Josh41891
New Member
- Joined
- March 18, 2015
- Messages
- 2
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- Year, Model & Trim Level
- 2000 mercury mountaineer
Recently my 2000 mercury mountaineer 5.0 has been acting up. At an idle it will randomly start idLing rough and when I am driving at cruising speed around 50 mph if I hold my throttle at around 1500 rpms it starts surging and running rough. If I give it gas it jumps up to about 2000 rpms and smooths out. It did trigger two codes that said random misfires on the 5th cylinder. I recently replaced plugs and wires and it has a good spark and compression. Any tips would be apprecoated.