Fuel injectors

[kmchby76]

I recently found out that the 96-98 3.4L uses different fuel injectors than the 99-up 3.4L. My question is, can I use 6 fuel injectors from the 99-up 3.4L in my 96 3.4L?

[BruceTS]

wow didn't know they used different ones.... might give URD a shout, they'd know the answer....

[kmchby76]

Thanks Bruce, I just sent them an email. I will update as I hear from them.

[YotaFun]

wow didn't know they used different ones.... might give URD a shout, they'd know the answer....


Yup,
I confirmed this, at least look wise the one on my 97 look different then my dads 02.

Be interested to see what URD says,
supposedly the 99-02 are slightly bigger...

[mastacox]

The flow rates of the injectors are the same, the difference is that the older ones have a metal injector body, the newer ones have a plastic injector body. Not much difference, but given the choice between the two, I would want metal bodied injectors as I have heard the plastic ones are prone to damage (cracking, that sort of thing).

[kmchby76]

I am just curious if I am just having some bad luck on my end as the reason for my post is that in the last 2 years this will be my 4th failed fue injector. I wonder if the newer injectors are more reliable. If there is no flow rate difference I may try the newer fuel injectors.

[Seanz0rz]

hopefully they are cheaper too... stealer wanted 160 a piece when i asked last summer.

[2ndGen]

$134 after tax shipped quoted by Rafa@NTP last week for my 99

[kmchby76]

Well I heard back from Gadget at URD and as he put, in 99 Toyota switch from Denso to Aisin which is the reason for difference in appearance. I picked up a set of six from the local recycler Rancho Toyota Truck and SUV. I will be installing them late tonite after I get home from work. Thanks for all the input.

[kmchby76]

Great news so far, after 2 hours of labor I replaced all my injectors and she ran fine. I will do a little more driving later in the morning, but I am very optimistic. All 6 injectors Ohm'd out at about 14.4 each. They were a direct replacement no adjustment needed.

[kmchby76]

Well, wouldn't you know it, my excitement was a litte premature. As it turned out, I never thought to look at the o-rings before the install. As you may have guessed, I started her up this morning to take my son to school and She was peeing out that $4.46/gallaon right onto the driveway. So 8:30 this morning I was at it again. I swapped out the o-ringts with some good one from my old injectors and got her all back toegther again. And guess what, she again started peeing out that $4.46/gallon gas right back onto the driveway. Whe I took her apart again, I realized that when I was putting the injectors into the fuel rail, I was not doing it right, somehow I was messing up the o-rings. Well as the saying goes, 3rd times a charm. So far so good. I gave her a test run and she is keeping the gas in. And ti think I only spent 6 additional hours on fue injectors.

[MTL_4runner]

Well, wouldn't you know it, my excitement was a litte premature. As it turned out, I never thought to look at the o-rings before the install. As you may have guessed, I started her up this morning to take my son to school and She was peeing out that $4.46/gallaon right onto the driveway. So 8:30 this morning I was at it again. I swapped out the o-ringts with some good one from my old injectors and got her all back toegther again. And guess what, she again started peeing out that $4.46/gallon gas right back onto the driveway. Whe I took her apart again, I realized that when I was putting the injectors into the fuel rail, I was not doing it right, somehow I was messing up the o-rings. Well as the saying goes, 3rd times a charm. So far so good. I gave her a test run and she is keeping the gas in. And ti think I only spent 6 additional hours on fue injectors.


When you reassemble the injector rails, use vasoline to keep the o-rings from getting damaged.

[mastacox]

When you reassemble the injector rails, use vasoline to keep the o-rings from getting damaged.


Yup, in the URD Fuel Upgrade Kit installation instructions, they say to put fresh motor oil on the fuel injector gaskets before installation to prevent damage during reassembly.