: 1994 SLS P)43 and P045 Codes??

02-09-07, 09:28 PM
I just bought a 94 SLS w/ 110k miles and it started running rough from idle to about 30 mph (I can't notice it much beyond that). Codes PO43 and PO45 are current which I believe mean that the 02 sensors are running rich. Gas mileage is terrible at roughly 10 mpg and I can see the gas via exhaust smoke going out the back on acceleration. It's also starting hard too. My thoughts are possible bad 02 sensors, fuel injector problem or faulty PCM. Any thoughts on this one? Thanks, mr_mr11

02-09-07, 10:11 PM
Check for a leaky FPR first. Go to the tech tips section for an explanation if you don't know how. It's very simple.

02-09-07, 10:16 PM
Ranger - Will do and will let you know. Thanks Much.:tisk: