Hi guys, i just did a light engine build, rods and studs also upgraded the fuel system to - surge tank and 2x044 externals, also switched from 60lb injectors to 80s

I started the car for the first time yesterday with just one (1) lambda sensor, the other one was tuck on my old exhaust, and i will have it tomorrow morning.

Engine sounds well but i can see a flashing CEL, i checked with durametric and i cant see any code .... i will try to log specifically each cylinder for misfires tomorrow.

I will replace also the missing lambda but i dont know if this is the reason for this flashing CEL, any other ideas or experience with this ?

Unfortunately i had a major oil leak from an o-ring and i had to take out again the engine to fix that... i hope to put it back on and fix that, please advise

I have pretty new coils, new spark plugs ( i will put the old ones back to check), new injectors and pumps, i verified the rail pressure and is 55psi and goes down to 40 something when powering up... in my opinion car is running rich right now but i am not sure of that

I will try after that to use my old tune in case there is something wrong with this tune, maybe i will get lucky and the missing lambda will fix this...