changed #4 plug and installed a new coil and still is missing. the plug is carbon fouled, don't know what to check next?
Jan 19, 2015 at 6:05 AM
2004 Jeep Liberty code po304
2004 JEEP LIBERTY
RONALDVARGA
- MEMBER
- 6 POSTS
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JACOBANDNICKOLAS
- ✓ASE Certified Mechanic
- 110,194 POSTS
I need three things checked and in this order,
1) Remove the #4 plug and ground it to check for spark to that plug. If you have spark, go to #2
2) Check for an injector pulse to the #4 fuel injector. If there is a pulse, go to #3
3) Complete a compression test on cylinder 4 to confirm there is adequit compression.
Do this and let me know what you find.
1) Remove the #4 plug and ground it to check for spark to that plug. If you have spark, go to #2
2) Check for an injector pulse to the #4 fuel injector. If there is a pulse, go to #3
3) Complete a compression test on cylinder 4 to confirm there is adequit compression.
Do this and let me know what you find.
Jan 19, 2015 at 6:12 AM
NO INJECTOR PULSE FOUND.
Jan 19, 2015 at 7:28 AM
no injector pulse .
Jan 19, 2015 at 7:44 AM
JACOBANDNICKOLAS
- ✓ASE Certified Mechanic
- 110,194 POSTS
That will cause it. The first thing you need to do is a visual inspection of the wiring to that injector. Make sure it is not damaged or shorting. Also, check all connections to make sure the pins are not pushed out of place and they are not corroded. Let me know what you find.
Jan 19, 2015 at 12:03 PM
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