Alright so i have aboubt a quarter tank of gas. Fuel isnt a problem but the spark is. I replaced the distributor, dist. cap, rotor, and coil. Still no spark. What the HELL is the problem...Please help me out its aweful not being able to drive my baby

 

Connections to Spark Components. Check CPS with a DMM as it plays a role in spark timing.

 

CPS Testing



TESTING PROCEDURE 1991 – 2001 4.0L H.O. engines
1. Near the rear of intake manifold, disconnect sensor pigtail harness connector from main wiring harness.
2. Place an ohmmeter across terminals B and C (SEE Image). Ohmmeter should be set to 1K-to-1OK scale for this test.
3. The meter reading should be open (infinite resistance). Replace sensor if a low resistance is indicated.

TESTING PROCECURE for 1987 – 1990 4.0 L engines

Test # 1 · Get a volt/ohm meter and set it to read 0 - 500 ohms. Unplug the CPS and measure across the CPS connector's A & B leads. Your meter should show a CPS resistance of between 125 - 275 ohms. If the CPS is out of that range by much, replace it.


Test # 2. Set the volt/ohm meter to read 0 - 5 AC volts or the closest AC Volts scale your meter has to this range. Measure across the CPS leads for voltage generated as your helper cranks the engine. (The engine can't fire up without the CPS connected but watch for moving parts just the same!) The meter should show .5 - .8 VAC when cranking. (That's between 1/2 and 1 volt AC.) If it's below .5vac, replace it.

 

i had the same problem last week, and replaced the crank sensor. its at 11:00 oclock on your bell housing. it takes 10 min to replace. tip take your old one in with you so you get the correct plug.

 

Thanx for all the help guys. I don't think its CPS cuz all the current is there just no spark
How much is a crank sensor or can i just fix it myself?