Where is the battery located in a 1991 olds cutlass supreme?

check the fusebox under your hood for the horn relay,should be a black box close to your battery that has fuses in it

the fuel filter is located on the passenger side along the frame ahead of the fuel tank.its about 3.5"long by 2.5"in diameter with threaded fittings on both ends.you will need a 5/8"and 7/8"wrenches to disconnect the fuel lines and a 3/8"socket to undo the bracket that holds the filter to the area.

You can go to a nearby parts store and purchase a Haynes automotive reference guide and it contains all the different diagrams that would need. On the front of the book it would say 1990-94 lumina cutlass etc.

PCV valve under hood center upper engine area, mounted in rear valve cover.

1991 Oldsmobile Cutlass Supreme 3.4L SFI DOHC 6cyl
The Oxygen Sensor is located: Under hood, center, rear engine area, below valve cover end, mounted in exhaust pipe

Hope helps with this.

I am having a similar problem, but there is no check engine light. It seems that mine dies at the light or running, if the rpm's drop. I am wondering if the Idle air control valve is bad or possibly the ERG valve?

yes

Did you check the starter relay and make sure that all the connections to the starter are correct?

it all depend on the millage, and how dirty the oil is

if oil very dirty it will be worst for your transmission

have u checked the fuel filter and check to make sure the sparkplug wires are all correct and the wires for the ignition system ned to be checked also