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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

‘86 Ford Ranger, Will Not Run
Q: I have an ‘86 Ford Ranger with a fuel injected 2.9 lit engine. I use injector cleaner every tank full of gas. I had it parked for two months while replacing the transmission. I drove it for three days then it would not start. I sprayed carb cleaner into the throttle opening and it started and ran, then nothing. I can get it to start with the starter fluid by spraying it into the throttle port, though it only runs until the starting fluid burns then shimmies and dies, what flow path should I take to troubleshoot this? Do you think it is the fuel filter,pump,the jets, or some electrical problem,maybe an air/fuel flow mixture component?

A: You’ve proven that the engine isn’t getting enough fuel. So you can rid yourself of that starter fluid before a fire gets started!. Have someone listen at the gas tank when the ignition is first turned on. There should be a buzz or hum from the fuel pump for 3 to 5 seconds then it will shut down. If nothing is heard then there is an electrical supply problem or the pump’s bad. If the pump runs then you have to check the fuel pressure. If you look closely at the fuel rail that supplies the fuel injectors you will see what looks like a metal tire valve stem and cap. This is the test port for checking fuel pressure and should be in the area of 40 psi when the key is turned on. Once you pin down your problem and make the needed repairs, stop using the fuel injector cleaner in every tank of gas. That stuff will cause more long term costly damage than you could imagine.

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