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Originally Posted by rharmon
I have a '93 s-10 blazer, 4.3 liter vortec engine.
I've replaced the fuel pump, fuel screen, fuel filter, fuel injector assembly, fuel lines, spark plugs, PCM. I have a K&N air filter. The oil and oil filter is changed every 3000 miles. I get between 10-11 MPG in town driving. This is bad. Any suggestions on how to improve this? I think the 02 sensor is ok. I've read that replacing the exhaust system can help. Would it do any good to replace everything from the catalytic cvtr back(pipe, muffler and tailpipe)?
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Check the sidewall print on your tires and see what is suggested for actual tire pressure. You might be surprised.... (and maybe not !
) at what it says.