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Old 02-27-2007, 08:25 AM   #1
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Default difference between p28 computers?

ive tried searching and get nothing. i just want to know what is the difference between a p28 (ao2) and the p28 (a56). and which would be better to run on my LS.
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Old 02-27-2007, 08:37 AM   #2
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Default Re: difference between p28 computers? (JDMstatus95)

none of them would be good to run on your LS! LS= NON VTEC....the p28 is a SOHC VTEC ecu but can be chipped to run DOHC VTEC motors. The 37820-p28-A02 (or A00, A01, G00, G01, C00, C01, L00, L01, etc) is a 5 speed ecu. The letters ending in A56 or A52, etc. means its an automatic ecu.
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Old 02-27-2007, 11:57 AM   #3
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Default Re: difference between p28 computers? (iH8RICERZ)

thanx for clearing that up for me but my coupe came with that computer in the car, p28(ao2). it runs fine, but could that be the reason the check engine light is on. i am a noob so if u could tell me the correct and best computer to run on my LS
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Old 02-27-2007, 12:29 PM   #4
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Default Re: difference between p28 computers? (JDMstatus95)

what year is your LS? The p28 is the wrong ecu for your car...so I wouldn't recommend driving with it, unless its chipped and you have an LSVTEC or something. The stock ecu for the LS is a p75. There are a few different ecu's for different years.

Integra LS
1988-91: obd 0 pr4
1992-1993: obd 1 pr4
1994-1995: obd 1 p75
1996-1999: obd 2A p75
2000-2001: obd 2B p75
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Old 02-27-2007, 07:22 PM   #5
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Default

and what could happen if i drive with this ecu until i can get a p75 i guess
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Old 02-27-2007, 07:35 PM   #6
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Default

the stock basemap would be wrong, so timing and fuel would be wrong.
I assume that it could possibly blow your engine, but I could be 100% completely wrong.. but it does make sense.
Order one ASAP.,
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Old 03-02-2007, 10:24 PM   #7
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Default Re: difference between p28 computers? (iH8RICERZ)

what year is your LS? The p28 is the wrong ecu for your car...so I wouldn't recommend driving with it, unless its chipped and you have an LSVTEC or something. The stock ecu for the LS is a p75. There are a few different ecu's for different years.
Integra LS
1988-91: obd 0 pr4
1992-1993: obd 1 pr4
1994-1995: obd 1 p75
1996-1999: obd 2A p75
2000-2001: obd 2B p75

its a 95 civic coupe and a 98 b18b1
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