It's easiest to check for either a spark or fuel pressure first. To check for fuel pressure, connect a pressure gauge to the fuel pressure releif valve. It is located in front of the distributor, usually has a black, plastic screw-on cap on it; once the cap is removed (by hand) it reveils a "stem" which resembles a valve stem on a tire. Attach the pressure gauge here. Pressure should be around 50- 60 psi if the pump is working properly. Much lower than that (say 20 -35 psi) the engine might start and then stall or just act as if it is going to start. Even if low pressure is confirmed check the fuel filter before condemming the fuel pump.
To check for a spark remove a spark plug wire from a spark plug and place it about 1/4" to 1/2" from ground (usually a nut or bolt) spin the engine over as if you are trying to start it. Look for a spark. If one is present replace the spark plug wire onto the spark plug and check another wire the same as you did the first. If you get a spark there also, then the problem is most likely not the ignition system. If you don't get a spark at either, check to make sure that the distributor is getting battery voltage with the key on. If it gets battery voltage but still no spark, you'll have to test the crank sensors, Ignition control module (ICM), wiring from ICM to PCM, etc. If that's the case I can get that info to you. Let me know how this works. If necessary I'll try to give you more information.
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Friday, January 29th, 2021 AT 12:45 PM
