Check the fuel pump fuse first. When it's very quiet, put your head right up near the gas tank (and hope it doesn't explode) while someone turns the key to 'on'. You should hear the pump run for two seconds. If you can't hear it run or are not sure, as per above, you can remove the pump relay and jump the terminals to make it run constant. If the pump only runs with the jumper wire, the relay may be bad. If you can't get the pump to run at all, the pump may be shot or there is some other wiring problem to the pump.
Pull the #1 spark plug closest to the battery. Carefully ground it while someone cranks the engine to check for spark and for fuel coming out the plug hole.
You're now checking the FACTS-
Fuel
Air
Compression
Timing
Spark
If you have spark and fuel, assume you have air and compression, so how 'bout timing? Did the timing belt or tensioner break? It could also be the crank position sensor or a bunch of other stuff.
I checked my Isuzu archives and I have an Isuzu tech video for a hard start/no start condition. I covers a whole lotta stuff you won't wanna check yourself, but you may pick up a few things to check on your own.
31.1 MB, 17:24, Real Movie file only-
http://www.drivehq.com/file/df.aspx/publish/mgpa/vids/hardstart.rm
I guess you need a Real Player to see it? I tried to convert it to a wmv or mpg, but I don't have a program to convert rm movies to other formats.
Mark Griffin
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