89 Jeep Cherokee Won't Start No Fuel Injector Pulse

There's was a fairly long section in there about the Cam sensor failure in there dealing with the 87 recall. The wires from the distributor were breaking and the diagnostic they give was no injector pulse. There is also a separate ground for the injectors and one Jeep mechanic at the local dealer was showing me where he had problems in that big hulking connector on the firewall with that, so that's also a good start, too. The cam sensor is easy enough to check - one pulse per revolution of the engine. It's a Hall Effect switch just like the Crank sensor.

I've dealt with the crapped out crank sensor and the limp home mode. Boy! Is that ever an appropriate decription. It would start and idle but anything much above idle it work buck and load down immediately. I came home basically at idle playing with the gears all the way. I think I got 1000 rpm max - sure did irritate the folks who got stuck behind me. Even 5th gear at 1000 RPM makes the tortise look fast. I guess if they know the crank angle from the CPS they could fire both ignition and injectors for each pair of cylinders together but they would still have to know where #1 was and I don't remember any unique notch pattern on the flywheel ring that would tell them that.

-- Will Honea