05-21-2010, 03:19 PM
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#41 |
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3" Exhaust
Join Date: Mar 2010
Location: georgia
Posts: 59
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To start with I did a pressure test and found that the head gasket was blown then did a compression test and found that all the cylinders were down. After we pulled the head it was obvious you could see the four marks in the cylinder made from the piston skirt had been walking up and down the cylinder. The machine shop said it had to be bored. Here it is the whole story.
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05-21-2010, 04:19 PM
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#42 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
Sorry to say I'm still a bit confused though. In post 33 you said it's already running after the rebuild...with no codes, in post 31 you say the cam sensor was broken in two pieces, and in post 35 you say you haven't fixed the cam sensor yet. How could it be running with no codes if you haven't fixed the broken cam sensor yet? Oh, and the engine damage you describe is only caused by one thing - running too much boost with not enough octane. Someone was obviously trying to crank the boost up using pump gas. Your aftermarket parts aren't going to handle detonation any better than the oem components - so if you want the rebuild to last, be sure to run high boost only on high octane race fuel. If you follow this rule, the oem 2jz-gte components (yes, bone-stock) can reliably handle over 1000hp (with aftermarket turbo, injectors, and cams of course). The limit on 93 octane ((r+m)/2) pump gas and the oem ecu is about 14psi with the oem twins, and maybe 16psi or so with the oem ecu and a big single turbo. To cause the damage you describe, I'd guess someone was trying to run in excess of 22psi on pump gas.
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. Last edited by pwpanas; 05-21-2010 at 04:22 PM. |
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05-21-2010, 05:58 PM
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#43 |
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3" Exhaust
Join Date: Mar 2010
Location: georgia
Posts: 59
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Sorry for the confusion we haven't fixed any sensor and yes the check engine light did go off even with a broken cam sensor. I can't say forsure what the boost levels where but its safe to say you are most likely right. But this is why I came to this forum to seek out the right answers
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05-21-2010, 10:28 PM
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#44 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
Good luck - hopefully things start falling into place after all of your hard work!
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. |
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07-01-2010, 08:27 PM
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#45 |
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3" Exhaust
Join Date: Mar 2010
Location: georgia
Posts: 59
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heres a update the motor is back in the car we ended up going with cp pistons, eagle rods, balanced the whole thing but left the head stock after running out of money the car should be running this weekend so i'll be reportin ghow it does and if we fixed the problem.
side note most of the sensors were replace knock, cramk trigger, cam sensors, etc.. |
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07-04-2010, 09:27 PM
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#46 |
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3" Exhaust
Join Date: Mar 2010
Location: georgia
Posts: 59
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IT LIVES!! we fired her up friday and no check engine idles smooth i've only drove it up the block but it seems to be doing well so i cant tell you what the problem was the car did have a wore out motor but that wasnt causing it to run like crap.. thanks for all of your help paw
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07-06-2010, 01:08 AM
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#47 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
Congratulations! ...and thank you for keeping us up to date on your progress.
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. |
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07-06-2010, 07:03 PM
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#48 | |
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3" Exhaust
Join Date: Mar 2010
Location: georgia
Posts: 59
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Quote:
agreed it was one of those sensors that caused this whole mess, so for those that read this thread the car had a wore out motor but that was'nt the cause of it's problems we replaced all but on esensor on the motor which was the front cam sensor, sorry to say i can't tell anyone what was the real problem with the car. thanks to pwp for all of his help.i'll post up some eye candy. |
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07-07-2010, 06:30 PM
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#49 |
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3" Exhaust
Join Date: Mar 2010
Location: georgia
Posts: 59
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heres some photos of the build
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07-07-2010, 06:33 PM
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#50 |
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3" Exhaust
Join Date: Mar 2010
Location: georgia
Posts: 59
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heres some more
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