Question about 1997 Chevrolet Astro

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1991 astro Van 4.3L seems to run ok at low speed and the when going above 40 mph it bogs down. Could this be the carb or EFI?

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  • Anonymous Mar 31, 2014

    goin down the highway something in the drivetrain

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This could be the carb or fuel injection system in need of severe maintanence but I would recommend checking a few other things as well as checking the fuel injection system or carb. I would also have the catalytic converter checked out and go ahead and perform a basic tune up (i.e. plugs, wires, cap, rotor, fuel filter, air filter). These are some basic things that can cause engine power loss. If after a basic tune up is done and the problem still persists, some other places to look are idle air speed cylinoid, M.A.P. sensor (Manifold Absolute Pressure sensor), and O2 sensor (oxygen sensor). These are other components that can cause the same reaction you speak of. I would recommend a lap scan diagnostics test be ran at your local auto tech. Hope this helps, good luck!

Posted on May 11, 2009

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