98 GT Pig Rich Drivers Side Lean Passenger ??

[WhiteStang]

Have a 98 GT 4.6L running like crap, all the plugs on drivers side are rich & passenger side is normal to lean. New plugs & wires, coil are fine. O/R X-Pipe & brand new O2 sensors. Any ideas what can cause one entire bank to be totally opposite of the other. No codes reading any sensors bad?

 

[chuck943]

cam timing

 

[urban96]

o2 sensor

 

[WhiteStang]

Yep, I tried O2 sensor, still did the same thing, but forgot that previous fuel trims are stored in computer memory, once I reset computer it took to the new sensors. Did some driveablility monitoring, fuel trims keep going lean to rich, rich to lean, so it was obvious it was O2 sensors, cars do crazy stuff when they go bad..thanks for anyones input..

 

[Y2kSlvrVert]

How do you reset the ecu?

 

[Bluffing024]

How do you reset the ecu?

Unhook the battery for 30 minutes. (Doesn't take that long but thats what I do anyway.)