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SpeedJunkyz
March 13th, 2008, 11:07 PM
Question: 1999 Honda Civic EX mileage: 98,000. On acceleration anything below 2800-3000 rpm the car hesitates and just lacking power but above 3000 rpm it accelerates just fine. I have replaced everything from the rotor all the way to the plugs, I took it to the dealership, they did diagnostics, and everything checks out. I had changed the exhaust from the catalytic back to a performance exhaust with 2.25 piping and the mechanics said that this was the problem due to lack of back-pressure to the cylinders but the problem existed prior to the exhaust change so I believe the mechanic was giving me a SWAG. Do you have any ideas?

Answer: Your MAP sensor probably is giving you a weak signal. If not, scan the data stream that goes to the computer when you experience the problem.