now i understand that i have an obd1 b18b, now im reading a post post wich states the theres two ecu's for that motor those being the p74 and the p75 now does it matter which one i get?

 

anyone?

 

also how do i go about removing a snapped bolt on mount?

 

anyone?

 

p75 ECU is for the obd2b motor. You wont be able to run that one.

Stripped bolt? Drill it out.

 

so p74 is the one im looking for?

 

thats not completely correct the p75 for the LS came in both OBD 2 and OBD 1 and if your can is an 94-95 LS your looking for P75 obd 1 and 96-01 its also but P75 obd 2. i can get more in detail about it but i think that all u needed to know.

 

so the p75 is only for the 94-95 LS, so i need to get the p74 then?

 

you need to find an obd1 p75 ECU

 

i got the motor from a '91 DA so will i have to run the p74?

 

If we really get down to it, the correct ECU for that motor would be a PR4.

You can try to find an OBD1 P75 from a 92-95 LS, or even a p28 vtec ecu would work.

My friend has seen significant gains in his 2000 obd1 converted LS with a p28 and basemap

 

can anyone else confirm that the p28 would work on a LS, seeing as how the p28 is a vtec ecu.

 

o...and just to be specific, if it came out of a 1991 LS, it would be a b18a1, as opposed to a b18b1.

And yes a p28 would work in an LS. My friend has had it for awhile, and has been running it with no problems since he bought it. He's getting ready to put on a b16 head, so thats why he originally got the p28. It has been powering his stock ls motor for more than a year, and runs great.

 

thats what i thought but im guessing they swapped out the A1 and put it in a B1

 

you should be ok with either a pr4, obd1 p75 or a p28. either will get the car up and running.

 

if i end up suing the pr4 i will need a jumper harness correct obd0 to obd1?

 

another thing i forgot to mention about this B1 is that it came with cable tranny, i thought LS came with hydro transmissions.

 

OK if u got the motor from 91 DA u have a B18A1 motor and not a B1 let me break it down to u. integra DA are 90- 93LS and they come with a B18A1... and integra DC4 are LS come with a B18B1 and the integra GSR aka DC2 come with a B18C1. and type r aka DC5 come with a B18C5... so hope that help u.

 

ITR is a dc2. RSX is DC5. And OP said the motor is a b1 for sure, even though it came from a DA he says it was swapped...
Depending on the year of the b1, it could be obd1 or 2.

 

Anything that has a basemap and is tuned will run bette.r get the P28 if you have plans later. If not a Pr4 or P75 will work fine.

 

ok and now about this ecu if u still have a B18A1 the correct one is a PR4. but if u have a B18B1 its the p75 but like u other guy said u can used the other one too... and u are getting me confused on what car u have and what engine u have... but im guess u have a integra 91 with a b18b1 swap.... am i right???

 

yeah your right. and u should be able to tell that on by the head block. its 96 or up he need an OBD 2 p75. so u need to find that out first..

 

http://www.hondashowoff.com/forums/s...ad.php?t=12365

http://i664.photobucket.com/albums/v...arstamp001.jpg
http://i664.photobucket.com/albums/v...arstamp002.jpg
http://i664.photobucket.com/albums/v...arstamp003.jpg

hope that helps

 

look here for some truth to what you want to know. some misinformation in this thread.

http://www.hondata.com/techecuid.html

 

Good call on the link. The stock ecu that came from my 2000 LS(B18B1) was a P75 OBD2, I'm selling the ecu if you need that specific one.