Ganyan din sakin Sir ang lakas sa gas.
Honda Civic 97
Kaka change lang ng engine. after 3 mos nag check engine. Bumili ako ng OBD II scanner kaso mali ang socket di pareho sa akin. So nag youtube ako, nakita ko yung oldschool na diagnostics, nalaman ko na 02 sensor sa ilalim problema. Sinilip ko patay ang sensor. Mukhang nagmadali ang pagkakabit sa engine ko. Pero Duda din ako kung yun nga dahilan baka meron p iba. San kaya pwde magpacheck yung reliable mechanic talaga na hindi nanaga. Salamat po!

Quote Originally Posted by bambino View Post
sa O2 sensor makikita kung bakit rich yan .

sample scenarios are ;

if the O2 sensor is lazy and stuck at low,the result will be rich ,why ? it's because the ECM was seeing it as a very lean condition.

coolant sensor ,if it stucked at cold ( 4-5 v reading is considered cold) the computer will give more fuel .

or if the vacuum is low the map sensor will make it rich too (if equipped)

alot of things to be checked first before attempting to change any major parts suspected.

the best thing to do is you to find a shop who is specialized in ENGINE DIAGNOSTICS not the shops who can only change parts and get lucky .

otherwise you're at risk of getting the same results and that will be a problem.