I just had a shop install a AEM wide band and anAuto Meter electronicoil pressure gauge. and now my oil light is on?? pressure is 25-24 at idle and about 45-50 while driving...... And what is the number mean on the afr?? and what should it be doing at idle? or in 4th going 45 is?? at wot i saw it go as low as 10.8 and as high as 12.0.?? is that normal

 

Your oil light is on most likely because they simply removed your factory oil sending unit to install the oil pressure gauges' sending unit and since it is no longer getting a signal from the factory sending unit it activates the light. This is nothing to worry about as long as the gauge is reading proper pressure which yours appears to be. AFR is self explanatory, air to fuel ratio. The ideal A/F ratio is stoich or stoichiometric which is 14.7 to 1 which is 14.7 parts air to 1 part fuel. Yours is showing less air and more fuel which is a rich condition which forthe SRT-4 is common and safe, because lean is bad. The lower the number the richer the mix and the higher the number the leaner the mix, and it's better to have a little too much gas than not enough.