HotSilverBird

The computer should have seen the detonation and backed everything down.......but your tuner most likely desensitized the knock tables.......like i said the factory tune is a much safer tune.

Denali08

Yes pump gas.

King Nothing

iTrader: (9)

check the fuel pump and maybe a new tuner

Denali08

As said 255lph fuel pump will go in and will be retuned after the rebuild.

I will try to post the tune file.

RENE'S RAGE

iTrader: (96)

X2. Timing to high, AFR to lean.

Mart00SS

iTrader: (19)

This is the BEST post in this thread so far, and what I would imagine happened. I would lean towards a fuel pump. But if you had logged data of when this happened that would tell you everything, maybe think about getting a wideband so you can monitor your AFR to prevent this in the future.

HotSilverBird

I think a sign on the dash sayng ATTENTION when you hear sounds like pistons are about to break into little pieces.......LET OFF THE THROTTLE MORON!!!

This thread is the reason i loan nothing and if the car goes to a shop or dealer NO DRIVES without me...not even a short test(beat the crap outta yer car) drive.

Denali08

Checked the heads and found two bent valves on cylinder# 7!

5.3LJimmy

iTrader: (10)

Yeap.... That would be from the piston particles crossing over from cylinder to cylinder.

OneBad98Z

iTrader: (1)

did it have enough top ring end gap??? kinda looks like the rings butted ends and locked in the bore taking the ring land with it? was this a fresh motor?

OneBad98Z

iTrader: (1)

nevermind i see it was together for 6 months, might rule out the ring issue unless the engine got hotter than usual, but its hard to believe a n/a motor with forged pistons would see enough detonation to kill pistons like that without you noticing something long before this result.

02 BLK WS6

iTrader: (11)

Your friend ran it into the dirt. I bet it was pinging like hell before the plugs and pistons went.

Chris05ssTruck

iTrader: (9)

^^It had to be.
But like said, fuel pump, injector, a **** ton of trash in the fuel system, tune something is up.
Be sure to go over EVERYthing before you get it running and something like this happens again.

Denali08

Tried to pull the tune using my HP Tuners. Engine is already out. Connected the battery and pulled the fuse for fuel pump to prevent fuel going out.

HP could not detect VCM! "Unable to locate VCM".Anyone know what is the issue?

Asked my tuner to e-mail me the file but it will be EFi live file. It was tuned with MAF, so, guess it is not the issue why VCM not recongnized by HP Tuners.

LS1Adam84

iTrader: (21)

Looks like a friends turbo car in one cylinder, detonation, or extreme lean condition causing it to heat up and melt the pistons and spark plugs, when we got my friends engine apart the piston in his had a very nice sized hole through the side of the piston, looked pretty cool, but shitty at the same time.

I agree with those who say detonation though, check those injectors, I say the pump to just to be sure but if the pump was bad it would be happening to the passenger side as the main fuel line comes to the driver side, even under pressure it would still not have gotten starved for fuel. I could be wrong though.

jkkaz

I've seem a similar failure on a supercharged engine before. Cylinder temps got to high and ring ends butt and take out the piston. The fix was simply to run a slightly bigger ring gap, but that was near 20lbs of boost. I'm curious what your end gaps were set at.

kmracer

iTrader: (1)

no. that'd cause a scuffed cyl, not damage like this.

i'd agree with detonation. lots of variables though. but DAMN. im guessing you were at WOT when this happened?

orangeapeel

iTrader: (18)

His "friend" was at WOT apparently. I don't think we are hearing the full story.