My Explorer has no acceleration

[Chris Becker]

I bought my 99 XL last year with 120,000 mi and lately it has no power to accelerate and seems to bog down when I hit 3000rpm. This is true even if I put it in nuetral and try to rev it! Is there a restriction in the gas? Maybe the fuel pump(I thought I heard a whining a couple of times after reving in nuetral)? Or maybe the transmission (please no!!). I have also noticed that on steep inclines going down that if I manually shift into a lower gear to save brakes that the transmission does not down shift. Any thoughts on any of this my fellow explorers?
Chris

 

[aldive]

Have you had a diagnostic scan to test the O2 sensors? How is the fuel pressure? When was the fuel filter last xhanged?

 

[Explorer_2196]

Go to Autozone and get the free diagnostic test. My friends Mustang had the same problem. Ended up being a couple of $10 sensors and a dirty air filter.

 

[Chris Becker]

I will chk out autozone....and chk the air filter...the fuel filter is probably dirty also. I will try these things and let you know what happens. I have never had any diagnostic chks.
Barry

 

[BarryBecker]

Well I rudely never got back to you with the problem solver. It was a loose wire to the fuel pump. At least thats what my mechanic said. It cost $240 to find that out. He initially said it was the fuel pump and was going to replace! Thanks for your help.

 

[Majisto]

It could be in the MAF. Try cleaning that out. It wouldn't be in the transmission if it happens in neutral as well. It's a fuel system or intake problem.

 

[BarryBecker]

Do you clean that with just an can of compressed air?