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I have a 1988 Chevy S-10 pick up with a 2.8 engine. When I first start it the engine spits and sputters and has no power until the engine gets to normal operating temp. This usually takes 15 minutes or so. I have changed the plugs and wires, the rotor button and distributor cap. I have changed the oil and air filter as well. Still runs terrible till it warms up. Don't know what to try next. Got any ideas?

In most case people overlook the 4 fuel pump tests on today’s cars. On a T.B.I. (Throttle Body Injected) the fuel pressure should be 12 PSI the book says 9 to 13 PSI. In my experience anything less than 12 PSI is a problem that needs to be addressed. You will need to find a shop to do these tests unless you have the test equipment. This equipment including a lab scope can cost thousands of dollars. So it is best to find a shop that has the right equipment and training. This would have been the best thing to have done, looking in retrospect. Go to my website and click on the Tech training link. You will see the 4 tests needed to diagnose a faulty fuel pump.


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