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A collection of helpful articles based on reader submissions
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  Jim Grant's Tech TipsJim Grant's Tech Tips
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 ALLDATAdiy.com users over the course of many years.
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  Jim Grant's Tech Tips

‘89 Ford Escort, Jerking Car and Check Engine Light
Q: I have an ‘89 Ford Escort that just recently started having problems. What happens is that the Check Engine light comes on during normal driving and suddenly the car starts jerking and trying to go but acts as though its being held back. I have had all fluids and filters changed other than the PCV valve and air cleaner which is in good shape. I changed the plugs, and other maintenance items, but it still has problems and now more frequently though the light does go out at times and the car runs as normal. I was wondering if you could tell me what this light is monitoring and what can I do to put it out for good??

A: The light is not monitoring anything. It is the vehicle’s computer that is turning it on to alert you to a system problem. The only way to turn the light off, short of ripping it out of the dash, is to have your technician connect a diagnostic scan tool to your vehicle’s computer and ask it what’s bugging it. The tech should have no problem viewing the history files in the computer to find out what it’s upset about. Once the information has been obtained then the corrective repairs can be made to get your vehicle running right once again.

 
     
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