PLEASE HELP ME.....My car is running like crap. The drivers side 4 cylinders are running VERY VERY VERY rich....This has happened two times before. I replace the oxygen sensor and the four plugs and it then runs fine for a couple months. I am running AC Delco platinum plugs and on a few of them, the platinum is gone. I hooked it up to a scan tool and the driver side is pumping out about 3 times as much gas as the passenger side cylinders. Does anybody have any suggestions? I can't afford the 90 miles to a tank of gas anymore. PLEASE HELP ME!!!

 

Check your injectors. Sounds like you've got one or two messed up on the one bank.

 

I checked the Ohm's on all the injectors and they are relatively close. The values are 12.9-14.3 ohms. Another thing....the car runs fine when it is cold before the oxygen sensors start to work....Open loop or closed loop I get them mixed up....When it is warm, it's when it runs like crap.....Please help!

 

crazy!!!! I am having the same exact problem!!!! good luck though because i havent found an answer yet!!! mine is the same side and everything!!! mine doesnt want to run once it gets warmed up(like yours)and it feels like it has about half the power it used too!! Feels like it loads up like a carb car once it gets warmed up. Is your car throwing any codes? Mine has low cat eff. bank 1 and secondary air but those were on before. Also does your car want to idle really low after you drive it? Let me know because it sounds like we are both chasing the same problem!

 

It threw a code the other day but I haven't had time to check it with a scan tool. Mine also idles really low too after it is warm. I sounds like it is havin a hard time staying on. Also, if I am driving down the high way, I can punch it and it hardly has power and stumbles and coughes, but when I let off then hit it wide open again, it seems that it is almost running fine while it's wide open.....Someone pleeeease help...........

 

TTT

 

Have you checked to see if the MAF is dirty? Could be a possibility.

 

You may have an exhause leak, which will suck in air and cause the O2 sensor to read lean thus adding fuel. Or an injector could be dying, which could also cause the O2's to read more air (since the dead cylinder puts out more air) and could be compensating by adding fuel.