Hello, My 1998 Montero runs fine cold but has a rough idle then dies when warmed up. what could cause this? Another thing, While driving the montero the Brake, Automatic transmission, and battery lights flash, also causing a loss of power when lit. There are no codes and I've already replace spark plugs, boots, battery, alternator, and most gaskets on the upper engine. Any ideas on what could cause this?

 

Is it possible to get vapor lock in this vehicle?

 

With all the lights flashing, I'd be checking for a bad ground first. Is the engine carburated or fuel injected?

 

Fuel injected

 

Check engine grounds, wiring to the alternator and battery. Check for cracks in the intake manifold - possible vacuum leak.

 

I replaced all direct wiring to the alternator, Ill warm her up and spray some starter fluid again and see if there was anything I missed. Thank you!

 

disconnect and clean all engine grounds as well as the one from battery to body

 

my 1998 3.0L had the same problem I ran seafoam threw the gas, crank case,and vacuum lines and it quit. Good luck

 

Check the alternator, might be on the way out.