Dear friends hello.Sorry about my English, im from Greece and i can't whrite perfect!
Somebody knows about fuel trims?Because i have some problem and i can't understand whats going on in my car!
I have an hho system and works perfect with 1,5lpm at 1400cc engine
I install an EFIE electronic with 2 o2 sensors and maf.
I install it correct and a have lean out all sensors in maximum position as the manual say.
I check all sensors with voltmeter and works good and in close loop condition
After all i take a scantool and check all parameters from ecu on obd2 port.
And the long fuel trim was +10!! The ecu reads lean and increase more fuel???
We calibrate the o2 to read rich no lean!What's going on there!
After all instalation take for a ride to test the gains and result.
My car accelerate more powerfull,a lot of torque increase,and fuel economy was great! 30% economy than before!
I have make a lot of changes in efie with different configurations and the Fuel trims always goes to + condition!Never see - at all.What's going on.Somebody knows about trims or ecu tuning?
Thanks a lot!