Ignition disable - JeepForum.com

 
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post #1 of 7 Old 01-23-2014, 11:50 AM Thread Starter
AlC
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Ignition disable

I intend to replace my oil pump and want to crank the motor until I see oil pressure.
Obviously don't want it to fire up until then so any suggestions for a simple way to disable the ignition?

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post #2 of 7 Old 01-23-2014, 12:41 PM
CCKen
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Remove the following fuses from your PDC:

IGN RAIL COIL FUEL INJECTORS and ASD to be sure.


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post #3 of 7 Old 01-23-2014, 06:55 PM Thread Starter
AlC
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Exactly what I was looking for.......Thank You!
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post #4 of 7 Old 01-23-2014, 08:14 PM
landude
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Hey, Ken you have a few in backwards....
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post #5 of 7 Old 01-24-2014, 03:30 AM
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Quote:
Originally Posted by landude View Post
Hey, Ken you have a few in backwards....
Explain.
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post #6 of 7 Old 01-24-2014, 06:51 AM
KF4SQB
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Ken, I think he's making a joke. The numbers on some on your fuses are turned a different direction than others.

For the original question: doesn't the 4.0's oil pump drive off of the bottom of the distributor shaft? My brother uses a nifty little trick for Ford and Chevy engines for this very purpose. Remove the drive gear from the shaft of an old distributor, gut the internals out of the distributor, and slide it down into the block, making sure it engages with the oil pump. Then, chuck a drill to the top of the shaft, and run the drill until you see oil pressure, plus an additional 15-20 seconds. You've now primed the entire engine, without turning it over.

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post #7 of 7 Old 01-24-2014, 07:15 AM
CCKen
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Quote:
Originally Posted by KF4SQB View Post
Ken, I think he's making a joke. The numbers on some on your fuses are turned a different direction than others.

I figured as much but was wondering what he meant by "Backwards".

For the original question: doesn't the 4.0's oil pump drive off of the bottom of the distributor shaft? My brother uses a nifty little trick for Ford and Chevy engines for this very purpose. Remove the drive gear from the shaft of an old distributor, gut the internals out of the distributor, and slide it down into the block, making sure it engages with the oil pump. Then, chuck a drill to the top of the shaft, and run the drill until you see oil pressure, plus an additional 15-20 seconds. You've now primed the entire engine, without turning it over.
Yes, the oil pump is driven by the distributor drive shaft (pre-2000) and by the Oil Pump Drive/Cam Position Sensor shaft (2000/2001).

I did exactly what your brother did on my '99. Works good.
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