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Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
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Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by users over the course of many years.
If you have any questions, please feel free to email us.



Lincoln - Mercury
  Jim Grant's Tech Tips

91 Buick LaSabre, Take Me to Florida
Q: I have a '91 Buick LaSabre that, for some reason, doesn't like to start right up in the cold. I wore down the first battery, replaced it, and two weeks later am experiencing another problem. In order for me to start her up on a very cold day (17-25 deg.) I need to press the accelerator to the floor and flood it. I have put dry gas in the tank, when it happened two weeks ago. Other than that I don't have any complaints about the car, she rides beautifully. I just had the car at the dealer's to do an overall check, and had the EGR valve replaced. It seems since then, on a cold morning I seem to be experiencing the awful problem of not starting. It almost seems like the car is screaming for fuel, but not getting any. Would appreciate all the help I can get.

A: Cold weather startup demands the most from a vehicle. >From what you're describing either the engine is not receiving enough fuel or the spark from the ignition is not strong enough. The fuel pressure must be to factory specifications. The vehicle's computer uses information from a temperature sensor, mounted on the engine, to determine how much fuel is necessary to start the engine. If the fuel pressure is correct and the computer has the right information, then the ignition system should be inspected more closely. Of course the spark plugs and wires must be good shape. The strength of the spark from the ignition coil is critical for starting. A good ignition coil on your vehicle should have no problem delivering over 45,000 volts of electrical energy to the spark plugs. Yes that's 45,000 volts! If you get across the ignition wires the wrong way you'll be doing a bunny hop. It would be best to have your technician diagnose these components because it requires specialized equipment, training and information.

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