Pinging At 4500rpm

[Whiplash]

my car has bad picked up a pinging when it goes past 4500RPM

I use BP ultimate in it, i have had it to a local workshop who had it all day and said it will have to go back when they can figure out what is causing it

They believe if anything it may be an aftermarket 02 sensor that isn't working with the standard ECU, anyone got any other ideas what may be happening as it started it out of the blue one day while driving to work.

[Konrad]

Have you replaced your fuel pump at all? maybe the stocko one is starting to fail, thus causing the engine to run lean and cause the pinging.

[Whiplash]

nah i haven't done anything to it yet. As far as i was concerned when i bought it, it was all stock standard except the HKS airfilter now i find out it has a aftermarket turbo dump and oxygen sensor. they checked all the mixtures and said that they were all correct

[MKDR33]

What boost are you running?

That might be able to help you out --> http://www.skylinesaustralia.com/forums/in...howtopic=119403

Edited May 27, 2006 by MKDR33

[Whiplash]

12psi got my spark plugs re gapped when it was in at the workshop. Will look at the coil packs this week

[Cubes]

What heat range plugs are you running?

If your up in the low to mid 200's you should start looking at 7's.

Spark plugs help remove heat from the combustion chamber, cooler plugs help prevent detonation.

[mad082]

could be a bad batch of fuel. try some good octane boost like nulon pro strength. if that solves it then wait and see if it still does it on the next tank of fuel. if it still does it then get it looked it, if it doesn't come back even after a few more tanks of fuel then it was just a bad batch. and make sure you don't put too much octane boost in as it can actually lower the octane.

mate of mine is a mechanic and he had the nulon rep come through work and he was asking him about the octane boost. the rep had an octane tester with him so they did some tests. at 50% strength it went by only about 2ron, at full strenght it went up by 6ron, and at double strength it dropped by 4ron.