Ok..I have an h22 in my civic.now would having no O2 sensor and just open headers not connected to the exhaust system could cause my car to barely even run,basically won't even go like 10 miles per hour and with the pedal to the floor???

 

There is not enough information here to accurately help diagnose the problem.

1. First off what is the problem in full?
2. When does it occour, did anything out of the ordinary happen before this started happening?
3. What is the year and model of the car and what year H22 and ECU do you have?

 

its a 95 jdm h22 in an eg coupe.its that it happened as soon as I turned it on n took a lil test drive but its not complete just because I needed my exhaust welded and had no o2 sensor and I wanted to know if the open headers and no o2 sensor would cause the car to barely run.and right now ill be using a stock p28 because sum dicks tried to steal my car at the shop n wasn't able to cus it didn't run..