Poor cold start, EDM 4G63

[Dvolution]

My IV has a USDM 260 ecu running an EDM Evo 8 engine. The engine started great the first try, even though it had 2 CEL's for the missing EGR. Once I disabled the EGR in the FAA and FCC periphery, the engine began to have trouble on cold starts.

The engine will maybe fire on 2 cylinders and then just continue cranking.

If I stop cranking exactly when it fires those couple times I can get it to start but it stumbles for 5-10 seconds until RPM raises to idle.

If I let it crank past those 2 little sparks, stop, and then continue cranking it starts perfect without turning 1 revolution; like it had compression, just didn't give fuel or spark.

To summarize: It starts fine but only if I turn the key twice.

 

[Simon@NTS]

Running a modified rom by any chance?

 

[Dvolution]

Tephra v7, dont know what is done to the maps but it needed to have the injector latency modified before it would run properly as it was set up for larger ones. AFR's stay rich (11.2) even after the engine has warmed up sometimes, then suddenly kick up to 14.7, so the rom will need to be tweaked for sure.