s2kseven

This car used to run using AEM EMS.

Now, i have a problem...it will not start but it will crank and sometimes momentarily run and die.
I attached a fuel pressure gauge at the rail side of the hose (not in the return)

Question: when you turn the ignition on (engine not running), does it supposed to be over 60psi right away??
Look like my pressure is ok.

I also replaced the crankshaft sensor..still will not run. I have AEM ems as my ecu.
I'm new to AEM EMS (not series 2, the older one)- How can I find if I have cel # using AEM?
Wonder if any of the sensor is bad or is there anything I can do to reset the ECU????

I have Lotus 7 type car.

jh4db536

sounds like a MAP sensor malfunction? (since it starts but dies immediately after)
check fuel pump and relay, check fuel pump settings in AEM Tuner (is the fuel pressure dropping when it is trying to start?)
load a S2000 basemap and see if it starts (rule out a fudged calibration file...backup your current cal)

there is a sensor tab in AEMTuner
you can plug in the laptop, turn the key to light up the dash (don't start car), and get to the Sensor Tab and itll display all the sensors.

stock fuel pressure (at WOT/zero vacuum, hose disconnected) is 47 to 54PSIg

s2kseven

thanks JH - i have extra map sensor and i will try that. i remember, i accidentally wiggled the map sensor an it runs for a while...then died.
from then on the problem persisted.
Yes I tested the injector and ecu relays and they are all working.
As soon as I turn the ignition on, the fuel pressure will immediately goes to 60psi or more (my gauge is only 60psi, the needle all the way up)
During cranking and trying to start...the fuel pressure still at 60psi.

I'm new to AEM and I will try to load the latest software - backup my current file -- check the sensor tab - see if it will tell me some sensor problem.

...oh by the way, I've been reading here this word "map wack" - what does it mean?