1998 Oldsmobile Silhouette Logo
Posted on Apr 09, 2010
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As I slow down or stop at a stop sign or red light it turns off. It drives good in a highway, as soon as I get out of the highway it turns off, or as I'm driving in the city. Took it to the mechanic can't find nothing, they put it on computer (diagnosis), nothing comes up. Not heating up.

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JIMMY

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  • Posted on Apr 09, 2010
 JIMMY
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Does it happen in stop and go traffic? If the answer is no and the only time it does happen is at speeds at about 40 mph's or better then its the brake switch its failing to cancell out Torque converter clutch solenoid (TCC). If it happens at all speeds take the vehicle to a shop that does SCOPE TESTING NOT A SCANNER this way they can hook the vehicle up to the SCOPEMETER and drive around with it to see what turns off (other than the vehicle) and causes the vehicle to die.

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tip

Save Money on Gas/Petrol

  1. Avoid idling. While idling, your car gets exactly 0 miles per gallon while starting the car uses the same amount as idling for 6 seconds. Park your car and go into the restaurant rather than idling in the drive-through. Idling with the air conditioning on also uses extra fuel. Also, avoid going so fast that you have to brake for someone. Whenever you brake, you waste the gas it took to get going that fast.
  2. Drive at a consistent speed. Avoid quick acceleration and hard braking. Cruise control will keep you at a constant speed, even when going up and down hills.
  3. Avoid stops. If approaching a red light, see if you can slow down enough to avoid having to actually stop (because you reach the light after it is green). Speeding up from 5 or 10 miles per hour will be easier on the gas than starting from full stop.
  4. Anticipate the stop signs and lights. Look far ahead; get to know your usual routes. You can let up on the gas earlier. Coasting to a stop will save the gasoline you would otherwise use maintaining your speed longer. If it just gets you to the end of a line of cars at a red light or a stop sign a few seconds later, it won't add any time to your trip. Ditto for coasting to lose speed before a highway off-ramp: if it means you catch up with that truck halfway around the curve instead of at the beginning, you haven't lost any time. In many cities, if you know the streets well, you can time the lights and maintain the appropriate speed to hit all green lights. Usually this is about 35 to 40 MPH.
  5. Slow down. Air resistance goes up as the square of velocity. The power consumed to overcome that air resistance goes up as the cube of the velocity. Rolling resistance is the dominant force below about 40 mph. Above that, every mph costs you mileage. Go as slow as traffic and your schedule will allow. Drive under 60-65 since air grows exponentially denser, in the aerodynamic sense, the faster we drive. To be precise, the most efficient speed is your car's minimum speed in it's highest gear, since this provides the best "speed per RPM" ratio. This is usually about 45 to 55 miles per hour.
  6. Use A/C only on the highway. At lower speeds, open the windows. This increased the drag and reduces fuel efficiency, but not as much as the AC at low speeds (35-40 mph). The air con - when used a lot - is known to use up about 8% of the fuel you put into your car.
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