bad pinging from a l24e at WOT?

[Comrade_Charlie]

In my maxima with the l24e, in second gear at about 4000rpms I get really bad pinging sounds coming from the engine, what would cause detonation on a stock car? It pulls good for what 130hp. are the Injectors not flowing properly? the flapper on the afm being stuck? cap & rotor, spark plug wires, spark plugs? The engine has 129,000 miles on it and is completely stock.

 

Only thing I put on it when I got it was spark plugs, and I run 93oct, which doesnt seem to matter.

 

Planning on replacing the fuel lines soon seeing as how they are dry rotted, ill probably replace the injectors with a known good set of na z31 injectors if the CC's are the same.

[BleachZee]

Have you done a compression test and checked the ignition timing?

 

I prior owner may have shaved the head after warping it and possibly advanced the ignition. Running high octane fuel like you do should have solved the problem though.

[skib]

if it comes down to checking the ECU shoot me a PM, Iv got one laying around just collecting dust

[Comrade_Charlie]

Ill check compression & timing tomorow. It did it on 87 when i first got the car, now ive been running 93 and still the same. What should timing be.

[Comrade_Charlie]

compression is good across the board like 190.

 

I think I found my problem, number 1 spark plug was about halfway backed out and loose. Got them all tight and it runs fine, I think I still heard a tiny bit of detonation but Ill check timing soon.