The vehicle is a 93 Wrangler (Not Mine, I have a IH Scout II) with a 4.0 S6 that will not run. Ether sprayed into the manifold will allow it to start and run for about 10 seconds, then nothing. There is good spark and the coil resistance is around 14K Ohms. I have fuel at the pressure releif valve on the rail so I think the fuel pump is OK. I can't verify that the injectors are spraying because frankly I haven't a clue how to check. (I have a 30 year old Scout remember) Someone on another board suggested a crank sensor but I can't find that either. Please feel free to share my insanity.
I have '93 XJ, When my crank sensor went out There was no spark at all. (I believe is what sends the message to spark)Mine is on the top of the flywheel, and an incredible %*%# to change. Hope that helps some, others here are far sharper then I. Good luck
Thanks muchly. At this point, I am getting a lot less fuel out of the valve on the rail. I replaced the in-line filter so I guess I'll just yank the tank and replace the fuel pump.. The one on it is the original so even if it doesn't fix the problem it's gonna need one eventually.
Turns out it was the ground wire to the fuel pump. There was so much corrosion on the terminal that it was not concucting at all. A 7 cent wire caused a four hour job. But on the bright side at least it's got a new pump.