Turbo BS Thread

If you can, pull up the O2 voltages and check them. IF they are off, the trims will never settle down. They are directly representative of what the O2 sensor is reading.

 

Your new injectors could have a different flow curve than stock. Double the flow at 100% duty cycle. Could be the same or less at the low duty cycles. That why you go off your fuel trims. Possible you could be adding fuel at idle.

FYI your fuel trims aren't just one block either. Once you tune idle, you get to tune slow cruising, faster cruising, moderate acceleration, and hard acceleration right before open loop.

 

ok, I didn't realize that STFT compensate for an out of whack LTFT, so I almost need to just follow the STFT like if its rich add more fuel since its going rich to fix the overall lean issue with the LTFT and vise versa. I thought that the LTFT were just like an average of what the STFT had been doing the last xx minutes

 

Stock tune + st + lt= fuel output

 

I feel like you've said this before.

 

Lol, never

 

Hard math is hard brah. Should get to work on it tomorrow night and with the newly found old knowledge, hopefully ill be in boost business by the weekend haha

 

Hey guys just picked up a 96 taco looking to make some power any recommendations? Parts, turbos, supercharger? Any good quality manufactures that you could recommend?

 

Welcome to the black hole! We all enjoy it in here, hope you will too!

Is it the 4cyl, or V6? Automatic, or manual? We need pics!!

I am personally working with LCEngineering and highly recommend their production parts!
URD has their own good reputation as well


LCEngineering.com

URDusa.com

 

I second that. ^^^

 

Vacuum leak at the injectors

 

Pro tip
Cover ur intake runners and u wont drop stuff down them as easily

 

Also it would be great if the truck would run like this so i didnt have to spend an hour hookin the plenun back up and takin it off if there is still a leak

 

So the orings on the urd injectors are well o rings, and the stock injectors had a big rubber collar; james said the new injectora just sit in there and the fuel rail hold em down to seal but obviously somethin didnt work right for me. Any cheat codes floatin around out there.

 

What Mr Crowntown said, LCE is good stuff!
Welcome!
I'd recommend a turbo
Once you get to know your vehicle (trans type, rear end gears, engine type etc...all good things to know ) we'll be able to help yah out better.
Basically a turbo build will include these things at a minimum
1) A turbo lol
2) Turbo manifold(s)
3) Wastegate with a low pressure spring (The older Tacomas seem to be good till 5 psi on a stock fuel system with no tune)
4) Filter for the turbo
5) Oil inlet and drain to oil pan
6) Piping from the turbo to the throttle body
7) Clamps for the pipes to the TB
8) Silicone couplers
9) various sizes of small vacuum hoses

And this stuff is optional but usually recommended

9) Intercooler
10) An aftermarket tuner of some kind
11) Boost controller
12) Upgraded Injectors
13) A 3" exhaust from the turbo back to the rear axle (a straight through muffler is recommended as it reduces back pressure and increases boost response)
*14) I personally recommend a scangauge as it helps monitor sensors for tuning

If you have a 5VZ-FE (3.4l V6) Then it is a good idea to dig down to the knock sensors and replace those with the beefier chevy counterpart as the stock ones tend to go bad under boost. The part number for those is SU1075 at any auto parts store, you'll need two.

Wells SU1075 Ignition Knock/Detonation Sensor

https://www.amazon.com/dp/B0026N8ZU6
And after you replace those you'll wanna replace your intake manifold gaskets as they are probably old

And this isn't required but a rear o2 sensor helps out with emissions were it matters Good luck man!

 

Does the bottom of the aftermarket injector match that of the original injectors, where it slides into the rubber insulator? Take pictures.

 

it does not slide into the rubber insulator. I don't have a pic but this is what the urd o ring looks like
and the stockers have a flat sided o ring kinda like this

 

If your aftermarket injectors look like the one on top, then you will always have some vacuum leaks.

I will ask, did you swap the lower o-ring off, for the squarish insulator?

 

no and gadget just emailed me back and said that I needed to do that... does anyone have like 6 of those spare isolators laying around?

 

You don't have the ones which were with the OEM injectors???