Ok i have had 3 ls's including the one in car now and 2 have always had a 7250 (or there about) rev limit. The one i have now is only 6500ish. So my question is there a diff in ls obd1 P75's?

 

You can see the program number written on the large 66207 processor chip.

 

Haha ^^^ i have no idea what tou just said. I am guessing there is some numbers on a chip inside. However i never dealt with what oem chips are what. I just run oem ecu unless otherwise needed and i leave to professionals

 

It's the largest one. This is all assuming the ECUs are stock and not chipped with a custom program.

 

^^^ yea it is stock. So i am looking fir a number on top of the biggest oem chip. Were do find info from there or just report back here?

 

You were asking if they're different. Those two things will tell you. You're welcome to try to locate those binary programs on PGMFI.org and open them up in freeware for further processing, but I can't help you with that.

 

^^ i only have 1 ls ecu in hand ( the one with rev limit if 6500) i was simply asking if there was a diff in ls p75 ecu, and gives diff rev limiter. Such as rs teg having diff rev limit than a ls or se teg. Thats all i am really wondering. I mention other ls's i owned cause they did not have early 6500 rpm limit

 

any of them auto ecu's?

 

^^^ dont think so. What is secondary code for obd1 auto p75?

 

prabably automatic... What are the last 3 characters of the part number?

 

ecu code on side of ecu from what ive seen
38720-P75-xxx, what are these xxx numbers?