i have 94 ls motor in my 92 dx hatch
i have been using the stock ls p75 ecu but im starting 2 see problems after a 8 months ago after electronics teacher installed skunk 2 chip off ebay that fucked somthin up: lemp home mode at 3000rpm an ac stayed on

i got the chip removed a day later an i had 2 put a switch on my ac and since then ive never payed much attention til after the swap from my totaled 94 ls to 92 dx hatch and i upgraded 2 a 2.5in full exhaust- it back fires when i change gears an when im take my foot off the gas around 5grand
it did this in my teg after the chip was put in aswell i just notice it more n the hatch cause of different exhaust

i heard stock ls ecu goes 2 bout 7000-7200rpm an my untuned safcII says 6900 at the red line


im tryin 2 get a new ecu an i know p28 is vtec but i can still use it just wit a check engine light
will it really hirt anything on the motor an what is the redline on p28

 

Not only is the P28 a VTEC ECU (which will throw two codes), the fuel and ignition maps aren't correct for an LS motor and will cause it to run like utter ****.

Regarding the LS redline, stock Integra tachs are usually inaccurate and read a few hundred rpm's on the high side. Stock redline is closer to 6900.

 

As I replied in the "tech" area.
You can chip a obd1 p28 ecu with a non-vtec p75 program, then if you ever decide to go vtec, all you need to do is drop in a vtec programmed eprom chip

 

yo i am loscated in the beach if you need a p75 i have one give me a hit and its yours also have a pr4 if anyone needs it