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Originally Posted by Queppa
Hey what up,
Ive got an r33 gts-t rb25det skyline with a front mount intercooler and 3 inch mandrel bent exhaust that pings then pops straight after at around 4500 then again around 5500 when your into it.
you here it pinging right before it pops and the whole car jolts when it pops.
We checked the fuel pressure while running it and it seemed to detonate when the fuel pressure dropped below 45.
se we clamped the return line to up the pressure to stop it dropping below 48 which stopped the popping but it was still pinging.
its got 87000 on it with new plugs k&N pod an new fuel filter.
interesting that with the air con on it makes the problem even worse.
fuel is vortex. no difference with octane boost either
Any Ideas.
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Stupid question but what does 'pinging' actually sound like ? You hear it from the engine ?
Eric.