Engine Ping

[Maverick]

Hi All,

I'm new on the site and would really appreciate your advice on the under mentioned.

1. When I accelerate in a normal manner and the car shifts to high gear at low speed the motor pings. This only happens when the engine is at operating temperature. How is this possible with a VVT motor?

2. Can I take out all the CAT Converters and replace it with a straight pipe?

[RkyMtnHi]

Originally Posted by Maverick

Hi All,

I'm new on the site and would really appreciate your advice on the under mentioned.

1. When I accelerate in a normal manner and the car shifts to high gear at low speed the motor pings. This only happens when the engine is at operating temperature. How is this possible with a VVT motor?

2. Can I take out all the CAT Converters and replace it with a straight pipe?

Are you using 87 octane fuel?

[HVT]

Need more info. Depending on the year Murano, you may need to be using premium fuel.

[Maverick]

I drive the 2007 model and the octane is 95.

[HVT]

95? where are you from?

[Maverick]

I live in Namibia, Africa. Northwest of South Africa, underneath Angola. Why?

[miloca1983]

i think you should be using 87 octane. 95 octane is not needed aint it?


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[Maverick]

The lowest octane fuel we get here is 93. Are you saying that the octane is too high?

[Pilgrim]

High octane will not cause ping, and my 07 will run fine on 87 octane. Cars simply do not use octane higher than that which they require.

However, a problem with the engine (such as deposits on the pistons) coupled with a faulty knock sensor can allow ping to occur. I'm wondering if something is causing the engine to ping and a faulty knock sensor is making the engine unable to adjust its timing to compensate.