1989 Jeep Cherokee my Jeep has no injector Pulse

Tiny
JEEPMAN31491
  • MEMBER
  • 1989 JEEP CHEROKEE
Electrical problem
1989 Jeep Cherokee 6 cyl Four Wheel Drive Automatic 0

Hi, I am having some problems with my jeep I have no pulse. I have checked every fuse and all of them are still good. I am horrible with electrical. I have spark and fuel in the fuel rail too. Please help.
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Monday, January 12th, 2009 AT 11:42 AM

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Tiny
JNOVACK
  • EXPERT
Check fuel pressure it should be 31 PSI(Pounds per Square Inch) also here is the testing for injector

TESTING

See Figures 2, 3 and 4


http://www.2carpros.com/forum/automotive_pictures/52960_0900c152800a9c3f_1.jpg



Fig. 2: Checking the circuit resistance between diagnostic connector terminal 6 and fuel injector connector B
With the ignition key/switch in the OFF position, unplug the fuel injector 2-way connector and use an ohmmeter to check the resistance between terminal B of the injector connector and terminal 6 of the diagnostic connector. If the resistance measures greater than 5 ohms, repair the open circuit between those terminals.


http://www.2carpros.com/forum/automotive_pictures/52960_0900c152800a9c40_1.jpg



Fig. 3: Checking resistance between terminal A of the injector connector and a good ground
If the resistance measures below 5 ohms, check the resistance between terminal A of the injector connector and a good ground.
If the resistance measures below 5 ohms, turn the ignition key/switch to the OFF position and unplug the ECU connector, then check the resistance between terminal A of the injector connector and a good ground.
If the resistance measures greater than 5 ohms, replace the ECU.
Connect the ECU connector.


http://www.2carpros.com/forum/automotive_pictures/52960_0900c152800a9c41_1.jpg



Fig. 4: Checking resistance across the terminals of the fuel injector
Check the resistance across the fuel injector terminals. If the resistance measures greater than 5 ohms, replace the fuel injector.
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Monday, January 12th, 2009 AT 8:08 PM

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