So, long story short, new owner of a 2003 evo 8 on aem v2. Having an issue with cold starts--30-40 degrees takes 7-10 tries and then dies after 25 seconds of running. Once I get it moving, its fine. Any help would be appreciated! I do have the cal file for anyone that can help!

Mods done to the car
2.3 stroker
2150's
dual pumps with a -8 line
rs2 stroker cams

 

Anyone? Bueller?

 

I'm having the same issue. Can you post a screen shot of your START tables?

This is the only thing I found that could help so far.

 

I would try adding fuel. So increase ipw cranking

 

You also posted this in the Evo X section which might bypass quite a few people with Evo 8/9's with AEM v2 from even seeing the post.

You probably do want to start adding fuel to the IPW Cranking tables to help the starts. You know you went too far if you have to hold the throttle down to get it to start. Typically when the engine is warm larger injectors might dump too much fuel in which is why at higher coolant temps you end up having to hold down the throttle to get more air into the chambers to get it to start until the tables are adjusted perfectly.

Another thing to check is to verify what your LTFT's are settling at, not sure how the AEM v2 handles it but assuming that it's similar to the stock ECU having the values within a few percent of zero fuel trims generally makes the car start and drive better. You can also set your target idle RPM a bit higher which should help keep the car running without it dying as RPM's drop down as it warms up.

 

Also in general e85 has harder starts in the winter, I normally switch back to pump gas when it gets cold

 

You have to ad fuel because e85 has such a low gasoline %

 

This is indeed typically true for cold starts.

Indeed, I only run E85 during the warmest 6 months of the year, November I run 93 octane and add stabil to the tank before storing the car from December til end of March. Then in April I usually continue to run 93 octane before switching to E85 and I only go over to 93 octane for racing events that require it for classing reasons from May-October. I've read too many horror stories about E85 gumming up fuel systems during storage periods or cold starts around freezing temps, plus flex fuel is so much easier than messing with different tunes depending on E content manually.