Tacoma running lean with TRD cold air intake fix

VId I made for people having issues with the 2nd gen CAI and running lean

http://www.youtube.com/watch?v=TfMpeTdseMU

 

Excellent information!

 

Question: Does this modification only apply if you have the s/c, or is this for N/A engines as well?

 

To my knowledge it applies mainly for the Cold air intake. but its always good to look at the whole picture.

 

Hey Otto,

After cutting part of the tube out have you gotten a lean code yet? Or has it been stable so far? I've been wanting to get the trd cai but with problems of it running lean, been hesitating getting the cai.

 

Its running fantastic. I've put it through the paces as well over the 4th. Everything is great.

I don't know if you'll need a reflash if you put in just a cai. but it is working great for me now.

Good luck!

 

Awesome info!! Like others said been hesitant on getting the TRD CAI because of the lean issues. This helps me want to get it now, my s/c I know wants it ; )

 

Interesting.....

 

yea but hes got a super charger, he probly had to get bigger fuel injectors, which dumps more gas, more gas means u need more air, so if the thing was blocking whatever he was explaining, it would caused it to be more lean, Air and Gas ratios is very important as how u tune them, lean is more gas than air, rich is more air than gas, u need to have a certain amount of both to hav the best combustion possible.


but i dont get why a N/A would be lean with a Intake.

i maybe be wrong tho

 

Lean means to much air, Rich means to much fuel. Both N/A and F/I need to have a good A/F ratio in order to have the most performance.

 

I did mention my build. there are bigger points that come with the super charger as lucaro mentioned. The plastic piece was starving the engine of air.
After cutting it off and letting the cai do its thing. everything came out peachy.

 

Do you have a way to monitor your afr's? I'd be interested to see how it differentiates from the 1st gen TRD.

 

I dont have a way to monitor my afr, atm

 

Some people will buy it at the dealer without knowing much if anything about it. If they then find TW at least there are a couple of fixes for it.

 

It was just done as toyota intended, there is a groove that runs the circumference of the tube to cut.

It doesn't of course mean that drilling holes isn't a bad idea, but it is a little more work as you need to take the time to align it and bore it out to the right size. The other thing is i would not know how much shift there would be through out time. Holes = exact position.

Cut off lets things shift with no diminishing flow.

Just some thoughts.

 

Oh and woot! my first sticky haha

 

I have the piece that was cut off, it does not reach over to the other side of end of the connecting end, which means it adds no value to being held securely.

The tube in question sits snug in the connecting rubber piece, but is not a major factor in securing things together.

The fasteners are on the ends of the connecting rubber tube with a little lip to keep it secure. So the part cut off again adds no value to it being secure.

Sorry if this isn't very clear. I can post some pics later and clarify.

 

Awesome fix. I wanted to dump my K&N (which sucks in air on average 20F hotter than ambient air) for a TRD that sucks the air from the wheel well as it should.

 

Sorry but you say that removing this piece is not starving the engine in air anymore. You've done that cause it was lean. So doing that you let enter more air that is not measure by the MAF sensor and you think the mixture is richer! Sorry but you have lean the mixture.

I can't comment precisely on the SC V6 cause i don't what are the change done on closed and opened loop by the reflash of the ECU.

But for the NA engine, in closed loop, the motor can't go lean. It's still possible in open loop (WOT) in case you have changed the aspiration system and then the shape of the funnel where is install the MAF sensor is so different than the STOCK OEM it affect the way the ECU's calculating the amount of air. And it's not the case with the TRD CAI.

To change the AFR on a NA engine you'll need to install a MAF calibrator to change the AFR ratio in opened loop and only in opened loop. In closed loop it will change nothing cause ECU is working against you to keep AFR close to 14.7.

If you wanna change the AFR in closed loop you'll need a much more expensive electronic device like MAP ECU or APR x1.