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Old 08-02-2009, 11:59 AM #1
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Removing Fuel Injectors on 4.0 v6

Does anyone have a shop manual that outlines the procedure for this and could give me the quick run down.

I'm still trying to isolate the cause of my high Long Term Fuel Trim values on the drivers side which is potentially causing a miss on cyl #6. It was suggested I move the #6 injector to the other side of the motor and see if the problem follows. The thinking is that it's a bad injector or even a bad o-ring on it.
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Old 08-02-2009, 01:14 PM #2
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Quote:
Originally Posted by snowjay View Post
Does anyone have a shop manual that outlines the procedure for this and could give me the quick run down.

I'm still trying to isolate the cause of my high Long Term Fuel Trim values on the drivers side which is potentially causing a miss on cyl #6. It was suggested I move the #6 injector to the other side of the motor and see if the problem follows. The thinking is that it's a bad injector or even a bad o-ring on it.
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Old 08-02-2009, 01:27 PM #3
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Thank you!

Unfortunately that's what I was afraid of, having to take the top of the intake manifold off (I guess they all it the intake air surge tank). Not like my Dodge where it's just 3 bolts and you pull the whole fuel rail off.

Time to trade it in!
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Old 10-30-2016, 05:51 PM #4
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Fuel Injector

Anyone replace a fuel injector on a 4.0? Working on a 05 4runner, #4 cylinder. Thanks.
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Old 01-23-2018, 05:06 PM #5
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I'm having the same issue on my 04.
Keeps fouling the same plug.
Now time to find someone in the Long Beach area that can change a fuel injector.
I've changed the plug and boot with everything else looking absolutely normal.
UGH!
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Old 07-19-2019, 11:32 PM #6
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Quote:
Originally Posted by fishin View Post
Anyone replace a fuel injector on a 4.0? Working on a 05 4runner, #4 cylinder. Thanks.
same here LTFT b2 is 37%, now am getting a cyl 4 misfire, changed plugs, no dice. looking to change out the injector, trawled the forum, no videos on the process
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Old 07-21-2019, 04:44 PM #7
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Originally Posted by earthrealm View Post
same here LTFT b2 is 37%, now am getting a cyl 4 misfire, changed plugs, no dice. looking to change out the injector, trawled the forum, no videos on the process
Mine end being the head gasket. I never did change the injector.
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Old 07-21-2019, 06:32 PM #8
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Mine end being the head gasket. I never did change the injector.
wow, thats scary, what other symptoms did you have?, how was it diagnosed?, i thought HG issues on the v6 was identified by cylinder 6 misfire.
i swapped coils from cyl4 and cyl 2, lemme see if the misfire will follow,
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Old 07-21-2019, 07:12 PM #9
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Quote:
Originally Posted by earthrealm View Post
wow, thats scary, what other symptoms did you have?, how was it diagnosed?, i thought HG issues on the v6 was identified by cylinder 6 misfire.
i swapped coils from cyl4 and cyl 2, lemme see if the misfire will follow,
I swapped coils too. No luck. It was aft driver's side, aft cyl. I forget what it's called, but you test your anti- freeze for exhaust fumes. That's how I found out. GL.
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Old 09-04-2019, 03:25 PM #10
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Super stoked on this forum. It definitely helped me and saved a ton.

'04 limited v6 4x4 177k

heavy idle, check engine, cyl #3 misfire.

checked compression also- about 125 PSI everywhere. The highest within the correct % of the lowest.

Replaced plugs. nada.
new (no refurb) ignition coil on #3. Seemed to be better for about a week (200 Miles) then threw same code with heavy idle.

dove all the way down into the fuel injector, swapped #3 with a brand new one. Its been a few weeks now, and I get a heavy idle once in a while, but no code, and the engine sounds way better.

I also cleaned the throttle body and MAF while I was in there. YT videos said it would heavy idle for some time while the computer adjusts to the new airflow.

If you are remotely handy and have a socket set (including a socket drover with allen key heads - weird but there are 3 bolts somewhere in there that require an allen key - and a typical one won't fit easily.) this job is a breeze.
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Old 09-04-2019, 04:44 PM #11
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@SnowyPeaks543 thanks for the heads up.
did you by any chance check the fuel trims before and after the injector swap?
was there a video or step by step pictures of the injector removal process?, am a bit handy with tools&meduim wrenching, so i believe i can handle the ops
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Old 09-04-2019, 05:06 PM #12
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Quote:
Originally Posted by earthrealm View Post
@SnowyPeaks543 thanks for the heads up.
did you by any chance check the fuel trims before and after the injector swap?
was there a video or step by step pictures of the injector removal process?, am a bit handy with tools&meduim wrenching, so i believe i can handle the ops
I honestly don’t even know what you're referring to-so no.

There are some on YouTube that help- but I used the Hayes manual and it was simple. If you’re handy at all then it’s easy. It was the first time that I actually wrote down every single thing I did step by step- bolt for bolt- and obviously just followed my paper back for install. First time i didn’t have any extra bolts! Haha

Watch your pointer finger on your left hand when removing the engine mount bolt on driver side. It’s tight and the thing you bang into is sharp. Heads up haha.
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Old 09-04-2019, 09:36 PM #13
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Originally Posted by earthrealm View Post
wow, thats scary, what other symptoms did you have?, how was it diagnosed?, i thought HG issues on the v6 was identified by cylinder 6 misfire.
i swapped coils from cyl4 and cyl 2, lemme see if the misfire will follow,
That’s smart! Coil is a lot easier to change!
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Old 03-07-2020, 02:10 PM #14
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Cylinder 4 misfire

Quote:
Originally Posted by SnowyPeaks543 View Post
I honestly don’t even know what you're referring to-so no.

There are some on YouTube that help- but I used the Hayes manual and it was simple. If you’re handy at all then it’s easy. It was the first time that I actually wrote down every single thing I did step by step- bolt for bolt- and obviously just followed my paper back for install. First time i didn’t have any extra bolts! Haha

Watch your pointer finger on your left hand when removing the engine mount bolt on driver side. It’s tight and the thing you bang into is sharp. Heads up haha.
I have a 2008 V6. In my Haynes manual there's a note on page 4-12 that says (on V6 models the injectors aren't accessible) below illustration 11.7. I have a misfire on 4, and I've tried replacing the plug and coil. Fuel injector was next. Is it possible to do this myself or is a repair shop the only option?
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Old 03-10-2020, 07:10 AM #15
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Quote:
Originally Posted by Coastal4runner View Post
I have a 2008 V6. In my Haynes manual there's a note on page 4-12 that says (on V6 models the injectors aren't accessible) below illustration 11.7. I have a misfire on 4, and I've tried replacing the plug and coil. Fuel injector was next. Is it possible to do this myself or is a repair shop the only option?
its an easy job, 5/10, or 4/10. was a lil scared initially, but its an easy ops. remove the top air box.there is hex bolt under there, think 12mm or so, confirm and keep that handy
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