S2000 Under The Hood S2000 Technical and Mechanical discussions.

any other AEM EMS problems?

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Old Nov 22, 2004 | 01:54 PM
  #11  
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- im going to have UL (shawn/sean) tune my shit, but not sure if he fuucks with idling...
- I just hope everything else is fine (functions) like: heater, ac, and all that other little shit...
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Old Nov 22, 2004 | 02:20 PM
  #12  
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Originally Posted by AMKS2000,Nov 22 2004, 11:57 PM
i have a problem getting the car started when it heats up...... sometimes when i drive the car for say 10 to 15mins the car wont start until it cools down,,,,, thats 15mins later...... what can that be?
Do you have a wideband? It will be easier to tune idle and start with it.

your coolant obviously got heated while driving/idle
if you have too much fuel or too little for this coolant temperature then the car will have difficulty starting. You will need to find out what coolant temp you have problem with and play with your warm up enrichment table.

The air intake system also get heated during cooling down period. You will need to crank a little bit longer to get cooler air into the engine for starting. I've yet to find a table to adjust starting fuel Vs air temp. May be you guys have found it and give me a hand.
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Old Nov 22, 2004 | 02:30 PM
  #13  
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Oh I just fixed this last night.
I got 2 maps from 2 reputable people a long time ago . One is well know tuner from the US. Both maps are for supercharged s2k. Sorry to say but both maps came from bad timing sync alignments. One map say 17+ at idle and the other was 1+ degree You can't really blame the tuner as the customer prob did the timing alignment.

I worked from the 17+ degree at idle ignition map (as this came from the tuner) I've also setted my timing at TDC because of lack of instruction from AEM and the supercharger bracket was in the way. Not that bad of a mistake but the ignition map looks so amateur and the car would have been more responsive on take off Oh well it's only part of the learnin gcurve

Anyway, I got it fixed last night and I think this is a better way of doing it (it helps with the SC off the car):
-Idle timing is at 5.15 (should be at 5 +/- 2 degrees).
-Timing sync should be adjusted until the timing light hit the red mark.
The car certainly feels a little bit more responsive in low rev.
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Old Nov 22, 2004 | 02:52 PM
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Fltsfshr, feel free to chime in here, but if you set the CEL to come on as a high temperature warning are you not also giving up on using it to show a lean condition? Maybe there's a way to preserve both functions, but I'd much rather know when I'm running lean than have the CEL come on when engine's hot. My two cents (and I've got a pretty big aftermarket radiator, so my temps, now never hit more than 195 degrees on the track).

CB
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Old Nov 22, 2004 | 03:01 PM
  #15  
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I think you're right cbender.

With the lower t stat n things I stay pretty cool now too. Right now I'm dependent on the uego to tell me if a lean condition exists and my gauges are not at an eye level shot. I'm working out a sequential shift light with a heads up display that goes in the slot in front of the windshield driven by the AEM.
Maybe I can incorporate a different light up there where I'm more likely to see it.

fltsfshr
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Old Nov 22, 2004 | 03:14 PM
  #16  
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There are lots of ways to skin this cat. I find that I can only keep track of few engine parameters while I'm actually on the track, and that's about the only time I drive the car hard enough to have to worry about something going amiss.

So, for the track, I've got the EMS set up to report a lean condition with the CEL. Modifry is currently working on a device to "fix" the ECT gauge with the EMS (see the Electronics forum), which will let the user define how the bar-gauge operates (very cool). I then watch my boost and EGT gauges. Then, I datalog with the laptop to insure that my ECT and oil temperatures are reasonable, and I'm not getting much, if any, knock retardation. For street driving, I don't really have to worry about ECTs and oil temperatures (I've done enough datalogging to know those are pretty well sorted out), so I just watch the EGT and boost gauges, and I've still got the CEL in case something goes wrong to warn me of a lean condition under boost.

But, more than that, I'm not sure I can keep track of it. And, morever, some of these things shouldn't go wrong anyway (if you've got an appropriate radiator and oil cooler, for example, those fluids should stay within reasonable bounds), and, if they do go suddenly wrong, there's probably not much you're going to be able to do about it before something breaks anyway. My two cents, but I'd rather use the laptop to do enough datalogging to get the car sorted out and then only have the car report those things I actually need to pay attention to. Anything more is just clutter. But I admit that others see this very differently.

Best,
CB
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Old Nov 22, 2004 | 10:44 PM
  #17  
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the start up problems are within in the tuning, you will probably need to modify the crank injector time table and/or initial crank pulse
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Old Nov 22, 2004 | 11:42 PM
  #18  
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Mase is correct as this was the problem on mine for the decel issue, my tuner had to phone sean/shawn from Torquefreaks to get his help on this them tables are well hidden
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Old Nov 23, 2004 | 02:26 AM
  #19  
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BTW, has any one had any success with the boost control function?
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Old Nov 23, 2004 | 04:24 AM
  #20  
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I use the Apexi boost solanoid linked upto the EMS which works great for me
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