What is your question?
I have a 2 wheel drive 3.0L with 185,000 miles. It starts quickly and idles fine at 1,200 rpm while cold. Once it warms up and idle drops to 800 it starts to have random hickups and RPM drops to 650-700 but quickly recovers. Sometimes only once every few seconds sometimes 2-3 times in a row every 3-4 seconds, completely random. It is worse when in gear with brake applied and idle drops to about 600. Really rough chug-a-lugging when trying to drive until you get up to 15-20mph then is runs smooth and has lots of power, but even worse and will hardly go at all if AC is on at the same time. I have replaced spark plugs, plug wires, all coils. Condition had gotten steadily worse over past month so I removed, tested and thoroughly cleaned all injectors and thoroughly cleaned intake manifold and throttle . All fired well out of vehicle. Cant reach injector plugs to test on vehicle. All vacuum lines are in place and in good shape. Idles smooth when cold and first started. What do I check next
What makes this problem better or worse?
It's worse when warmed up and in gear or AC is on.
How long has your 2000 Mitsubishi Montero Sport had this problem?
A few months
