Removing Fuel Injectors on 4.0 v6

[snowjay]

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.

 

[drmorbius]

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.

 

[snowjay]

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!

 

[fishin]

Fuel Injector

Anyone replace a fuel injector on a 4.0? Working on a 05 4runner, #4 cylinder. Thanks.

 

[810moto]

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!

 

[earthrealm]

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

 

[fishin]

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.

 

[earthrealm]

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,

 

[fishin]

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.

 

[SnowyPeaks543]

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.

 

[earthrealm]

[MENTION=138795]SnowyPeaks543[/MENTION] 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

 

[SnowyPeaks543]

[MENTION=138795]SnowyPeaks543[/MENTION] 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.

 

[mdusek1576]

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!

 

[Coastal4runner]

Cylinder 4 misfire

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?

 

[earthrealm]

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

 

[Drcoffee]

When you remove the intake, lay a clen towel over the 6 ports. You dont want to drop anything down there.

This is a good thread. Please post back with your results so far.

 

[jmwalshy39]

Fuel Injectors Replaced - Now Cylinder 1/5 >30% loss through Intake

All, looking for Support here , had fuel injectors changed on my 2013 4Runnner recently, Vehicle had 100,000km on the engine, my ECP just expired. After the fuel injectors had been changed , the dealer ran some additional tests and came back with the following.
SCANNED FOR CODES, FOUND CODE P219A – BANK # 1 A/F IMBALANCE.



PERFORMED COMPRESSION TEST, FOUND

BANK # 1:

CYLINDER # 1 – 164 PSI

CYLINDER # 3 – 178 PSI

CYLINDER # 5 – 165 PSI



BANK # 2

CYLINDER # 2 – 170 PSI

CYLINDER # 4 – 185 PSI

CYLINDER # 6 – 180 PSI



PERFORMED CYLINDER LEAK DOWN TEST ON BANK # 1, FOUND

CYLINDER # 1 – 33% LOSS THROUGH INTAKE

CYLINDER # 3 – 10% LOSS (WITHIN TOYOTA SPEC)

CYLINDER # 5 – 35% LOSS THROUGH INTAKE



ALL CYLINDERS IN BANK # 2 – 10% LOSS (WITHIN TOYOTA SPEC)



They then proceeded to tell me it was a 7700 dollar repair plus tax. Wanted to hear from the group sustained operation at the current loss rate through the intake and potential repair options?

 

[Lookitsranday]

i think i have a leaky injector as well. haven't don't pressure test or anything yet. i cant visually see any leak, i do smell unburnt fuel, can't determine if its from the engine bay yet. i do smell it at idle in the garage coming from the exhaust. my LTFT bank 2 idle are 3.9. as RPM increases LTFT increases. at about 2000rpm LTFT is close to about 14%. at 3000rpm it's close to 18%. but drops down to 3.9 at idle.

events leading to this;
bought car used from private party. was okay until about a month in. Misfire on cyl#6 i believe. decided to change all my plugs and both post cat o2 sensors (had replaced them with cheap aftermarket) as well. drives fine idles fine. no vacuum leak or anything. a few trips later, the p0430 code pops up, thought it was due to the post cat o2 sensor. This was replaced with denso oem both sides to make sure. 20 miles later p0430 comes up. i've been research plenty and i think your post is close to what i got going on. I feel i may have a leaky injector. would like to fix underlying issues before considering changing the bank 2 cat.

going to have fuel pressure test very soon. any help to pin point the cause would be appreciated before i tear down into the fuel injectors.