A car I am looking at has a B20B in it. It is a 91 Integra RS...

Are you suposed to leave the stock ECU in? Cuz he did and i am wondering if there are problems since the ECU in there is for a 1.8L engine with different compression than the 2L engine thats in there now running off the same ECU.

Thank

 

It is also throwing a code 43 (fuel system) code abouve 70MPH, could this be also related like it needs a bigger fuel pump, and fuel lines??

 

anyone?

 

the 2.0 liter is primarily a 1.8 just with a longer stroke.

you can probably get away with the stock ecu, but it always find it more useful to go with the ecu that the motor uses from the factory.

you shouldn't need a new fuel pump or anything with a b20b swap.

Any CEL would have to do with faulty install.

Hope I helped.

 

The CEL was happening before the swap, so he says, but he said everyone he asked about it told him it was the O2 sensor, does it sound like a O2 sensor to you?

 

I would presume if there was an issue with an 02 sensor you'd throw a code for the o2.

I could be wrong.

 

hmmmm...what would you suspect would throw a fuel system code then?? sine theres seperate codes for the injectors and stuff...its not those, i cant figure out what it could be, and i wanna figure it out before i buy it lol

thanks