2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Cannot figure out the problem.

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Old Sep 25, 2008 | 06:10 PM
  #1  
Tatakai's Avatar
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Cannot figure out the problem.

OSAKA JDM MOTORS sent me an jdm S5 motor for a buddies S4 (sent wrong motor) his chassis is originally an n/a but it had a turbo motor running just fine before it blew. Changed all of the sensors and front cover and ish, put the motor in, it ran just fine for a while. All new plugs and ish. He finally left to drive it home, gets 5 minutes away and it catches on fire. Minor fire, but we bring it back.

So basically we found no reason for the fire except maybe some residual oil on the turbo, but now we've had all kinds of problems. We never got on it before so we're not sure if it already had the problem.

The motor will not rev past 5500 rpm, it feels like your topping out 5th gear, it just wont go any higher. It also does not boost more than 3lbs.

We've tried everything. Checked voltages for every ecu pin, every sensor, changed plugs, bps, ecu, fuel injectors, fuel pump, fuel filter; EVERYTHING WE CAN THINK OF. I just did a compression test, and we're not sure if we did it correctly but it seems to be reading about 45-50psi on both rotors. All we did was take a plug out, pulled egi fuse, and cranked it until the needle stopped going up. Steady pumps, never lost compression.

any help appreciated!!
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Old Sep 25, 2008 | 06:13 PM
  #2  
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Sounds like the motor is toast.
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Old Sep 25, 2008 | 06:22 PM
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i had a bad feeling about it when we complained they sent us an s5 instead of an s4, and they wanted us to pay for shipping the motor back and the new motor to us.
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Old Sep 25, 2008 | 06:43 PM
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you should hope the compression test was wrong.
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Old Sep 25, 2008 | 07:17 PM
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https://www.rx7club.com/showthread.p...AKA+JDM+MOTORS
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Old Sep 25, 2008 | 07:18 PM
  #6  
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https://www.rx7club.com/showthread.p...ighlight=osaka
https://www.rx7club.com/showthread.p...light=osakajdm
https://www.rx7club.com/showthread.p...ighlight=osaka
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Old Sep 25, 2008 | 07:23 PM
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damn man, i feel so bad for the guy.. his dad bought the motor and wanted to go cheap as possible.
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Old Sep 25, 2008 | 07:33 PM
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The cheap pay twice.
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