Oh-Oh's, I Think I Broke It!

[carbonBLUE]

Originally Posted by pcasso87

Ok guys well according to a toyota tech one of my pistons has a huge hole, my ecu could also be faulty which could have caused the engine to fail. I will have more information today or tomorrow. This is extremely weird, i really cant explain it my self. Hopefully the tech will diagnose it better so we can have a better idea as to what failed.

Maybe a faulty knock sensor, and you have had slight detonation that you couldn't hear slowly destroying that piston

[whtchocla7e]

Originally Posted by pcasso87

my ecu could also be faulty

ecu or tune?

did you tell them about the tune?

[D1cker]

Originally Posted by pcasso87

Ok guys well according to a toyota tech one of my pistons has a huge hole, my ecu could also be faulty which could have caused the engine to fail. I will have more information today or tomorrow. This is extremely weird, i really cant explain it my self. Hopefully the tech will diagnose it better so we can have a better idea as to what failed.

Sounds like the tune was making it run lean?

[markitect]

Sorry to hear. I assume they will replace the entire engine, but just the same can you see if you can get a picture?

[Chimpo]

Tune on the car since Nov, but you mentioned you were testing it in the beginning. Have any data logs? I would assume you saw something in the logs it would have caught your attention?

[victorb]

Thats totally bad news! Ensure and verify what he said via another tech. That's weird for a new engine

[Rayme]

Originally Posted by carbonBLUE

Maybe a faulty knock sensor, and you have had slight detonation that you couldn't hear slowly destroying that piston

Sounds like the OP ran the car hard despite the ecu spitting misfire CEL and blew it up. Warnings were there but...

Good luck!

[Dave-ROR]

Originally Posted by ottopilot

Sounds like the OP ran the car hard despite the ecu spitting misfire CEL and blew it up. Warnings were there but...

Good luck!

I don't think he drove it hard after the CELs? I missed that part if he did. He trailers it to events so he didn't even drive it home.

[Rayme]

Originally Posted by Dave-ROR

I don't think he drove it hard after the CELs? I missed that part if he did. He trailers it to events so he didn't even drive it home.

It's right on his first post, I imaging "session" are normal track timed event when he's running the car hard? Despite CEL's and smoke he still did laps?

[Dave-ROR]

Originally Posted by ottopilot

It's right on his first post, I imaging "session" are normal track timed event when he's running the car hard? Despite CEL's and smoke he still did laps?

The CEL flashed, the codes didn't come on until the end, at which point he stopped driving it. I commend him for even noticing the flashes, most people don't pay attention to their gauges except for a few spots on the track (straights to get temps, fuel, etc).

I've had CEL's come on during track use too, so have others. If it just flashed for me I'd be curious but if it went back off right away I'd keep driving too. Heck if the light doesn't stay on you can't read the code with a normal reader IIRC on these (Honda's you def can't) so what else would you do?

Once the CEL lit and stayed on he stopped driving.

I had CEL's this last sunday too, coil park related (351). Need to stop by Subaru to see if there's anything else but they went away by themselves so far. :shrug:

[King Tut]

Originally Posted by pcasso87

Ok guys well according to a toyota tech one of my pistons has a huge hole, my ecu could also be faulty which could have caused the engine to fail. I will have more information today or tomorrow. This is extremely weird, i really cant explain it my self. Hopefully the tech will diagnose it better so we can have a better idea as to what failed.

I would like to know what he did to diagnose a "huge hole" in your piston? Did he pull the plugs and scope your cylinders.

[track_warrior]

Originally Posted by whtchocla7e

ecu or tune?

did you tell them about the tune?

Apparently my ecu could be faulty not a tune. I know they have replaced a couple of them under warranty for random cel's and misfires. I should have more info today or tomorrow. I also know for a fact confirmed by two people is that toyota & subaru HQ have been randomly checking fuel samples on random cars that come in for service, dont know why though. Im sure toyota will get to the bottom of it since they are very knowledgeable.

Originally Posted by D1cker

Sounds like the tune was making it run lean?

Dont have a way to log or a gauge for now but that my next investment. I filled her up with 93 v-power and the car is set up to run on 93 so i dont see this being a problem.

Originally Posted by markitect

Sorry to hear. I assume they will replace the entire engine, but just the same can you see if you can get a picture?

Ill try to get the service manager to snap some pics when they pull the engine out, for now all is speculation from initial diagnosis from a tech.

Originally Posted by ottopilot

Sounds like the OP ran the car hard despite the ecu spitting misfire CEL and blew it up. Warnings were there but...

Good luck!

The cel flashed and went away, i scanned and got no codes. When they stayed on i parked the car and put it on a trailer and towed it. I would have never kept driving if the cel's stayed on.

Originally Posted by Dave-ROR

I don't think he drove it hard after the CELs? I missed that part if he did. He trailers it to events so he didn't even drive it home.

Correct, i coasted and stopped driving after the cel stayed on, pulled over and got a quick video of the engine noise and dash lights then shut the car off and pulled codes.

Originally Posted by ottopilot

It's right on his first post, I imaging "session" are normal track timed event when he's running the car hard? Despite CEL's and smoke he still did laps?

Drivers school set up by h2r. Cel's did not stay on, and smoke could have been exhaust gasses trapped inside the exhaust that is why i did not pay attention to them since the car was not struggling to idle or giving me codes i only noticed a puff of smoke when turning on the car not while idling or under wot.

Originally Posted by King Tut

I would like to know what he did to diagnose a "huge hole" in your piston? Did he pull the plugs and scope your cylinders.

Really i have no info this is what i have been told so far, ill have to wait for more details from them, but apparently this is the problem.

[Visconti]

SUB'D

[mad_sb]

Probably did a quick compression test.. bent or damaged valve will also show low / no compression... I would bet on that over a hole in the piston.. Pre Ignition is what causes holes not detonation, detonation causes cracks and missing chunks. I have read though that DI is prone to carbon buildup which can lead to pre ignition if there is enough of it..