Question about 1995 Chevrolet Impala
First thing I'd check is the optispark sub harness. Check both connections, the one by the optispark and the one on the passenger side of the intake manifold. Disconnect both sides and check for corrosion. This is a known weak spot on these motors.
If that checks out your going to want to start with the basics. Do you have spark and fuel? Pull the spark plug wire for a cylinder and using a spark tester test for spark while cranking. You want to have a nice blue spark. If you have good spark check for fuel pressure by hooking up a fuel pressure gauge to the shrader valve on the fuel rail. It should be in the high 40s - low 50s. If you have fuel also, check to make sure the injectors are getting a pulse using a noid light.
Posted on Apr 16, 2009
If you do have spark and fuel pressure then disconnect the coil and lift the injectors out still connected to the rail and turn over the engine to see if they are are clogged or have a nice spray. make sure to disconnect the connector to the coil or you could start a fire.
Posted on Jul 22, 2012
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Posted on Jan 02, 2017
SOURCE: my 1995 impala wont start
have someone listen for the fuel pump to turn on when you turn the key to the on position if you don't hear it then you may need to replace it.
Posted on Apr 14, 2009
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