thanks pito, that makes sense.. i'll try it later.. and yeah i know that i need to cut off the part that goes to the oem AIT in the maf, its just like that coz i have to rewire it coz i cant get the new sensor to work yet.. haha

 

aight i hooked it up, tried the red wire and it still reads low.. but that on the scan gauge.. so i grounded it on the block and still it reads low.. then i hooked up my laptop and it reads 33-35C, i guess now its working haha scan gauge reading doesnt work I guess

 

Scan gauge will read the temperature the stock ECU sees. I don't even think the Air temperature sensor is still connected to the stock ecu, and if it does, it will not be correct since the IAT resistance characteristics are different to the stock one on the MAF!

Pito

 

^^ well the hydra is supposed to use the stock AIT on the maf unless you have the new AIT sensor... but you could be right on the different resistance characteristics between and stock AIT and the one from hydra. before when i was using emanage i get the right AIT reading on scangauge, after the hydra installed it reads too low (using scangauge).. something on ems harness might have cause change in values going to the OBD port but as long as the right temp reading is going through the box it shouldnt be a problem

 

I don't think the IAT on the stock MAF can be connected to both ECU's at the same time. So did you checked the Air temp on the Scangauge with the stock MAF and stock IAT sensors after installing the Hydra. Did it read something? If it was reading something: was it a real temperature or was it a fixed number?
You probably need to tell the Hydra (some correction table) that you changed the IAT to one other than stock so that it can read an accurate temperature! It reading something does not mean it's a correct temperature reading!

That is speculation from my part as I have no experience with the Hydra but it is pretty much the same with all Stand-alones!

Pito

 

yup the stock maf reads AIT after installing hydra, its not a fixed number.. it goes up and down.. the scangauge reading became inaccurate though, it always reads very low.. on the hydra software it reads too not sure how I cant remember how accurate using the stock AIT but ill try to rewire it later if it reads fine so i can sell my maf lol

 

I don't remember if I asked this... Whats the 2step/ALS for?
And how will the harness benefit 2step/als and WOT??????

Just wondering, lol. N00b explanantion plz ^^

 

dan can explain it better...

 

Do you guys know if the VVTi tune on the hydra is the same tune we have on our stock tc? or did hydra use stock vvti tune as preset? if not then its something we all need to consider when having tuned lol

 

What your thinking had crossed my mind too.

I believe it may just be the oem vvti tune thats on the hydra.

But I may be mistaken.

I'll call them up later today and ask them.

I have some errands to run ^^

 

Does anyone still have the MAF hooked up when using the Hydra?

Can we weld/mount the MAF sensor on the pressurized intake pipe before the TB without damaging it? Or will boost kill it?

Right now mines connected but just hanging there in the engine bay...will the hydra or stock ECU still read it during "day to day driving"?

Does it read the 02 sensor too?

J~

 

Not sure about the Hydra since its made for the tC but the AEM when the tuner was adjusting the VVTI I picked up a lot across the entire power band except peak. The average gain was 5-8hp at the wheels.

 

the maf sensor is not used in the hydra but you will have it connected to read air intake temp.. Mounting it on the pressurized charge pipe im sure will be fine, ptuning and some other few have done that and hasnt report any problem they even ran it on medium boost. And yeah it uses O2 sensor too for closed loop, or you can buy the hydra O2 sensor which is better than stock

 

x2

 

Ok so I just got my hydra wideband L2H2, i wired it to the harness exactly as the instructions that came with it.. then i started the calibration.. on the second part of the calibration, i then connected the hydra O2 sensor to the harness, then after I did that the car dies.. I started it and it doesnt even hold idle, i have to keep on pressing the throttle for the engine to stay on.. when i unplug the hydra wideband O2, then everything is fine.. I tried this using both the stock O2 sensor setting and the hyda wideband setting under the closed loop tab but no luck..

sum it up..
1. The car dies when i plug the O2 sensor to the harness
2. I cant complete calibration coz the car dies, on the realtime feedback window it stay 14.7.. not the open air calibration values like 20.7-20.8

anybody can help me with this? any link on wiring the WB 02 so i can see if its the same to the one I have?

 

I would go through the wiring again as I suspect something is up there. By the way you calibrate with engine off and Hydra on so you may want to go through the directions again.

 

x2

Your not supposed to turn on the car (don't crank the engine, just leave the key in the igntion so hydra is getting power).

Once all the calibration is done, don't forget to save, and download to the ecu ^^

 

Im pretty sure i wired my sensor according to the pinouts guide that came with the wideband as i checked everything more than 3 times before i connected it.. so i dont crank it? the instruction says ignition on so i did the first part with the engine on and it seemed to work fine.. i'll try to check the pins again maybe theres a problem with the contact

 

ignition on, so there is power to the hydra ^^

I guess the wording is wrong, lol.

Just leave the key in the position so all the accessories get power.

Also, what is the left/right sensor source, you have it to in the closed loop settings???

 

in otherwords, the auto repair term of " Key On Engine Off "