HELP!! engine noise
bigshot82
08-19-2008, 12:02 PM
engine makes a (rather faint) tapping noise when I try to accelerate. I am kind of confused, because it is good during idling(so it can't be the engine!) and it is also good when I'm driving but not pressing on the gas pedal(so it can't be transmission/tires!)
noise is present only when I try to accelerate, around 40 MPH.
its a Mazda Protege 2001, manual transmission.
noise is present only when I try to accelerate, around 40 MPH.
its a Mazda Protege 2001, manual transmission.
Flash75
08-19-2008, 07:44 PM
The engine being quiet at idle don't indicate the engine is good. It can have a noise under load and be quiet at idle or no laod speeds. Sounds like you may have a spark knock, (pinging). A little better description of how the noise you hear sounds may help.
Clifton
Clifton
bigshot82
08-19-2008, 08:55 PM
its like a rattling noise... engine goes "da da da da da " as I hold the gas pedal steady.
just put a bottle of octane booster in the tank... didn't help.
just put a bottle of octane booster in the tank... didn't help.
Flash75
08-20-2008, 05:50 AM
Your car should have a knock sensor. Sounds like you are describing spark knock. Check the knock sensor and replace it if bad. I don't know where it is on your car but it is probably bolted to the block.
Clifton
Clifton
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