rear license place this is not a good fix.  

1 Answer


The gas tank vent is plugged up.

1 people found this helpful.

Your Answer:


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