06-12-2014, 01:46 AM
yes, the old ECU can be happy when all is bad. sadly. the old ECU have poor (1) monitors.
sure it can run perfect do you know that 12.5:1 AFR RICH HAS MORE POWER THAN STOCK (14.7:1 )
THE CAT IS DEAD TOO,
IF THE ENGINE IS too rich the cat will overheat. if replaced.
if its rich at idle we can test to see if the 02 sensor is working at idle
it swings from .2 to .8vdc. fast, like 3 to 6 times a second. this is called cross counting, or CLOSED LOOP, if no exhaust leaks and it crosscounts, the new cat will clean up all the remaining richness.
there is on scan tools sold but there is hacker tool. just 1. to see if ECU is happy. (near free tool, just a cable and level shifter)
See all 31 PIDS below.
http://rhinopower.activeboard.com/f48914...-software/
31 params here
see param 11. and LTFT #13 , fuel trim, tell lots about fuel trim if 02 is new.
http://www.fixkick.com/ECU/Tech1/full_scan2.html
sure it can run perfect do you know that 12.5:1 AFR RICH HAS MORE POWER THAN STOCK (14.7:1 )
THE CAT IS DEAD TOO,
IF THE ENGINE IS too rich the cat will overheat. if replaced.
if its rich at idle we can test to see if the 02 sensor is working at idle
it swings from .2 to .8vdc. fast, like 3 to 6 times a second. this is called cross counting, or CLOSED LOOP, if no exhaust leaks and it crosscounts, the new cat will clean up all the remaining richness.
there is on scan tools sold but there is hacker tool. just 1. to see if ECU is happy. (near free tool, just a cable and level shifter)
See all 31 PIDS below.
http://rhinopower.activeboard.com/f48914...-software/
31 params here
see param 11. and LTFT #13 , fuel trim, tell lots about fuel trim if 02 is new.
http://www.fixkick.com/ECU/Tech1/full_scan2.html
http://www.fixkick.com