Knocking and pinging at 3000 to 3500rpm

clean ur maf

Few things to try -

1. Mobil gas, they are generally ranked the highest in avg. rating. They are actually the highest on avg. and OVER the sticker rating more often than any other brand.

2. Check the harmonic bal. It is very common that the inner rubber ring will start working itself out (you can see it by looking at the HB). This is a cause of the outer ring spinning from the inner ring and if you checked/reset your timing it will be off...as the outer ring is not were it shoudl be.

3. Is your EGR hooked up and working properly? At mid load the EGR timing tables are in the 40+ range so if there is an error it will cause a ping.

4. Try cleaning the maf. A dirty maf has caused many a retarded headache and tail chaising adventure.

5. Remove the picture of Mr. Clarkson from your Av. the bad vibes are pissing off the mustang. I find him funny and love Top Gear but man do they just not get american style performance, I like and get the Euro idea of sports cars and handling...but I also realise its not the ONLY way to judge.