DOES YOUR CHECK ENGINE LIGHT WORK WHEN YOU CRANK UP. VERIFYING THAT IT WORKS?
IS IT ON NOW?
IF IT'S ON, OR DOES NOT WORK--YOU MAY HAVE CODES
GET IT CODED----YOU MAY HAVE A SENSOR NOT WORKING
WE GOT TWO "LOOPS"---"OPEN" AND "CLOSED"
OPEN MEANS THE SENSORS ARE GIVING THE COMPUTER "REAL TIME" INFO, EXAMPLE: O2 SENSOR IS TELLING THE COMPUTER THE OXYGEN CONTENT IN THE EXHAUST SO IT CAN ADJUST THE INJECTORS TO GET THE MOST EFFICIENT "BURN" POSSIBLE
BEING THAT IT TAKES A BIT FOR THE O2 TO WARM UP TO "TRANSMIT" INFO. HOW DOES THE ENGINE RUN?
THE ENGINE RUNS "CLOSED LOOP"---WHICH MEANS THE COMPUTER HAS "PRESET" VALUES PROGRAMMED INTO IT--IT RUNS OFF OF THEM, UNTIL ALL SENSORS COME ON-LINE. CLOSED LOOP SORTA MEANS, "FED FALSE INFO", THAT WILL MAKE THE ENGINE RUN---THIS "LOOP" IS NOT EFFICIENT, USUALLY YOU WILL NOTICE IT RUNS RICH--MPG GOES DOWN!
THIS IS NOT ONLY TRUE FOR THE O2 SENSORS, BUT OTHER SENSORS NOT WORKING WILL CAUSE THIS (STAYING IN CLOSED LOOP)---CLOSED LOOP IS BASICALLY "DEFAULT"
I'M NOT GREAT ON NEWER VEHICLES, IMMA JEEP CJ KINDA GUY '40-'86 IS WHAT I KNOW THE BEST. BEFORE COMPUTERS!
IF I GET IN OVER MY HEAD, I WILL GRAB ANOTHER EXPERT TO COME IN AND HELP OUT. YOUR RIG IS PROBABLY "OBD I". AN AUTO PARTS STORE MAY NOT BE ABLE TO EXTRACT YOUR CODES. WON'T HURT TO ASK, OR ASK WHO CAN DO IT. WRITE YOUR CODES DOWN, POST 'EM FOR US, I'VE SEEN DIFFERENT INTERPRETATIONS, FOR A CODE, YOU MAY NOT GET THE FULL STORY FROM WHO EVER CODES IT (THEN AGAIN, THEY COULD BE DEAD ON)
THE MEDIC
Saturday, November 5th, 2011 AT 10:38 PM