i have a 94 ls teg that i just did a b20b swap in and im running a pr4 ecu right now. ive read that the ls ecu runs lean on the b20? would it be ok to run the pr4 or should i get a b20b ecu? thanks

 

anybody?

 

Use a P75

 

i have p28 chipped for ls. runs great

 

ok. i just wanted to get some other opinions. idk if it would be safe to run on the pr4 or should i just get a chip for my socketed ecu?

 

Why would a LS Ecu cause a B20 to run lean? Its a LS with a bigger bore, thats it. Same head, same rods, same crank. I used a PR4 on my B20 CRX and had 0 issues untuned.

 

I'm having the to ask the same question, glad I found this thread. I have a 90 integra LS swapped to a B20B JDM never passed emissions (ya'll know what I did LOL) But recently it started acting up not wanting to start, hunting idle, shutting off when given gas etc. So someone suggested that I put the ecu that the motor originally goes with in, but thats a CR-V ecu. Now I think I'm missing something. Any advice would be much appreciated.

 

I used a socketed pr4 with a phearable.net basemap!! Good guys to deal with!

 

i remember first time i used phearable.net i ruined my ecu tryint to do it my self. ive had no problems running ls ecus on the b20s we swap here

 

ok well i have a wideband so im gonna watch it close, i just got my crank and everthing back from the machine shop, so its going togather tonite. thanks for the help

 

i got a stock b20 too and i use the p75 and its swelll!! red lines at like 72k
rpm

 

i have a 96 b20b on my 92 gsr, im running the oem gsr ecu and it runs like dookie, anyone know if it would be ok to run any obd1 pr4 ecu?

and also, when i start up the car when its cold, it putters like hell and wont go up higher than 1.5k, i press on the gas and wants to shut off, would it be caused by the ecu or the iacv?