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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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  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.
If you have any questions, please feel free to email us.
 
 

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  Jim Grant's Tech Tips

'96 Ford Windstar, Misfire Codes or Misleading Computer

Q: My ’96 Ford Windstar has a reoccurring computer code for a #4 cylinder misfire. I have changed the coil, plugs, wires, do you have a suggesting. I have changed these items one at a time and every time it comes back as #4 cylinder. Oh ya, I changed #4 fuel injector.

- Joe A.

A: You may not be happy with this. You cannot always believe the cylinder misfire code that the computer is reporting. That’s right, the computer can be wrong. We had a Ford Windstar in the shop that had a misfire code for #6 cylinder. There was no problem telling the engine was skipping; it was clearly running rough. Diagnosis found that there was not a problem with #6 cylinder. The real problem was in #2 cylinder. The problem was # 2 cylinder was on the opposite side of the engine. It turned out that #2 cylinder had a bad valve (no compression in that cylinder). The vehicle’s computer was insisting that the problem was #6 cylinder. Your vehicle’s computer could be sending you on a wild goose chase. That is why you should prove the problem before replacing parts.

 
     
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