To ckeck for spark at the spark plugs, you pull spark plug wire loose. Use a known good spark plug or spark tester in the plug boot. Ground/touch metal part of tester to metal part of engine. The spark tester usually has a clip that will hold it. It's probably best not to hold anything in your hand, secondary ignition voltage will bite. I hasn't killed me yet, but, I still don't like it. Test with engine cranking.
You can use a fuel pressure gage to check fuel pressure. There should be a schrader valve on the fuel system under the hood. Some of the national brand autostores used to loan out a fuel pressure, tell them what your going to use it on, GM and ford schrader valves, may not be the same thread or whatever.
The autostore also sells obd2 code readers, it plugs into your datalink connector. If you go that way, make sure you read on the package, see if it works on your vehicle.
Tuesday, January 11th, 2011 AT 8:36 PM