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injector fuse

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pjb
New User

Jan 26, 2020, 3:08 PM

Post #1 of 4 (1920 views)
injector fuse Sign In
03 Jeep G.C. 4.7 HO keeps blowing injector fuse on hard acceleration. New starter and alternator were installed before this started acting up along with rear upper control arm and ball joint. It will put up code 1389 which I will clear and put new fuse in and it starts when I put new 15 amp fuse in and it will run fine as long as I don't accelerate hard. Thank you all for your time. Phil


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 26, 2020, 4:25 PM

Post #2 of 4 (1914 views)
Re: injector fuse Sign In
Specifically, which fuse is blowing? Fuse number?

This appears to be a lot more than simply the injectors.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Jan 26, 2020, 4:28 PM)


pjb
New User

Jan 26, 2020, 7:32 PM

Post #3 of 4 (1894 views)
Re: injector fuse Sign In
FUSE NO. 26 INJECTORS, CODE 1389


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 27, 2020, 7:09 AM

Post #4 of 4 (1862 views)
Re: injector fuse Sign In
The code P1389 is monitoring the output of the ASD relay after the specified fuse.

That branch of the circuit feeds the power supply to the injectors so you likely have a bad injector or a problem with the wiring going to them.

The first step may be to test the resistance of all the injectors. The one with the lowest resistance would be the bad one.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Jan 27, 2020, 7:11 AM)





 
 
 






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