1999 chevy tracker, no power, can't get over
I assume you have already checked your air filter and air inlet for clogging. Another simple diagnostic is to sniff the exhaust when the engine is cold. If it smells very dirty or like unburned gasoline, you either have too rich a mixture or ignition problems.
If that is not the issue, verify that your fuel system has adequate pressure, and that it holds pressure when the engine is accelerated. Most fuel injection systems have a Schrader valve somewhere under the hood for this purpose, and for safely releasing fuel pressure for service. You'll need to get a pressure gauge designed for this purpose - many auto parts stores have some sort of tool deposit/loan program so you don't have to buy it outright. Inadequate fuel pressure can be due to a faulty pressure regulator, failing fuel pump, dented or kinked fuel line, or clogged fuel pump inlet screen.
Another possible cause for poor high-speed performance is a slipping torque converter. However, there will be a noticeable difference between engine acceleration and vehicle acceleration in this case (engine RPM will jump, but the car will crawl).
on Oct 01, 2011