He says the fuel rail is pressurized and has no injector pulse - can
you think of anything besides the cam sensor that would inhibit the
injectors but not the spark? I assumed that the fuel pressure stayed
up during cranking. That long crank to start the Renix MPI 4.0 like
ours appears to be due to waiting for the #1 tdc pulse before putting
fuel to the cylinders. This also sounds a lot like the recall for the
'87 XJ/MJ where the Cam sensor leads were breaking off at the
distributor.

On Wed, 11 May 2005 18:03:11 UTC Mike Romain >
wrote:

> There is a ballast resistor out on the drivers side fender near the rad
> that controls the power to the fuel pump.
>
> Do you hear the pump hum when the key is first turned on?
>
> When was the last time the fuel filter was changed? It is on the frame
> rail just in front of the tank, drivers side.
>
> The pump also needs a ground which is supplied via the mesh strap from
> the rear of the head to the firewall. I test that by putting a booster
> cable from the battery negative tot he firewall to see if they start
> then.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> wrote:
> >
> > Hey,
> > actually Help!
> >
> > Here's my symptoms:
> >
> > 1. Cranks fine
> > 2. Lots of good spark
> > 3. Timing was set TDC on compression stroke.. verified twice.
> > 4. Fuel Rail is pressurized
> > 5. Crank Pos Sensor functional (as far as we can tell)
> > 6. Map Sensor Functional (voltage too the sensor)
> > 7. Throttle Position Sensor is functional
> >
> > Big clue is the following and explains why its not firing:
> >
> > We stuck a Noid light on two or three injector plugs and
> > there's no pulsing to the injectors. This explains the lack
> > of starting. But WHY??? What could cause the fuel injectors not
> > to be pulsed.
> >
> > We haven't done a compression test but we've got a professionally
> > built long block so I'm not sure it needs to be done...
> >
> > Any thoughts or insight would be appreciated..
> > HELP HELP HELP
> >
> > Thanks
> >
> > James


--
Will Honea