my car is str8 pipe....and when i was about to change the headers on it, i found out that the whole time it didnt have any O2 sensor at all....would this cause the car to run weird....because it always felt like it was runnin like ****

 

Yes..

No O2 sensor = check engine light on, HORRIBLE gas mileage, and the car to run like complete ***.

I'd get one asap if i were you

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itzyaboyzeem03 &raquo;</TD></TR><TR><TD CLASS="quote">my car is str8 pipe....and when i was about to change the headers on it, i found out that the whole time it didnt have any O2 sensor at all....would this cause the car to run weird....because it always felt like it was runnin like ****</TD></TR></TABLE>

W/o an O2 sensor, the car will run in open loop and make your car run rich, what is your current MPG?

 

try to find the harness plug for the original o2 sensor to see what they did with it, if its been simulated, etc.

 

does anyone know if the obd0 spoon pr3/pw0 ECU's use the o2 sensors or if they are disabled? Thanks!