Masterd
Well-Known Member
- Joined
- October 16, 2005
- Messages
- 807
- Reaction score
- 6
- City, State
- Upland, CA
- Year, Model & Trim Level
- 1993 Explorer Sport
So Ive been tinkering around lately trying to eliminate causes for a misfire / rough running condition at about 2500 rpms, and finally got around to recording a video today and need your guys' help analyzing it. Idle vacuum is about 20-21 inches but the needle flicks ever s slightly at idle, just a slight buzz not a significant movement. However when you rev the motor between 2000 and 2500 the needle starts to flick quite a bit and it runs rough, but above 2500 the needle smoothes out again and it appears to run better. While driving, this presents itself as a knock/thump sound at 2000 to 2500, and as soon as it hit 2600 rpm the power hits out of nowhere. So bascially, less power at low revs and then the power hits out of nowhere above 2600. Heres a video to look at and see if you guys can spot anything out of the ordinary:
Click the image to watch it
Click the image to watch it