MSefi.com read only forum (Jan.15,2018)

well ive figured it out. One of the three polyfuses on the relayboard had worn out. so when the car got hot and underhood temperatures rose, it shut off power to my ecu. However, this does not explain why that didnt show up in the datalogs. when the car was failing, the voltage shown by the ecu was ...

ok ive check relays via testers. the stay on consistently throughout the entire process. could voltage spike be causing this? from my dodgy alternator?

ok so i have replaced the ignition module and coil. still the same problem. also i'm running edis4. a datalog is attached. i cannot gather any conclusions from the datalog. the ecu still appears to be telling the injectors to fire. and ive replaced the coil and ignition module. any ideas?

edit ...

So Ive been running MS2, v3 board, for about 2 years now. Im running a standard relay board under the hood. the ecu is located in a cool position under the dash.
ive been having problems with the ecu messing up after the car is warm. the problem is especially bad when i come to a stop light and ...