I asked a few days ago about my car making noises similar to baseball cards in a bike only while accelerating. I had my father check out my car since he was a mechanic a while back. He said that the transmission and exhaust was just fine. He mentioned that since the car is a Mazda millennia S with a supercharged engine that it was being caused by my using the cheapest grade of gas and that by switching to premium would correct it. I have only been driving this car for a few days but since this ticking occurred I haven't notice any decrease in performance. I was just wondering if I could get a second opinion on his dianogis. Thank you.
2007-01-13 14:16:07 · 7 answers · asked by weaselred 1 in Cars & Transportation ➔ Maintenance & Repairs
Look at the fill opening for you gas tank, it generally tells the grade of gas to use. Since you say it is turbocharged, I'm guessing it will say premium fuel. 91 or 92 Octane.
2007-01-13 19:47:46 · answer #1 · answered by eferrell01 7 · 0⤊ 0⤋
Considering the engine is supercharged I would have to say that low octane gasoline is probably your problem. The reason for this is that gasoline when put under enough heat and pressure (as supercharging will do) ignites uncontrolably aka. compression detonation, so pretty much what your hearing is explosions in your engine. As far as fuel is concerned in laymans terms octane rating is how well the fuel can prevent this the higher the rating the better detonation prevention. So having that said low octane fuel is most likely your problem. Try putting some high octane in it and it should solve the knocking.
2007-01-13 16:05:44 · answer #2 · answered by ox_a_perfect_circle_xo 2 · 0⤊ 0⤋
The Millennia S has higher than normal compression caused by boost, so cheap gas causes detonation making the sounds you hear on acceleration. So you'll have to run the more expensive gas. If you run the cheap stuff the detonation can eat through your head gasket, and that is something you don't want.
2007-01-13 15:32:46 · answer #3 · answered by the Car guy 3 · 0⤊ 0⤋
if you're running regular grade fuel in an engine designed for premium, detonation will occur. pinging. could be the noise you are hearing. regular fuel in a higher compression engine explodes instead of burning at a controlled pace. premium fuel burns slower,we're only talking about milliseconds here, and the detonation should go away after a tank.
2007-01-13 14:49:10 · answer #4 · answered by Anonymous · 1⤊ 0⤋
He probably meant you need a high octane fuel in it not the low grade stuff. 91 +
2007-01-13 14:31:52 · answer #5 · answered by wheeler 5 · 0⤊ 0⤋
cheap gas can be a problem
2007-01-13 14:20:10 · answer #6 · answered by furmanator1957 4 · 0⤊ 0⤋
it could be a belt or something. maybe you need to get your tires rotated
2007-01-13 14:20:57 · answer #7 · answered by crazy 2 · 0⤊ 1⤋