Won't downshift when passing
Sounds like you have two problems, rough idle from an 89 would indicate mutliple problem possiblilities. Spark plugs, timing chain, injectors, coil pack, vacuum hose corrosion. Start there and if that doesnt solve the idle issue its time for a mechanic or a trade in.
For the no downshift, slow down lol. It could be an out of spec throttle cable. Check to make sure the cables are free and clear of debris and no kinks are present. The throttle linkage should move freely while the engine is off and again while running, be careful here.
Unfortunatly we may have to face the truth the old girl just doesnt have it in her anymore. Take it slow and easy, shes earned it.
on Dec 24, 2012