Just got her today, 1992 525i 5 speed with 117,000 mileage. I'll post some pics soon, got her in a good condition everything working well I would say except for the rough idle. I've search on some thread but mine I guess not that complicated. Steadly idling at 800 rpm but rough, as you rev until 3500 rpm is rough whether it be standing rev or moving rev is rough but once you pass 3500 up to 6000 it's smooth as if no problem with it. Look at the MPG, consuming 9 MPG. The previous owner says needs to replace 2 of it's igniter(I'm not sure if what he meant was the coil).The car had been garaged and never started for 4 months not until today when I purchased it.I'm not sure of my diagnosis isn't it rough at low rpm could be fuel issues and like stalling or rough at high rpm its electrical. I plan to change the plugs, rotor, wires & cap. Is there any other parts I should prioritize to change and look into?
Greatly appreciate any input at this point.