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1994 RANGER 4.0 6CYL 2WD

There are two problems im having. 1) when i get up to a high speed,lets say 60, and i push on the pedal to accelerate my truck shakes. it starts small and then shakes violently and doesn't go anywhere. Whats causing this? 2) When i step on the accelerator i hear a tapping noise like a metal tube is bumping more metal under neath on the driver side it sounds like. could this have something to do with the first problem above? if not whats the deal? 3) i know i only said two but i just thought of this one. my truck after driving an hour to or from work or anywhere in that matter, when i turn off the truck and then crank back up it idels very rough and acts like it wants to shut off until i give it gas and start moving then its fine. it also sounds like a freaking jet inside thae cab but i'm not sure if this is due to it being a single cab and the motors a 4.0? please help with the above situations so i can get my truck back. it only has 110,000 original miles.

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  • Cars & Trucks Master
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Is it an automatic or manual trans ?
An automatic should downshift when you push on the gas pedal. The shaking could be a miss-fire or lack of fuel. The noise could be a knock from the engine or something in the exhaust system.
The freaking jet noise could be an exhaust leak or something going on with the air cleaner or a vac leak.

Posted on Dec 05, 2012

  • alex gainey Dec 06, 2012

    Lol. The knocking isnt from the engine. It's like a rattling noise when I accelerate coming from underneath the truck it sounds like. The jet noise I'm meaning to say is the engine is just loud in the cab.


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SOURCE: 1994 Chevy Suburban 5.7L V8

This problem sounds more like your serpentine belt is loose or has become glazed. When you accelerate, the belt can't keep up with the torque of the flywheel pulley due to the drag of the accessories, resulting in a squealing and/or chirping of the belt as it slips on the pulley. This is amplified during turns due to the extra drag of a laboring power steering pump. Try going to your auto-parts store and picking up a bottle of belt dressing, about a buck a bottle. Apply this to your belt according to the instructions on the bottle. This should help your belt regain its "stickiness" if it is indeed glazed. If this doesn't solve your problem, a new belt may be in order. Hope this helps out. If the problem persists after a new belt, reply to this answer and we can dig a little deeper. Have a great day!

Posted on Jun 10, 2011

Testimonial: "Thank you I will try your suggestions; everything I read was supporting a belt problem. Appreciate the timely response!"

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