Question about 2004 Porsche 911

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What will happen if i accidentally put unleaded petrol in my 2004 carrera 4s instead of super unleaded?

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It will ping and spark knock when you get to half a tank add premium if you here it spark knocking just accelerate and it should go away watch the temp gauge to make sure it dont over heat dont continue using regular unleaded it can hurt your engine / spark knock is a double explosion in the piston chamber and can damage the piston and or valves

Posted on May 28, 2011

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The least that could happen is absolutely nothing. On the other hand, you could start to hear "Pinging", IE, Pre-ignition, AKA Detonation. This is when the compression is so high that the fuel explodes before it reaches the top of the stroke. My advice? Drain the gas. On such an expensive car, no need to play dice.

Posted on May 28, 2011

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hello matilda,

im not sure if the reason is the leaded gasoline that you put, but if you want to replace the gasoline in the tank, you can trace if there is a drain bolt under the tank then drain the gas in the tank. be safety consious since your handling flamamble liquids. then if you can trace your fuel line that goes to the engine, you can flush that too with air. then when your sure that the tank is empty and the lines are clean, you can fill it up with your correct unleaded gas and have a good battery ready and crank your engine until the new gas is in the engine already and i hope it would start now.

i hope i was able to help you.

pls rate me..

tnx

drcool


Jul 22, 2008 | 1995 Dodge Dakota

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