INJECTOR HELP
Fleet Owner
Joined: Nov 2003
Posts: 27,885
Likes: 3,599
Any codes?
Any mods?
Have you verified that batteries are strong (load test individually)?
Have you checked FICM voltages?
What oil do you use and how old is it?
How old are your fuel filters?
Drained the primary fuel filter recently to check fuel quality?
Do you have gauges - like a fuel pressure gauge?
Any mods?
Have you verified that batteries are strong (load test individually)?
Have you checked FICM voltages?
What oil do you use and how old is it?
How old are your fuel filters?
Drained the primary fuel filter recently to check fuel quality?
Do you have gauges - like a fuel pressure gauge?
Thread Starter
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Senior User
Joined: Mar 2008
Posts: 114
Likes: 0
Batteries good, no codes, using rotella 15w40,drained primary fuel and changed filters 2 oil changes ago. I do not have a fuel pressure gauge, found an oil pressure gauge at harbour freight will that work?
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
You may or may not have codes depending on your code reader. Check all the electrical connections between the FICM and the injector you replaced. If it's really missing it should show some kind of code or indicator why. You might also try individually disconnecting the injectors to find out which cylinder is missing.
Fleet Owner
Joined: Nov 2003
Posts: 27,885
Likes: 3,599
I don't think so.
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Senior User
Joined: Mar 2008
Posts: 114
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trying to understand these injectors. When we did balance test no. 3 was showing 20 percent low and no.2 at 10 percent , should i replace no.2 also?
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Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
bismic,
I have a theory that injectors that are factory (and not abused) wear pretty evenly.
If you buy my theory, if one is dying, the rest is not far behind.
Your thoughts?
Since I am on original injectors.. I am not a good candidate to answer this.
I have a theory that injectors that are factory (and not abused) wear pretty evenly.
If you buy my theory, if one is dying, the rest is not far behind.
Your thoughts?
Since I am on original injectors.. I am not a good candidate to answer this.
Fleet Owner
Joined: Nov 2003
Posts: 27,885
Likes: 3,599
Replacing all the injectors would be a tough call for me if I only had one or two bad injectors showing up - just because of the cost. If I had the cash and the engine had 150k miles on it or so - then maybe. I guess also if I were close to going for HP upgrades (requiring aftermarket injectors) I would probably choose that time to replace them all (rather than invest in several stock ones and then have to replace them soon afterwards for the HP upgrades).
I would love to know what others think!
Post Fiend
Joined: Oct 2009
Posts: 12,123
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From: N. Fort Worth, tx
reading a power balance is not always simple. depending on how many and what the real cause is you can issues from the cyclinder next to, behind or 180* out from the real concern.
replacing a failed injector can also have a drastic effect on fuel pressure as well.
replacing a failed injector can also have a drastic effect on fuel pressure as well.