big problem yesterday i was in the freeway racing a bike i was on 25 pounds on 103 octane all the sudden my car just turns off and i get off the freeway and try to start the car but it doesnt start. after i let it cool down and check my plugs the car starts perfect like if nothing happens so i lower the boost and change the safc to 91 octane map and drive the car for like a week with no problem until last night it did it again but this time on 21 pounds. one of the sparkplugs number 4 the gap was closed all the way and car was knocking hard and something broke cause its spinning inside the turbo changed the plugs and its still knocking hard and shaking. the weird thing is i changed the gas changed coils and plugs now car doesnt knock at all motor seems fine i did a compresion test and it was good 150,151,150,150 but car doesnt run good exaust sounds like a wrx and stubbles when u boost...

 

Shouldn't the compression should be 180 in each cylinder?

 

The numbers seem a little low, I usually get around 178 across the board. I've noticed others getting lower numbers around here so I assume it's just differences in the gauges. Either way, they're all pretty much equal so it should be fine.


So what was in the turbo?

 

couldnt find out it spit it out the exaust

 

Do you have any check engine codes stored in your ecu. I would check to see if your crank and cam sensor signals are reading correctly.

 

there is sooo much inconsistency with cheap compression guages, that you can never really get an acurate reading. as long as the numbers in all the cylinders read about the same, your good

 

yeah it showed some codes but i took it to the dealership and they said it was my o2 sensor by the turbo but now i can boost but car feels slower and the tone of the exaust is different. But i never found out what was in the turbo something had to break but i dont know what..

 

It might be worthwhile then to pull off the intake and check the compressor wheel, and then remove the O2 housing and check the turbine wheel. If something did actually go through the turbo, the turbine is probably damaged.

 

If any damage was done to the turbo it would have been done on the hotside of the turbo. When I droped a valve in my GSX at 8krpm my FP 3065 chewed the valve up and spit it out did some nice damage to the exhuast side of the turbo. Intake side look perfect so did the exhuast side of the blade but once I took the turbo apart I found the real damge.

 

What part of Cali do you live in? I work at Riverside Mitsubishi as a service writer if your close enough I might be able to help you with your prolem.

 

perfect man i live by lax airport but i wouldnt mind driving to u give me your number