Engine ping under light throttle

DOOMMONKEY777

Remembering now, some one came to me with a low rpm engine knock, asked me what is wrong, as i remember the car was at idle and you can hear the valves ticking like a slight knock, then pass 1500rpm it goes away.

Solution, changed brand of oil used in the engine from Valvoline to Royal purple or Nissan Easter oil 5w-30.

The tick was gone, but in my opinion it does that on old oil.(filter is clogged and less oil travel through the engine during low rpm.)

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Kids don't do Drugs, Drugs are bad, so let the professional druggies do Drugs for you. 537whp/496lb/tq@8-9PSI 93 octane

nis350

the engine is quiet and smooth during idle or any other rpm. I am familiar with the ticking (vvel) and that's not it. The ping only occurs occasionally during take off from stop or rolling as described above. It doesn't occur under any other situation. I can floor it at 2000 rpm and it runs just fine.

I read a bit about the MAP senor you mentioned. It appears to detect the engine vacuum and send signal to the ecu etc.... Can it be cleaned with MAF cleaner without damaging the internal of the sensor which might contain rubber components? Wouldn't it also throw a P0106 code for the bad MAP sensor?

DOOMMONKEY777

Nop, mine didnt, i mean it was .4V off, and didnt trigger the fault, it did trigger all O2 sensors like flame.....actually i later found bank two O2 sensor2 was bad, but this due to the MAP being off by a bit and when i floored it at high rpm the fuel delivery is set to 11.40afr(stock), the MAP sensor was flooding it 10.xxafr.....which destroyed my O2 sensor+cat. In any case i was thinking it could have leaned it out and cause slight ping, on load.

In this case get a Torque App and a Bluetooth OBII adapter. Check out ur fuel delivery at these rpms and maybe it might have a the ability to see what the KNOCK sensors are showing.(i dont own the app, i use Uprev tuner.)

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Kids don't do Drugs, Drugs are bad, so let the professional druggies do Drugs for you. 537whp/496lb/tq@8-9PSI 93 octane

B&W_Evader

Very simple... Don't load up (giving it gas) the engine below 2000rpm. The VVEL runs exceptionally well at low RPMs but no engine likes being run hard below 2k. If it sounds funny, don't run it there. Your're gong to f-up your engine! If you're launching a manual off the line you should be starting at 3-4k and feathering the clutch. In an automatic you can ride the brakes for a second or two to bring up the rpm (while in drive of course) for launch. Don't do it for too long since it's pretty hard on the transmission and will heat up your fluid quickly.

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nis350

maybe but it is just a workaround for a potential problem...

I'm looking for a solution.