Need some serious help. I just swapped a b20b into a 90' DA. Im having a problem with running way to rich. Once i start the car (when its cold) it will just run like total *** and die. After it warms up it will idle descent w/o dying. I attempted to turn down the fuel psi on my b&m regualtor but still wont run any leaner. I know for a fact that my plugs are fouled from running this rich, so that cant be helping me any. So i have come to the conclusion that my o2 sensor is toast, its so bad that its telling the ecu to run way rich cuase it thinks that its running lean. So i plan on replacing the o2 sensor, plugs and resetting the ECU so hopefully it will recognize that it shouldnt be dumping so much fuel.

This is a daily beater and i needs a ride y0. Any suggestions?

 

hmmm try checking your timing ,I had that happen to my car.....

 

Just wanted to say that anything under 3k will sputter and bog like crazy but after 3k its fine.

 

My buddy kinda has the same problem with his s2000. His CEL came up, took it to honda for diagnostic test, they said bad o2 on the cat was bad thats why it jerks back and forth from 4,000 below, after 4, its runs fine. He change the o2 on cat and still did the same thing, he then order another o2 for the header, car still runs like crap. Took it back to honda, they said its the o2 and the car is running to rich. He thinking bout getting a b&m fuel pressure or maybe a walboro fuel pump....will that help? If you get an answer let me know....

 

Well the wierd thing is im not throwing a CEL, but ive heard of people that they never threw a code for there o2 sensor when it went bad.

Any suggestions on what brand o2 sensor i should get? I dont feel like paying over 100 for an oem one. Bosch OE spec?