S2000 Under The Hood S2000 Technical and Mechanical discussions.

E-Manage and 550cc installed, but i have still some questions!

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Old 05-30-2004, 03:06 PM
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what is your AF ratio at idle?
Old 05-31-2004, 02:01 AM
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Because i let all settings to 0, it is running lean at idle (14.5:1 - 14.7:1).

I once added some fuel and the wideband goes down to 12.7:1. I done some driving with map trace than and on the position when it goes from the richer setting to the 0 setting it bogs.

I guess is should add more fuel, right?


I will phone with a tuner tomorrow, which have some e-manage experience. Hopefully he can help me out and tunning my car, because its more difficult as i thought (i am a newbie in such things)
Old 05-31-2004, 03:52 AM
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Ohh one thing wonders me too:

After the car stands some time, fully cooled down and i turn the key to "On" i sometime hear a loud pop from the engine bay!
But after i start the car no CEL and it idles really good. What could this loud pop-sound be?
Old 05-31-2004, 04:18 AM
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Originally posted by Salaska
Because i let all settings to 0, it is running lean at idle (14.5:1 - 14.7:1).

I once added some fuel and the wideband goes down to 12.7:1. I done some driving with map trace than and on the position when it goes from the richer setting to the 0 setting it bogs.

I guess is should add more fuel, right?
I will phone with a tuner tomorrow, which have some e-manage experience. Hopefully he can help me out and tunning my car, because its more difficult as i thought (i am a newbie in such things)
It will always run 14.7 at idle and normal (close loop) driving. You need to tune for WOT conditions.
Old 05-31-2004, 04:20 AM
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Originally posted by Salaska
Ohh one thing wonders me too:

After the car stands some time, fully cooled down and i turn the key to "On" i sometime hear a loud pop from the engine bay!
But after i start the car no CEL and it idles really good. What could this loud pop-sound be?
Recheck that your injectors are seated correctly.
Old 05-31-2004, 04:44 AM
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[QUOTE]Originally posted by fperra
Old 05-31-2004, 04:45 AM
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And here 2 pics from the installed spacers:



Old 05-31-2004, 11:34 AM
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It seems i have found the problem!

The base injector size of 360 was to big. I switched down to 290 and the car idles crappy and was way to lean. So i switched to 330cc as base injector size. Now i noticed no bogging even after a longer testdrive.

I accelerated my car very carefully and stayed under 4000k rpm.

My wideband showed numbers from 13.8:1 - 15.7:1, but its hard to point the correct numbers out, because it seems the stock ecu try to compensate it.

The pop-sound which comes up, when my car stands longer and i turn the ignition on (not starting the car) is still there. Maybe its because my car was running very rich before and some fuel detonated?


BTW: Could it be also possible that the PLX M-300 is not calibrated correctly and shows leaner numbers as they real are?


Questions over questions, but at the moment this board is my only help
Old 05-31-2004, 01:30 PM
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PLX is self calibrated


I do not remember a pop sound when started the engine


According to martucci stock injectors flows 380 cc at 42 psi
Old 05-31-2004, 01:42 PM
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Originally posted by S2000_Europe
PLX is self calibrated
I do not remember a pop sound when started the engine
According to martucci stock injectors flows 380 cc at 42 psi
I also tested it with 380cc as base, but my car runs not more than 3 minutes without bogging. Also the A/F Rate at this setting was down to 10.5:1 - 11:1 at low rpm's. That must be to rich

At the moment it is most important that i can drive my car to the tuner (120 km away)


Quick Reply: E-Manage and 550cc installed, but i have still some questions!



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