1989 Jeep Cherokee my jeep has no injector pulse

1989 JEEP CHEROKEE
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JEEPMAN31491
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  • 2 POSTS
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.
Jan 12, 2009 at 11:42 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JNOVACK
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  • 723 POSTS
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


https://images.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.


https://images.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.


https://images.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.
Jan 12, 2009 at 8:08 PM
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