1988 chevy beretta car will not pump fuel at fuel injector put in new injector but still does not pump
Skinnymin, you need to understand what and how injectors work. They do not pump, all they do is open from an electrical signal and let pressurized fuel spray out the bottom of the injector. Your beretta is either not getting the signal to the injectors to open them, or the fuel pump in your gas tank is not working to pressurize the line to the injector. In most cases, it is a faulty fuel; pump. Do yopu know if your pump is working? Here is a check: since the fan comes on with key, you may have difficulty hearing the pump, so have a helper. With the gas filler cap off, stand as close as you can get to the tank and listen for the pump to whirr on for about 2 or 3 seconds when the key is turned to on. It's supposed to turn on with key on to pressurize the lines, and if the car is not then turned to crank,. the pump will turn off until the car is cranked over-you can't hear the pump when the car is cranking or running, but you should hear the pump come on with keyt on for about 2 seconds. If you hear nothing from the tank., suspect a bad pump, or a wiring prtoblem with it not coming on. If you do hear the pump's whine( or whirr, or buzz), then pull off the electrical connector to the injector and check for power on one of the two wires in the connector with the key to on. One is a hot wire and is constant voltage with key on. The other wire is a ground for the injector. When the computer briefly grounds the injector wire ground, the injector is energized, raising a little pin on bottom of injector, for fuel to spray out. Understand it better now? So, check your fuel pump, if it is working, check the injector circuit.
The fan circuit is a tricky little apparatus, too. Includes the electronic coolant temperature sensor -ECT sensor- ( the temp. sensor for the computer, not the one for your dash gauge), also a fan relay and the computer. The computer turns on the relay for the fans when the temp. sensor gets to a certain temperature. You may just have a faulty ECT sensor or a faulty relay. In most cases, it is a bad sensor.Good luck with your '88.
Dec 13, 2012 |
1988 Chevrolet Beretta