I'm asking this here, because this forum seems to have the most knowledge when it comes to the AEM EMS.

I have an 05 S2K. My car used to be supercharged before I bought it. It was sold to me NA, but the previous owner left an AEM EMS running the car. He said it was tuned. A receipt I found in the secret compartment car says the model is a 30-1052. Today I decided to take off the panel and actually have a look at the thing, and it looks like this... (not mine, I borrowed the picture)



Any ideas on what that 10-951 number is in white on the face of the box? This is the 30-1052.

Also, my car cranks for a couple seconds before it actually starts up. I've read that this is a common issue with AEM EMS. Occasionally though, it will act like it doesn't want to start at all, which has me worried I'll get stranded somewhere. Is there a way to fix this so that it starts up more like a normal S2000?

And lastly, does this unit, whatever I have, disable the CEL function? I noticed that I had no CEL when I had the test pipe on the car (came with it) and I still have no CEL now that I put the stock AP2 exhaust and cat on there (which I expected).

Thanks

 

10-951.. probably some other code of some other meaning.. i had a 30-1012 and nowhere on it did it say 30-1012... if your Factory ECU harness' fit in the AEM its probably a 1052.. or possibly a 1012

the hesitant start up is ALL AEM EMS .. its a common problem and will always exist .. I believe even on the best tune it will still exist.. it kind of primes the engine and goes through a cycle before startup..

As far as disabling your CEL.. im not 100% but im going to say no it doesnt.. The only UN-Factory thing it does is disable the engine temperature gauge located in ur gauge cluster to always read 1 bar... Which can be corrected with either an external gauge or Modifry ECT

 

[QUOTE=JohnnyP912,Nov 18 2009, 11:35 PM] 10-951.. probably some other code of some other meaning.. i had a 30-1012 and nowhere on it did it say 30-1012...

 

I hated the hesitant start.. Sold the unit.. The Hondata K-Pro is a little more expensive but gives you the quick stock s2000 startup..

And if you have the aem in there tuned for a supercharger which isnt there anymore .. i would either retune it.. or since ur NA possibly pick up a stock ecu for 100 bucks.. and enjoy a more reliable setup

 

the slow startup could be a number of things. you'd need to get it a GOOD tuner to figure out the issue. If the car does not sync right away then there may be some changes to a couple of resistors that need to be made.

I started with a 1050 instead of a 1052, but as soon as i put the higher value resistors in the car started up just like stock. almost as soon as you hit the button.

 

Are you talking about actual resisters in the AEM box, or resisters replaced on the wiring of the car?

I had my car always starting in 2 cranks. First time around to Stat sync the crank and cam sensor, then it would start right up. That is the fastest I could get......still not stock but not perfect.


Help me understand the resisters your talking about.

J. R.

 

inside the ems.. i dont have my notes here so i cant say exactly which ones, but in my 1050 they were 1k ohm, i swapped em out for 5.5k i believe. there were 2, they are the pull ups for the cam and crank signals

 

its all in the tune and tweaking.......

mine starting after some tweaking.


http://h22civic.com/videos/HDRacing/AEMCOLDSTART.wmv


i am not sure how much faster you want it to start then that

 

i there is some variance in the cam/crank sensors which is why some cars start faster than others.

 

what do you change it to? the base maps already have it set to high sensitivity below 500rpms.