i have a 05 colorado with a i5 and i put a m90 roots blower on it. i would like to run e85 but in texas its not exactly readly avalible so i want to "trick" it with possibly putting a known resistor value in place of either the iat or coolant temp sensor to add roughly 30 percent fuel and some timing when the computer sees that its sub zero outside. so i have a e85 switch so to speak, pump gas=normal temp, e-85 = resistor temp


Sound doable?

 

Terrible idea. Just get your truck tuned how you want it the proper way.

 

i guess the best way do this is to have the laptop with me if there is a chance i have to run 93 just reflash huh?

just trying to come up with a half way clever way of being able to switch fast

 

There is and e85 table in your PCM's OS. All the tuner should have to do is make sure you are properly tuned for the 93 and the e85. Once the PCM detects the e85 it will use that table.

 

are you sure i know mines not but i dont think any of the colorados were designed for it

i dont remember seeing an e85 table either. high octane yes but no e85

 

I don't think it is as simple as that. First he needs to find out if his year model uses a fuel composition sensor... The newer style trucks, on fullsize i believe it is 2006+ uses an algorithm to determine the alcohol content....

 

https://www.performancetrucks.net/fo...light=dual+pcm

 

Just bumped it up to the top for some updates. That sounds really cool, I like the idea of having an economy tune, that would help the pocket book.

 

just wanted to know who can tune i5 colorados???

 

Contact Wheatley, he is in Houston and Im sure he can hook you up with a good tune.