EMS Starting And Tuning Help Please

[i3igpete]

ok, then just use that one as a starting point. If you're AFR's aren't too bad, next is idle tuning. Use the how-to here (you will need to register):

Wisconsin Street Scene • View topic - AEM EMS Idle tuning •

[DanEboy5]

Hey Pete, one of the things I noticed when helping Mike is, while he is cranking I have to mulipulate the TB a lil. I finally got the car to idle around 1100rpm's. I could drop it a lil but it seemed to stumble too much. It does have a slight miss and I believe I need to check the timing. He had Jim up in WI install the 3sx cam gears and I hope I don't run into too much issues with the timing.

-Dan

[jspecmike]

ok, then just use that one as a starting point. If you're AFR's aren't too bad, next is idle tuning. Use the how-to here (you will need to register):

Wisconsin Street Scene • View topic - AEM EMS Idle tuning •

Hey Pete, one of the things I noticed when helping Mike is, while he is cranking I have to mulipulate the TB a lil. I finally got the car to idle around 1100rpm's. I could drop it a lil but it seemed to stumble too much. It does have a slight miss and I believe I need to check the timing. He had Jim up in WI install the 3sx cam gears and I hope I don't run into too much issues with the timing.

-Dan

I went to crank it over again tonight and of course it wouldnt want to start.

[jspecmike]

I went to crank it over again tonight and of course it would want to start.

Car now starts, it seems to have a mind of its on. I joined the forum and have been reading through it, I got the car to idle at 850rpm and it is sounded healthy lol.

[i3igpete]

i had a similar problem where the car wouldn't start unless i just barely cracked the throttle when starting. if you know you have good fuel pressure, open the TB screw a few turns. you will need to retune the Idle% vs. target table, of course.

After it starts, does the idle wander or does it stay pretty consistent? How are AFR's? do you need to keep the throttle cracked or can you let your foot off? Post your latest working CAL file in a ZIP and I'll copy over some tables that I've played around with to improve cold start.

[jspecmike]

i had a similar problem where the car wouldn't start unless i just barely cracked the throttle when starting. if you know you have good fuel pressure, open the TB screw a few turns. you will need to retune the Idle% vs. target table, of course.

After it starts, does the idle wander or does it stay pretty consistent? How are AFR's? do you need to keep the throttle cracked or can you let your foot off? Post your latest working CAL file in a ZIP and I'll copy over some tables that I've played around with to improve cold start.

heres a video of the car when I had it running at had dialed in the idle. So as you see the idle doesnt hunt, the afr was rich it was around 11, I was messing with it at one point and had it at 14.7 Also the throttle was not open when the car was running. Here is the latest CAL file that I know starts the car. Also tell me exactly how do I make sure timing is in sync with the EMS? Someone told me this
"You need to sync the timing to start. Down and dirty, go to configure - ecu setup - set ignition, set it at 20, as thats easy to see (assuming you get the car to start).

Press the +/- keys until you get it at 20. Then, again assuming your file you are using isn't junk, rev it up to see if the timing "drifts". By setting it at 20, it should lock at 20, if it advances or retards you need to adjust the pickup/delay comp in the Options --> Full list menu. 1g's typically end up 20-50, 2g's around 130. It makes minor changes so don't be afraid to make changes 10 at a time, as long as your AFR is okay you are good to go. "

[i3igpete]

ok, i added some tweaks to the engine start and cold fueling that should help. However, there are some very bad issues:

-MAP/MAF sensor is not set up correctly. Right now it is set to use a 0-5v MAF (not even the stock karman!), and the sensor is set to the 1 bar MAP sensor (non-turbo). This also explains why the load breakpoints are set up to 100kPa. This leads me to believe this is a CAL file from a non-turbo car.


-Injector delay was set for stock 360cc's, I changed this to evo 550's.

[i3igpete]

ok, in this one, I set the right MAP sensor to the 3.5 bar, disabled the MAF input, rescaled the axes, and gave you a copy of my timing and fuel tables (rescaled). Also played with the microsec/bit value to give you better fueling resolution. I also switched you over to using boost comp.

Remaining issues for you to work out yourself tonight:
-Idle% vs Target table is way too flat. mine goes from 30% at 700RPM to 100% at 1800RPM.
-My fuel curve peaks near redline. Since you don't have cams, yours will peak a lot sooner (somewhere around 4500). The fuel curve reflects the engine's volumetric efficiency curve. do a pull at wastegate boost and report back with a video if possible.

fire it up and give it a drive around the block, let me know how it goes.

[jspecmike]

Just cranks :*( no start not even a sputter.

http://www.youtube.com/watch?v=Ka8XcPuTIXU

[i3igpete]

whoops, try this one. i forgot to rescale the crank injector time table to match the new microsec/bit i used.