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2003 Chevrolet Venture Question: KNOCK SENSOR

 

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mary5150, 3.4L V6, Tehama, CA, December 05, 2012, 08:36
 Rookie

HELLO, I NEED HELP WHAT IS A KNOCK SENSOR AN WHAT DOSE IT DO I JUST WANT TO SIT DOWN AN CRY THE OIL PRESSURE DON'T KNOW WHAT TO DO IT USE TO KNOCK A LITTLE WHEN FIRST START VAN UNTIL WARM UP BUT SENSE THE OIL PRESSURE ACTING FUNNY IT KNOCK'S ALL THE TIME IM ON DISABILITY AN CAN'T AFFORD TO TAKE IT IN TO GET HELP SOME OF YOU ANSWERED THIS BUT IT WON'T ALLOW ME TO REPLY BACK I CHECK MY OIL LEVEL AN IT'S FULL WHEN I BOUGHT IT OFF THIS CAR LOT THE VAN NEVER HAD OIL CHANGE OR TRANNY FLUID HAD 179,000 MILE'S ON IT WHEN I GOT IT PEOPLE AT TRANNY PLACE SAID IF THEY KNEW IT WAS AS DARK AS IT WAS WOULDN'T HAVE TOUCHED IT I'M PAYING PAYMENT'S ON IT AN THIS CAR LOT IS A JOKE

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  • Answer #1

    Greg's Orange Auto (12262 Answers) , Orange, CA - (714) 361-9386
    globalhelper December 05, 2012, 13:11
     Master

    the knock sensor controls timing and controls eng timing and retards so eng will not ping upon excelleration. it WILL NOT STOP AN ENG KNOCK. you may have lost oil pressure and caused internal eng damage. sorry

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  • Answer #2

    your.mechanic December 06, 2012, 11:14
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     Master

    MARY, A KNOCK SENSOR SENSES KNOCKS...TO PUT IT MORE TECHNICALLY...THE ENGINE RUNS BETTER AT MORE ADVANCED TIMING UNTIL A CERTAIN POINT...THAT POINT WILL CAUSE ENGINE KNOCK...THE KNOCK SENSOR DETECTS THIS KNOCKING AND RETARDS THE ENGINE TIMING TO ELIMINATE THE KNOCK.....UNFORTUNATELY IN YOUR CASE, THE ENGINE IS KNOCKING DUE TO RUNNING IT WITH LOW OR NO OIL PRESSURE...THIS CAUSED DAMAGE TO THE ENGINE NOW THAT YOU HEAR KNOCKING CONSTANTLY...DISABLED OR NOT, YOU NEEDED TO FIX THAT OIL PRESSURE PROBLEM BEFORE...NOT AFTER NEGLECTING YOUR ENGINE AND THUS...DESTROYING IT IN THE PROCESS...IT IS NOT FUNNY THAT YOU HAVE TO PAY FOR THIS VAN YOU CANNOT USE, YOU GOTTA HAVE A MECHANIC LOOK AT A CAR BEFORE YOU BUY ONE NEXT TIME...

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