S2000 Engine Management Engine management topics, map and advice.

AEM 1052 EMS Start up Issues

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Old Sep 25, 2014 | 10:58 PM
  #1  
S2KVee's Avatar
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Default AEM 1052 EMS Start up Issues

Just had a tune today... car made 340whp on a dynojet..

comptech supercharger 3.2" Pulley boosting 10psi, 900cc fic injectors, stock map sensor..

the car runs fine when moving. however idle is a bit rough, sometimes fluctuating as if the IACV is bad... but the main issue is, sometimes, idle will drop so low, i would stall out when clutched down or shift to neutral to coast..

start up is very difficult also, sometimes takes 2-3 even 4 times to start holding the button 5 seconds each time.. sometimes right after it starts ,it'll die out...

my tuner saids its a AEM thing, and it seems like he may be right however it also seems as if some users have better luck... any suggestions of how i can fix the start up and idle problem?...

like i said, when running, the car runs and drives great.. its just sometimes at idle and start up...
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Old Sep 26, 2014 | 01:04 AM
  #2  
solidol's Avatar
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Are you sure your MAP reads fine?
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Old Sep 26, 2014 | 05:43 AM
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look at the parameter stat syncd. when starting the car should fire up as soon as you see that go "ON" If it does not then you have a tuner issue.

Idle control is either a bad iac or tuner issue, not an "AEM thing" at all
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Old Sep 26, 2014 | 07:08 AM
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The starting up is an AEM thing. It takes 2-3 seconds before the AEM will even attempt to start the car. Typically I wait for the fuel pump to fully prime, and then try to start it, and it starts immediately.
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