Nissan Repair Questions? Ask a Mechanic for Answers ASAP
Hello my names is Jay and thank you for your question.
How many miles do you have on the car and what brand spark plugs do you have installed? Do you know?
95 to 98 Octane is Racing fuel. The most I have seen is 93 octane. Also do you get gas at the same station all the time?
Ok.. Well first thing you need to do is find out what brand spark plugs were installed. These engines only like NGK spark plugs. If any other plug has been used, it can certainly cause this.
Also do get gas at the same station all the time?
I am in the USA and very familiar with octane ping. Knock Sensors are designed to advance and retard the ignition timing to help prevent Octane ping. You may want to see if you have a code for it. But if you don't have NGK spark plugs installed, that will certainly cause this as well as causing the engine to run ruff. The worse plug you could have installed is Bosch. Bosch plugs are the worst plugs for these cars. You need to stick with the factory NGKs and then scan the car to see if there is a knock sensor code stored. If you have a knock sensor code stored, you are going to want to replace that.
If you get gas at the same station all the time, I would recommend you try getting gas from a different station and see if that helps as well.
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Were you able to find out the brand spark plugs?
ok. good, these engines were designed to use NGK's. The only other thing I can think of is if the knock sensor is bad. That will advance and retard the timing to eliminate octane ping. The knock sensor will not throw a Service Engine Soon light. But you will need to see if there is a code stored for it. If there is, then that will need to be replaced.
If there isn't, then I would look at the timing to see if something is off with that causing the octane ping.
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