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Old 03-02-2011, 01:56 PM
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Going to service the Fuel Injectors....

Guys, I am going to take some time and service my fuel injectors on my 2004 Wrangler (6 cylinder w/68,000 miles). I bought some new "o" rings for the injectors and I have already run some injector cleaner through the gas tank a couple of times. I am doing this as part of my routine maintenance since I bought the Jeep last summer. I have a feeling this jeep sat in a garage for a long period of time without running. I have gone through and serviced the diffs, transfer case and tranny. I've flushed the cooling system and changed the thermostat and added a Hi-Flo Thermostat housing from Hesco. I've service the front breaks and bled the lines, replacing the old brake fluid with new. I am now working on the fuel system, inspecting and checing it out as I go. The Jeep is running fine and I don't have any troubles at this time.

Do you guys have any advice or pointers on things I should look for or watch out for as I remove, inspect and clean the injectors? I've never serviced fuel injectors.

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Old 03-02-2011, 04:20 PM   #2

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I have 153,+++ miles and never touched one. I don't think I've even seen anything in the forum about servicing them. Who knew?

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Old 03-02-2011, 04:24 PM   #3
Knows a couple things...

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Personally, I don't think they need servicing. All modern domestic gasolines have more than enough fuel injector cleaning additives to keep the injectors sparkling clean. Technicians will confirm that dirty injectors are pretty much a thing of the past. Really.
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Old 03-02-2011, 04:56 PM   #4
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Unless the seal is already leaking, best to leave them alone.
Re-doing them often creates more leaks. It's tricky to get the rail back on equally.

But if you really have to, go find a shop that specializes in rebuilding injectors. They can test yours for spray pattern and volume. They can even provide you with a matched set.

What you will gain from all that MIGHT BE 1/10 of a HP on a Jeep from getting matched injectors.

If it's not broken, "fix it" till it is.
It's no wonder the country is falling apart - stupidity abounds!
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Old 03-03-2011, 05:34 AM
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Thanks guys. I believe the injectors are okay, but, I wanted to check them out and in doing so, replace the o-rings while I am at it. I like knowing what state my Jeeps different systems are in since I am not the 1st owner and have no idea what preventative maintenance the previoius owner did or did not do.
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