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-   -   #1&2 injectors not firing (https://www.cherokeeforum.com/f2/1-2-injectors-not-firing-246828/)

Aecon 09-06-2018 11:14 AM

#1&2 injectors not firing
 
2000 sport.

Any ideas why 2 injectors wouldn’t be firing? My thoughts are pcm. Spark plugs are good. I swapped the 2 with another 2 that are working properly. I also swapped around injectors and it’s still the same 2. It was just #2 and then I plugged 1 connector to 2 and now it’s 1 and 2.

fb97xj1 09-06-2018 12:55 PM

Disconnect the battery, and check the injector and PCM connectors for any corrosion, and then test the wiring for each injector, for an open circuit, using a multimeter.

Aecon 09-06-2018 02:43 PM


Originally Posted by fb97xj1 (Post 3513680)
Disconnect the battery, and check the injector and PCM connectors for any corrosion, and then test the wiring for each injector, for an open circuit, using a multimeter.

1 and 2 connectors were pretty tore up at the injector itself so I replaced them. At 1 I have 0v across the two terminals and 13.8 to ground on the energized half. At 2 I have 13.8 across both terminals. 3,4,5 and 6 I have .08v across the terminals and 13.8 to ground on the energized half. Across all 6 between the connector and pcm I have continuity so the wire itself is fine. I did put another 2000 pcm on but it was a 634af not a 635af like mine it wouldn’t stay running but for the few seconds that it would it sounded great and seemed to be firing on all 6. I didn’t have enough time to check for sure but I’m pretty sure it was

Aecon 09-07-2018 07:25 AM

I was finally able to get my scanner and hook it up. I’m getting code p1694 and p0201/02. I cleared the codes but didn’t change anything. I also tried resetting the computer with the positive to ground for 30 second, key on, light on, lights off, key off method. Still the same I have a new pcm coming so hopefully that’s the problem


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