4

I have a 2004 Explorer/v8/4wd/bauer edition. When I take off from a stop, there is a slight lag and then the vehicle over accelerates (sort of "jumps" off the line). If I gradually apply the accelerator, get the vehicle rolling slightly (maybe 5mph), it seems to do this less but it is still very touchy the first say 5-10% of the throttle from start. I took it to the transmission shop, he says it is not the transmission (he has seen the same issue with another explorer - he thinks it's the throttle control mechanism). The vehicle runs and shifts perfectly at all speeds, conditions, other than starting from a stop.

  • Whens the last time you had the upper intake tract cleaned, to include Idle Air Control Valve and throttle plate? – Pᴀᴜʟsᴛᴇʀ2 Sep 2 '15 at 0:11
  • Just purchased vehicle so I do not have that info. Mileage is 155K. Looking through service records and I don't that that has ever been done. – staggart Sep 2 '15 at 0:25
  • That is where I'd start. I am a fan of a good SeaFoam treatment and then using some carb cleaner to clean up the throttle body and IAC. – Pᴀᴜʟsᴛᴇʀ2 Sep 2 '15 at 0:30
  • @paulster2: thanks for the seafoam writeup. I might buy the throttle plate and ACV being my issue, but not going for the internal carbon buildup or dirty crankcase... That's a stretch that I can't see a connection to. – staggart Sep 2 '15 at 0:46
  • The idea of the SeaFoam write-up is about getting the entire engine clean. You are right in that internal carbon buildup or a dirty crankcase (if you keep your oil changed on time especially) is not going to be a real issue. Get the top end cleaned up and I'll bet your issues will be gone. That part of the procedure is what I was really getting at. – Pᴀᴜʟsᴛᴇʀ2 Sep 2 '15 at 18:20
1

I removed and cleaned the air control valve thoroughly and the problem is completely gone. I tried using seafoam for the cleaner and while it did work, it was not nearly effective as choke and carb cleaner (suggested by someone else on the Ford forum).

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.