So I installed the AEM V2 Standalone Ems about a week ago and got it tuned.. Now my car turns over 3-4 times befor firing up. And some times it just turns over and no fire up what so ever. My 1 s2k buddie said my Crank Postion Sensor could be going bad... And idea's what it could be... Befor I had aem v2 and car tuned/dyno car would run/ start up fine...any help would help me out... Bc I'm trouble shooting. Thanks for reading

 

I read that turning the car key all the way (like 3-5 seconds?) and let the fuel pump prime then press the start button helps.

 

agreed with above, while i was running the series 2 and everyone i know with ap1's running series 1s have the same issue it takes a few seconds to crank over.

 

http://static.photobucket.com/player...822_063530.mp4

Here is my cold start with a ems series 2. Took video this morning at 645am...car sat overnight. it will never be as good as stock, but it's all in the tune.

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Thats one of the best starts with AEM Ive seen since Ive been looking. Who tuned yours?

 

[media]http://www.youtube.com/embed/mTsozIkHW4U[/media]

I tuned it myself. That's the best way to deal with cold start. There's no science to it, pretty much trial and error and u get 1 or 2 chances per day.

The logs are only good for objectively measuring if the settings positively or negatively impacted starting performance. Because you need to know the time from stat sync to stat cranking off and the starting coolant temp for comparison.

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Sounds like the tune. Try adding more cranking fuel.

 

10,000us cranking fuel is approximately the sweet spot for a ap2 with stock injectors and fuel pressure. Around 6k is default...

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