Ping

[Nightcrawler]

Dude there is definitely something seriously wrong with your car. It should not ping. Ever. The ECU is smart enough to prevent detonation and retard timing a long time before you can hear pinging. My V35 makes 183rwkw and I drive it like I stole it, and it NEVER pings. I have an ear for it (my R34 used to ping depending on boost and fuel used).

Get a mechanic to check it out asap - at least get it on a dyno to check your afrs.

[PN-Mad]

I disagree. The ecu isn't that smart. You will hear the rattle a long time before the ecu drops into high det mode. In fact motors have been lost cause the ecu hasn't dropped into hi det.

Take your car to Nissan, and get them to plug it into consult. Your mechanics obd reader sounds shit. Ask them what the timing is set on, and if you can get them to check the ign timing is right. Should be 15 degrees at idle, at least that's for a DE. They can adjust static timing, and t might be worth getting them to reduce it.

[PN-Mad]

Oh, and get it sorted quick, cause every time you hear it, it's doing damage.

[Nightcrawler]

But how on earth would a 36k old engine be detonating? Like I said mine has been running 183rwkw and has now done 125,000km and I even drive it hard on the track and can't even hear it rattle EVER - it runs like a dream (admittedly I do have a bigger oil cooler, big alloy radiator and an oil cooler, but still). Let alone at low revs like the OP is stating.

[PN-Mad]

While being very dubious about any import being 36k Kms old, I'll let it slide because Kms has nothing to do with knock. Ping is most likely to occur in the peak torque range of the motor. That's why when you look at an ign map, through the mid range timing advance decreases and gets returned higher in the rev range.

As I said. Too much ign advance and or poor quality fuels, or fuel starvation. It needs to be put on consult and read as to what it's actually doing. Even stock Ecus have static timing adjustment which means you could make it ping.

[PN-Mad]

Have you changed the plugs recently?

I would have a guess and say you have a slightly blocked injector, or you're fuel pump is faulty. Have you changed the fuel pump?

If the intakes are leaking after the afm's it will cause it to run lean...

QFT.

[colin.ssc]

Yeah, I was not sure how to adjust the timing of the ECU using the OBD 2 scanner. I was told I should be able to change certain values on the ECU using the OBD 2. Was using my uncle's one, he owns an auto shop. I didn't know how to so I left it alone. Might go back and try it out later on again.

And yea my mechanic works at Nissan, am trying to book my car in so he can do it. I only went and test it out myself cause I couldnt get a hold of him as yet. And since my uncle has the tools I thought I'd give it a go too bad he doesn't have Consult III, he has the universal one for different car brands. Was quite impressed it worked on the V. Then again for the amount of $ he spent on it, it should have worked.

Edited April 12, 2013 by colin.ssc