idle rough

A few days ago, the RPMs on my 2003 Explorer with the 4.6 started jumping up and down at a cold engine start. The RPMs will continue to jump for 5+ minutes. If you put the vehicle in drive or reverse during this, it will lunge forward (or backward) as the RPMs jump. The RPMs will stop jumping...

I have a 2003 Explorer with the 4.6 and 135k. About 3 months ago, while the Ex was traveling between 45-55mph, it would feel like the trans was slipping in and out of gear. I had my mechanic look at it and he replaced a coil pack and spark plugs and this fixed that issue. A week later, while...

My 2002 Explorer Sport XLT 4x4 4.0L has developed an idle problem. It starts fine when cold and after a five minute warm up it begins to idle up and down and then eventually stalls. It can be driven but acts the same when my foot is off the accelerator pedal. Previously, the check engine light...

Hi I have a 2002 Sports Trac with a Idle problem. When at Idle the truck seems to drop rpm's and sort of stutter for a second and then pick back up. I have replaced the spark plugs,air filter,Idle control valve, the rubber l rube that loops from the front of the engine to the back(sorry I forgot...

I have a 2000 XLT 4.0 OHV that will not start when warm without pumping the accelerator, then when it starts it has a rough idle, and a noise coming from the valve covers/manifold area of the engine, that sounds like an exhaust leak. I cannot isolate it to a point or locate anything wrong. I...

I have a 98 Explorer 4.0 OHV that has been giving headaches for a couple of months. During cold start, the engine idles rough almost like it's missing until I get the engine to 2500 RPM then it smoothes out. Anyway, a couple of month ago, one of the lines to the DPFE had a slice in it so I...

2003 V8, 87k miles, original plugs. Checked for vacuum leaks, cleaned MAF with contact cleaner and air. There was a minor improvement after computer relearn. Installed a new after-market IAC (Duralast from AutoZone $85). Did computer relearn. Result was highly erratic idle and RPM ‘sailing’...

About 2 weeks ago i had to replace the power steering pump on my 94 limited X i now have a chirp from the belt i presume. at a local shop they told me that it was probably some fluid go on the belt and it should go away in a couple days. now 2 weeks later it seems to be getting worse. It used to...

Subtitle: Am I getting screwed? I have a 2004 Explorer that began idling rough (shaking whenever the car is just sitting there) a few weeks ago. I know nothing whatsoever about cars. I checked out Yelp and asked around and finally settled on a garage that had great reviews. Their first...

My '94 Explorer Sport has been running rough for a while. I have cleaned the MAF sensor, replaced the plugs and wires, replaced the throttle control sensor, the idle control sensor, and I have run lots of cleaner through the fuel system. It is getting better gas mileage than I have seen in...

Hello good people and thanks for this great forum. As a new member who has been reading for hours around here trying to find some answers to my specific problem, one thing I have noticed- that trying to find problems/solutions for your specific engine type and year model is very frustrating...