I have put my car on a diagnostic tester and nothing shows that something is wrong with my car but it will not go over 20 miles and it bucks and it is also backfiring. When I do get it to go over 30 miles it does pick up speed but once I hit the brakes the problem starts all over again. Can someone help me figure out what is wrong with my car before I decide to get it fixed. It has over 220, 000 miles on it. Love the car very good on gas and very very quiet. And I only drive it at the most 50 miles a week.
1989 Chevy Lumina been tested on the diagnostic tester?
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