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2006 Ford Explorer Acceleration

Tiny
BEAVILLA
  • MEMBER
  • 2006 FORD EXPLORER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 32,000 MILES
Hello,

I bought my vehicle used about 5 months ago and luckily it still has manufacture warranty however it is due to expire on Sunday.

Lately I've noticed that my truck has this big jerk when I switch to Drive or Reverse from being parked all day or night. Also noticed that while I have been driving and after being idle sometimes the engine sounds VERY accelerated. So loud that I can feel it as Im driving and hear it with music on.

I took it to get serviced and they did find a problem with the transmission so I thought both problems were related to the transmission issue. Wrong, I still have the acceleration problem. I had the problem again yesterday and I had already been driving for about 25 mintues. I stopped at a red light and when I turned I heard the loud accelerated noise again. My truck is still going but I failed to look at the RPM Gage to see if it was going high. I also noticed since the recent repair, that it seems as though I am having to press on the gas a lot more while I am on the highway because I feel like if I dont have my foot down on the peddle hard enough it decelerates. I don't know what could be causing it!

PLEASE HELP!
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Wednesday, July 15th, 2009 AT 5:31 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
First, before the warranty expires, call them and tell them there is a problem so it is documented prior to the experation of the warranty. Next, does the noise you hear seem to happen after you have been at a light for a few minutes? Does it sound like a whirling or fan sound?
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Thursday, July 16th, 2009 AT 10:34 PM
Tiny
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  • MEMBER
  • 4 POSTS
It sounds as though I am trying to hit 70MPH in less than 10 secs but I am only slowing accelerating to maybe 15-20MPH. Thats how loud the acceleration sounds. It isnt making any other noise and I doubt it's the fan.

Is it likely that a fuel pump is involved? Or the fuel pressure? Would this problem show up as a code if they run the machine through it? They are telling me that can't do anything until the technician can duplicate the problem so they know how to proceed.
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Tuesday, July 21st, 2009 AT 5:41 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
I honestly doubt the fuel pump has anything to do with it. When you hear the noise, is the engine actually reving or does it just sound that way? I wonder if the transmission is slipping.

As far as checking for codes, fuel pump pressure won't set a code. However, if the pressure causes the engine to misfire, it will show up as such, "Random Engine Misfire."
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Tuesday, July 21st, 2009 AT 10:45 PM
Tiny
BEAVILLA
  • MEMBER
  • 4 POSTS
I spoke to the advisor who did the first repair with the transmission - he repaired a part called shift selenoid. Anywho, I spoke to him and told him that one of the issues I reported wrong the first time was still happening. He mentioned that possibly not enough air going in through a fan at low speeds etc? I can't remember the words he used.

Any idea what he may be referring to?
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Thursday, July 23rd, 2009 AT 5:06 PM
Tiny
BEAVILLA
  • MEMBER
  • 4 POSTS
I am sorry, I forgot to mention that yes, the engine does sound like it is revving because the truck is in motion when it happens and the last time it happened I noticed that it wasn't allowing me accelerate past 20 until it stopped sounding like that and it continued. The revving only lasts about 10-15 secs. At low speeds.
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Thursday, July 23rd, 2009 AT 5:10 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
Now we have two things. First, it sounds like the transmission may be slipping. If the engine revs and the vehicle doesn't pick up speed, that usually indicates bad clutch plates in the trans. Make sure the trans fluid is full.

Next, the fan he is refering to (I believe) is the fan clutch that draws air through the radiator to help cool the engine. After a certain temp is reached, a clutch engages the fan so it spins full speed. WHen this happens, there usually is a loud whirling sound from the fan. Many people never hear it because the engine never gets hot enough. However, that is a consideration.
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Thursday, July 23rd, 2009 AT 8:45 PM

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