hello guys!! Yesterday I started my car (new rebuild motor) and put bigger injectors...

Right now the car have a reflash for all new mods and 1,000cc injectors, but the AFR is in 12.3 12.9, and I can´t do anything about it! i don´t have the stock injectors, but what can we do???

I think my problem is: my Evo is 4 (jdm) OBDI and I swap the Evo 8 ecu, and the 02 sensor is diferent (evo 4 to 8) evo 4 has 2 lines and Evo8 has 4 lines, so I think that is one problem, but you think for break in the engine is too rich that AFR???

 

Yes it is. Have u gotten the car tuned yet? I always tune low throttle settings asap. Ill start the motor check for leaks on rebuilds then head straight for the dyno to tune the low throttle so there's no chance of washing the walls.

 

That is too LEAN, not rich. Have you checked for boost leaks?

 

Thanx for your answers guys!!!

Right now i´m doing the engine braek in. The car in minimal (850-900 RPM) is in 12.3-12.6 the air fuel.

When I run the car like 2,500 rpm is in 11.5-11.9

The car is tune for those injectors.

 

Im pretty sure he is talking about his closed loop afrs. But I dont think that is rich enough to wash out your cylinders But I would try to get it taken care of asap.

 

that car is running 2 lean! where do you get that the car is running rich???!

Either way that AFR will be good for a 500 miles break in motor, LOL.

 

It is rich, usually the car will run around 14.7 during cruise. During WOT I would agree that afr is lean but he isn't driving the car WOT.

 

Are you high? He's breaking a motor in. So I highly doubt he is running it at wot. A afr of 12 at idle or cruise is too rich. Now if it was being ran at wot then yes 12 is lean but I wouldn be worried about afr if its a fresh motor and was beating the **** out of it before break in.

 

Any. Check engine light?
Sounds like your o2 heater isn't connected.

 

dude its lean... no dude its rich!

You'll be fine man, 12's isn't actually that rich persay... if you were under decent load in low boost you would see similar fuel ratio anyways during break in.
Either way you need to get it out, if you were in the 10's that could be a problem.

 

Ok thanx to every body... i think is too rich.. I´m not driving the car WOT... Only have right now 50 km (31 miles) so, I drive too slow in this moment... The AFR is in 12.8 with pikes of 13.0-13.1 is better with some adjust in the reflash, so Can I not worry for my motor????

 

i want the people that think it lean to tel me why? he said he started his car. he didnt say he went out and did pulls. 12.3 at idle is way rich

 

I would say your only Chance of washing the walls would be from
misfire events

 

I also would like to know why people think it is too lean. A "stoichiometric" A/F ratio is 14.7. Anything lower than that is RICHER anything higher than that is LEANER. As stated before if a 12.9 A/F under WOT was present than yes that would be way lean. Unless your running E-85, but then again that still seems too lean. but I don't think that's the case

 

some people need to stop givin stupid advice, thats gonna confuse op anymore, some people were right at idle it is way rich idle and cruise trims u want the afr to be between 14.7-15.2...thats ideal afrs for idle/cruising, sounds like u need to have ur injectors scaled properly, then take care of adjusting timing in the 0-140 load cells, that should get u content until you can get on a dyno and get wot taken care of. there ya go answered.