Hopeless Diamond
New member
Yeah, watched mine because of this thread. ~-13 at idle and LT pretty much 0 at cruising speed, ST bounces around by 1 or 2 % as expected
High negative LTFT - fuel injectors? = SOLVED!
- Thread starter Spiker Engineering
- Start date
Spiker Engineering
official vendor
Mine is pegged at -18%. I might have been OK with it if it weren't for two things: 1. it was right at 0% before the fuel injector change, and 2. fuel in the TB.
19963.4lsr5
New member
Plugging the idle air assist didn’t solve it I’m guessing.
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Spiker Engineering
official vendor
I forgot to report back on that! I disconnected the hose, plugged the hose and capped the IAC valve tube, and drove around.
My LTFT didn't change (even after resetting the ECU). But the fuel in the TB was gone.
gamefreakgc
Elite Member
Have you noticed any difference in mileage with the new injectors? Or is the 4Runner garaged for now?
Spiker Engineering
official vendor
I really haven't driven it enough to check mileage. My ultragauge was indicating about 14.5 mpg during the limited test drives, which is almost exactly what I had before.
Spiker Engineering
official vendor
My cleaned OEM injectors came back from MotorWest Performance:
Back in they went:
And lo and behold, the LTFT is back to normal:
Here is a side by side between OEM (left) and Osidetiger (right) injectors. All data is basically the same, except for the LTFT.
So everything is right with the world again, yay. I will check for fuel in the TB after some driving, but I am guessing there won't be any.
Just for kicks, I brought this up to Charlie at Osidetiger. Not surprisingly, he just told me that they sold many of these and never had a problem. I'm guessing most of his customers don't check LTFT or look for fuel in the TB
. Again, I'm not surprised that he won't take these back (even though they have 50 miles on them), but I find his lack of curiosity or interest in feedback on his product quite disappointing.
Oh well, we can put a bow on this and move on to other things.
Back in they went:
And lo and behold, the LTFT is back to normal:
Here is a side by side between OEM (left) and Osidetiger (right) injectors. All data is basically the same, except for the LTFT.
So everything is right with the world again, yay. I will check for fuel in the TB after some driving, but I am guessing there won't be any.
Just for kicks, I brought this up to Charlie at Osidetiger. Not surprisingly, he just told me that they sold many of these and never had a problem. I'm guessing most of his customers don't check LTFT or look for fuel in the TB
. Again, I'm not surprised that he won't take these back (even though they have 50 miles on them), but I find his lack of curiosity or interest in feedback on his product quite disappointing.Oh well, we can put a bow on this and move on to other things.
gamefreakgc
Elite Member
That's a bummer, they had real promise. Was really rooting for you that they would work out.
Spiker Engineering
official vendor
You and me both, that's $300 down the drain, let alone all the time and aggravation of figuring out the issue and doing the job twice.
In the end, I'm happy having my OEM injectors back in, it just looks and fells right - and the LTFT numbers don't lie.
In the end, I'm happy having my OEM injectors back in, it just looks and fells right - and the LTFT numbers don't lie.
19963.4lsr5
New member
If he had an overdriven supercharger it probably would have been ok
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brillo_76
Elite Member
Minor. Just shows us that engineering on the injectors of OEM is as close to perfect as one can get. [ granted clean and fully functional] This really doesn't surprise me. Bummer on loss of $300 though. You also proved once again that it's best to stick with oem parts.
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brillo_76
Elite Member
Now, that is a valid point.
more fuel more air... Sent from my SM-A536V using Tapatalk
19963.4lsr5
New member
It’s pulling fuel trims to get back to optimum 14.7AF because of the higher flowing injectors.
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