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very cool...thanks for taking the time to upload. I have a 3 month old baby that is sick so I haven't been able to get much done. I'll update the thread with what I find.

I have visually inspected the hoses...at least as much as I could see. I'll take a closer look this weekend and also try spraying some starting fluid around the intake to see if I can get a blip on the rpm's thanks guys....good stuff ...keep it coming

Interesting ....I wasn't aware that was possible. Did replacing your cats fix your problem? My engine is running rough at idle and as you say with the brake on in gear as well as driving through town. It's not as noticable on the highway however there is a noticeable loss of power regardless...

I'll try them in order..thanks

I forgot to answer... it is a SOHC..thanks again.

130 K on the odometer I bought the truck 5yrs ago with 80k..I've never changed the fuel filter... I never suspected that could be the cause because the change was literally overnight. As far as the disconnecting the plugs...the idle vibration got noticeably worse with each wire being...

the plugs looked normal to me...no buildup ...grey/white color

Hi guys...new the forum. I have a 2001 Explorer Sport 4.0 v6 that started running rough the other day. The problem feels like a fouled plug....the problem is consistent at idle and under load. I tried to change the plugs and it didn't help. I also unplugged each wire at the coil hub and...