I am pretty good with the ECU Flash stuff, including turning off codes for inspection, working with the XML, etc... The one thing I am having trouble with is finding a step-by-step guide to setting up speed density. Such as:

• what sensors you need
• what wires you cut
• what settings you change in the rom
• anything else that I am missing

I have searched through a lot of the Tephra v7 thread, as well as played around with it on my car, and had no luck. Can someone point me in the right direction, not for tuning, but just for starting from scratch, and getting the car to run speed density?

Thanks guys!

--mark

 

I think it's all in mrfred's thread where you download the roms from. I think the title is something like 'links to jcsbanks speed density patches'.

 

Here is that thread you are referring too:

https://www.evolutionm.net/forums/ec...y-patches.html

I will read through it and hopefully get what I need!

--mark

 

Try this one as well...
https://www.evolutionm.net/forums/ec...ched-roms.html

 

So on my car, I am running AEM, so I have the GM IAT wired in already, as well as the 3.5 bar AEM map sensor and an AEM UEGO wideband. Since all of this is wired into my plug and play AEM, shouldn't I be able to swap in the stock pcm, perform the software tweaks, and fire it right up pretty much no problem, without re-wiring anything?

Normally you would have to wire up the IAT, larger MAP, and the wideband, but since mine already is there for the AEM, wouldn't it be the same setup?

If so, I am a lot closer than I thought!

--mark

 

I don't have an AEM so I don't know, but how are your sensors wired into the AEM? If they are wired into the same pins that the stock ECU needs, then no, you don't need to rewire anything. If the sensors are simply wired directly into some kind of inputs in the AEM, then yes, you do need to rewire.

For example, your GM IAT sensor needs to be wired into either the maf iat pin or the fuel temp pin. You set which one in the SD settings. Your map sensor gets wired into the mdp pin.

 

My IAT is wired to the stock harness, I beleive through the IAT pin, and the 5 bar AEM Map is wired to the stock map wires. Then the UEGO wideband is wired to the front O2 sensor wire right before the AEM, so it should all plug and play. Maybe today I'll try to fire it up SD.

 

heey neonglh did this ever workout for you? Im contemplating doing the same thing