if it was me: 1.check spark plugs/base timing 2.check fuel pressure is ok (logged against boost) and AFR and timing aswell 3.replace injectors with flowed known set see how that goes.
Below is a copy one one of the runs. Dave cleaned up the line a bit and knocked out a few bumps with further runs, but ultimately wound the boost back a bit to keep it safe in the end. You can see where is started pinging towards the end of this run. Sorry didn't get any figures for injector duty or fuel pressure. Edit: I just noticed that's it's boosting well......hit 15psi at 3500rpm, and 10psi at 3000rpm.
Well if that's the case then it's not as bad as I thought. If I'm getting 200 and 220 is what is expected then the gap isn't major.
Agree you arent far off the mark. A good tune will do wonders. A good tune takes longer than a couple runs on a dyno what boost control do u have? Spike to 16 then drops off to 12? what is your exhaust setup? Cat condition?
Has a manual boost controller (turbotech). Exhaust is old aftermarket 2.5 inch system......unsure of condition of cats, is there a way to test?
Buggered cats shouldn't case pinging... If its pinging regardless of AFR and with timing taken out at the ECU it is sounding more and more like a cam timing issue
Just a question. Are u running one of those non genuine "replacement" afms? How was your afr? Running an aftermarket fuel pressure regulator?
No, just a stock AFM and FPR. I have a wide band sensor so will try to get a look at what it's doing. Problem is at 5000rpm and 14psi I'm not inclined to look at the gauge for too long. Thanks for all of your thoughts, it looks like my two targets are cams and cats.
Its just a matter of getting your plastic timing belt cover off and checking it's all lined up correctly. Also is it possible that you may have had a fair amout of meat taken of the deck of the block and the heads causing a raise in comp ratio and possibly leading to detonation/pinging??? Also a blocked up exhaust can cause det.
If you have Nistune can't you connect this up and then log it, along with lot's of other useful info, ie duty cycle?
Can also check with a timing wheel but yeah at the very least covers off and check the belt. Probably check base timing with a timing light first though. How does blocked exhaust cause pinging Matt? Higher combustion temps?
