Did you take some wire from the harness that you removed and add it to the Denso harness, or add some wire from another source?

 

No, just used fresh wire, 18ga.

 

No change, problem still exists, exactly the same.

 

Well this is a challenging situation. I really expected the sensors to make a difference. It’s also not easy to go back to the stock tune for you with your mods, which would sadly be my next consideration in the process of elimination. That or a leak down test. My biggest deficiency is diagnosis though.

 

Shouldn't be too bad. I can swap the stock injectors back in about 30 minutes then load the stock tune. That should be good enough for driving around in vacuum. I've been trying to get revised tunes from RR for the good part of the year with no luck so at least this way I can rule the tune out of the equation.

 

It’s a good idea. You will need the stock MAF. Idk if the supercharger uses it. I’m sure you checked for silly stuff like boost leaks, etc.

Trying to eliminate the entire SC and tune as a variable will be helpful. At this point, it’s a process of elimination, unfortunately.

Im glad you have lift access at least. That helps sooth the pain.

 

Yeah it still uses the stock maf down near the passenger fog light where the air filter is

 

Forgot about the larger diameter MAF pipe. Need to source a 76mm MAF tube and rig something up. Those are weeks out from China, so I stuck the airbox back on. Will get the car on jackstands and drive the thing in the air tomorrow.

 

do you have access to a 3d printer? I have a STL file for a MAF housing

 

Here goes nothing!








Don't want to jinx it and get ahead of myself before the "second day startup", but trims are much better and I'm not getting anywhere near the knock feedback as before. Now at least the car is adding in 10% fuel or so vs. trying to take out 20-25% too much fuel.

 

I was just reading around on this. So at one time I was told by a few that you can't just always depend on splicing like this to work the wire correctly for the sensor signal, because it so sensitive to the wiring carry milliamps/votls, in +/- and just a little off if codes. I remember researching this so years ago and seeing some test where depending on the wire type, gauge, length and other, that it might work. But then it might not work due to the sensitivity. IDK? But I just thought I would mention it.

 

Well I trust this more than I trust those O2 extension harnesses. There's no other option aside from running aftermarket NGK/NTK sensors which have longer harnesses. So pick your poison

 

Also, if I understood correctly, you can buy a salvage yard ECU and have the keys programed thru software to get the Stock tune back.

 

Any updates?