P75 or PR4 ECU???

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03-29-2009, 07:01 PM

InTheLBC20

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P75 or PR4 ECU???

Is there any difference between these two ECUs, fuel map, redline, etc...I have a p75 in my LS swapped civic (B18B1) and just obtained a pr4. As far as I know the p75 is from 1994-1995 tegs and pr4 is from 1996-200?. I just wanted to know which one's better or if they're both the same.

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03-29-2009, 07:06 PM

Ls_dx

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Re: P75 or PR4 ECU???

They are both the same. LS non vtec ecus. what year is the car ?? id say just roll with what you have ...

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03-29-2009, 07:23 PM

InTheLBC20

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Re: P75 or PR4 ECU???

my cars a 95 the engines out of a 94

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03-29-2009, 07:36 PM

CivicSpoon

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Re: P75 or PR4 ECU???

Use the P75. There's no reason to put an ecu that is a different OBD than your car, you'd need to buy a conversion harness to plug the other one in anyways.