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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

88 Ford Bronco, Complete Shutdown
Q: I have an '88 Ford Bronco with a six cylinder engine that has 117,000 miles. After a mile or so the vehicle will completely shutdown. After a 5 to 10 minute wait it will restart. I have had all of the following parts replaced with no change in performance. Relay assembly fuel pump, ignition coil, ignition module, distributor parts, EEC relay, from fuel pump, intake fuel pump, and oil pressure gauge. What is the next step? Any help will be appreciated... Robert.

A: What did any of those parts have to do with your stalling problem? You've spent a lot of unnecessary money on unnecessary replacement parts. There has to be a diagnostic strategy in solving a problem like yours. In the most basic terms there are three components needed for a sound engine to operate; air, fuel and spark. The first step of that strategy is determining which one or more of the primary components of engine operation is failing. Recently we had a vehicle in the shop that exhibited a problem similar to yours. The exception was that the condition was random, operating time, temperature or weather had no effect on the condition. The engine would just quit, but would restart a short time later. The vehicle was equipped with a fuel pressure gauge, vacuum gauge, tachometer and cellular phone and was then driven in close proximity to the shop. When the failure occurred we were able to quickly identify the condition of the primary components of engine operation. The ignition coil had an internal but random electrical short. It took time but only the necessary part was replaced. For your problem, a diagnostic strategy is needed and remember, if you cannot prove it's broken... don't replace it.

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