4.6L (1996-2004 Modular) MustangTechnical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within. Sponsored by Cruizin Concepts
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Some of you do not know...but I blew my engine in my 99 GT about a month ago. I just now tore down my factory engine. Piston #7 has a nice chunk missing out of it. About half the cylinders were full of coolant when I pulled the heads. I still haven't determined what caused the piston to burn. The burn is underneath the intake valve which is strange as well. I wasn't spraying at the time the engine popped and what few times I have sprayed I was only running a 100shot with 93 octane.
I will be getting rid of some good parts soon...If you name it, I have probably got it.
Good PI heads, sensors, etc.
i would have to say that your tuning was off....and maybe on a previous day when you where spraying you backfired and thats why your intake valve is burned and the piston mighteve gotten fatigued and when you punched it the last time....it just gave out at the stress point.
please go forged be4 you spray...and make sure the car's timing is right when the nos is going.or you'll be having piston pieces for breakfast again and again.
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