me and my buddy were on the interstate tonight and around 120 mph and 6500 rpm roughly the car went boom a big flame shot out of the exhaust then the car stalled i tapped the gas and all you could here was supercharger so i pull off the side of the road and wait a few minutes and start the car again and it is running fine i didnt do any hard pulls but i did hit full boost does anyone have any idea what happened? did i detonate? maybe a bad plug/coilpack? a little bit of info would be great thanks

 

Have you looked in the motor, checked your plugs? If its running fine, then I would *think* that there isnt permanent damage, although a big flame out the back is kind of

Check your plugs, see if they have anything on them they arent supposed to. My guess is that your cat will be fried, and maybe some o2 sensors as well at the very least.

 

there was no codes thrown which i thought was odd but the car is running ok today and i dont know if this is normal or not but the oil smelled something fierce of gas im just hoping this things not gonna die on me soon

 

did you look at plugs?

 

Why were you going that fast on the interestate anyway dude.. fucken stupid.. Serves you right for doing that. But Good fortune on your sit-e-ation =]

 

thanks dad

yeah i looked at em they were black around the bottom and the progs looked burnt as **** so i replaced them and now my car is sucking really bad it sound like only the supercharger is turning and **** idunno it has no power im fucked

 

your oil smelled of gas???

 

i think the sound you heard is probably self explanitory.. going boom boom boom is never good lol

 

QFT

im guessing...sometihing really bad lol, like maybe rings blow???? hole in piston??? something as such

 

well it ran ok till tonight and it seriously just **** the bed the car sounded like it had a constant blow off valve going had no power all you could here was charger im thinking its something blown not sure what but im pretty sure it is not good no cel's though how should i go about diagnosing this im lost when it comes to major problems and yes the oil smells of gas something fierce

 

i would start by doing a compression test, that shows ok then you have compression in the cyl which should mean you have good valve seel and such, if it is still compressing just not enough do a wet compression to see if its the rings...if that fixes it then piston ring problem. if that doesnt fix it then would start by pulling the valve cover, check the tops of the valves, then pull the intake mani and check what you can see through the ports, same witht he exhaust. if all seems goodincluding supercharger then pull the head...

thats how i would proceed.. and good luck, keep us updated

 

another one bites the dust...

 

thanks alot man i appreciate the advice im gonna start doing that stuff today im expecting the worst but kinda hoping for the best ill definetly keep you guys updated thats for sure

 

aaaand....yer done.

do a compression test, starting with #4. I'm guessing the exhaust note sounds something like a WRX

 

at first i was thinking you blew out your cat bc that happend to me a while back i was doing a 2nd gear pull and it made loud bang and stalled and threw alot of black smoke. i checked under the hood and all was normal, it started and ran fine i threw an 02 sensore code a week later and well my cat was gone haha.
that was a year ago and shes still running fine, your problem seems alot more serious goodluck getting it fixed

 

yupp

 

let us know if you need any help with anythign also...ive had to do most of these tests recently when i miss timed the car and bent all my exhaust valves

 

Blown ringland

 

update

compression test turned out normal so thats good news
went and bought new plugs 1 step cooler gapped them to .035
still didnt fix the problem so i decided to take the d/p off and when i did this huge ceramic/metal metal hunk of cat fell out so needless to say it was the cat all along .... so i pounded out the cat with a huge bar and blew it out with the compressor and i think she is gonna be just fine........for now.......

thanks everyone for your help

 

there you go

good job!!!!!!

 

thanks

 

Just as an fyi your going to toss a cel, it will be p0420. Whoever did your tuning can block it from popping on.

edit: Also something to consider buying later on down the road would be an egt gauge and or an interceptor.

 

wow, I guessed something right

Glad you found the problem, time to upgrade that downpipe!

 

i think they 120mph at 6500rpm might have done it...

 

i already got that code deleted a while ago and i would love to have an intercepter im just way way to cheap

hahah idunno maybe might have had something to do with that and the huge fire ball that lit up like a mushroom cloud haha