Yaris sedan sputters after a cold start!! CT Scott pls help if you're out there!!!!

[CTScott]

Originally Posted by tyrone_yaris

So if its below 18 shld I presume its a plugged fuel filter?

Yes

[tyrone_yaris]

Originally Posted by CTScott

Yes

Thanks will keep you updated.......

[seth_man]

other way around, less than 14.7 would be rich and above 14.7 is a lean mixture, cold start air fuel ratio on our cars running properly near freezing should be in the low 12's and will vary a little with ambient temperature

[CTScott]

Originally Posted by seth_man

other way around, less than 14.7 would be rich and above 14.7 is a lean mixture, cold start air fuel ratio on our cars running properly near freezing should be in the low 12's and will vary a little with ambient temperature

Yeah - That's correct - I must have been half asleep when I posted that this morning. 13.8 (which is rich) is the AFR that the ECM targets during cold start. 18 (which is lean) is actually the AFR seen during DFCO.