2002 Chevy Blazer

Tiny
SHAYNE1111
  • MEMBER
  • 2002 CHEVROLET BLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 118,000 MILES
I hear a rattling noise when in neutral but goes away when warmed up in "park". I can hear it when I drive but not as bad when I first start it. On straight away, and especially up hill, the rpm's will go when I press the gas but it will decelerate. It's like I'm revving it up in neutral because it will not accelerate. It shifts gears smoothly. Only code that came up was for the mass air flow sensor, that has been cleaned since. I've been told the fuel pump is going out. That was checked and the pressure is low.
Monday, November 2nd, 2009 AT 11:10 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
If the engine is reving higher and the vehicle is slowing down, it sounds like the transmission is slipping. Also, if the fuel pressure is low, it wouldn't cause this type of problem. It may cause a miss or the engine to quit at times, but not the engine to rev higher and the car slow down.

Start with making sure the transmission is full.

Let me know what you find.
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Friday, November 13th, 2009 AT 10:51 AM

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