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I drive a biofuel opel corsa. Last time when i switched from CNG to gasoline to i am getting knocking sound near acceleration pedal. The sound usually comes when i shift from higher gear to lower. for eg when m on low speed and shift from 3 to 2 my engine stops and break pedal gets stuck. as soon as i release the clutch pedal engine produces a loud knock comparable to a medium size cracker. i am concerned why my break pedal gets stuck and engines stops in middle. It didnt happened while running on CNG. Please help...

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  • 109 Answers

IF YOU ARE HAVING BRAKES PROBLEMS THEN YOU NEED TO STOP DRIVING VEHICLE... get it check by dealer repair should be covered under warranty
sounds like a computer software problem

Posted on May 13, 2017

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Posted on Jan 02, 2017

  • 51 Answers

SOURCE: Engine knock when going uphill +...

Oil pressure might actually be a bit high for idle. High or low oil pressure in an older engine tends to be indicative of some serious issues. Oil pressure that is too high tends to be a clue that you have serious carbon build up. That aside, have you tried running a higher octane fuel, or perhaps adding an octane booster to your normal grade? Pinging can become knocking in a badly worn engine. One recommendation: At your next oil change try substituting a quart of marvel mystery oil or lucas engine oil treatment in place of one quart of your normal oil. Both have some pretty good track records for helping to free up sticking valves and break up carbon in older engines. I'm an old timer myself, and I personally swear by Marvel for older engines. There is no "rebuild in a can" but Marvel comes close. Give those a shot, let me know what happens.

Posted on Feb 06, 2009

suterman
  • 158 Answers

SOURCE: I HAVE 02 TRAILBLAZER LTZ, AND IT JUST STARTED

Hello, I see you have a trailblaber with a knocking noise. It sounds like you have an electric fan clutch issue. Believe it or not your vehicle has an electric fan clutch. It looks just like the older non-electric but if you look on the driver side of the fan shroud that is the wire connector you see. It is an exspensive part just for the clutch but thats exactly what you are describing. It doesn't get louder just fast with rpms. Please rate my answer, Thank you

Posted on Mar 06, 2009

  • 6982 Answers

SOURCE: Loud Knocking when pressing on gas pedal

What you are describing sounds like you have an engine bearing failing. Do not drive it 'till you have it diagnosed and repaired (most times though it's too late when you hear it.)..... Outside chance it could be the trans flex plate but I doubt it.

Posted on Apr 22, 2009

wracefans24
  • 1985 Answers

SOURCE: Intrepid Does not Shift & Speedometer Inoperative

Check the output sensor on the transmission,
With out a speedometer the transmission does not know how fast you are going or when it should shift

Posted on Dec 02, 2009

Testimonial: "Simple but prudent comments led to a perfect and inexpensive solution. Thanks!"

  • 7 Answers

SOURCE: 1988 Mercedes Benz 300E 3.0L Gasoline F.I. ''Sputtering at Idle

ok..you must have more than one car???? you don't drive the 300 atall im guessing. #1 start car drive up the road and \back to your house. #2 let it idle till problem starts. #3 once it does start with the problem keep it alive with the gas pedal. #4 once your have it safely from dying in higher rpms "rev it" like a kid would, you know like if you were gonna race some one lol. be careful not to over rev or damage engine. you should do this for five minutes no longer than that. #5 let it idle for another 5 minutes. #6 repeat every day until problem with idling decipates. it took mine 3 300e like 3 days of this. if your not going to drive the car once you get the problem out of the way. turn the car on everyday and let it idle for 5 minutes atleast and take it for a short drive once a week. they get lonelly you know lol. later on you can just turn the car on every 2 -3 days and let it idle but still take it on a short drive atleast once a week

Posted on Feb 27, 2010

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