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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

92 Mazda 4x4, Touchy Brakes
Q: I have a problem with my Ď92 Mazda 4x4 B2600 with 104,000 miles, The brakes are too touchy.Itís great on dry conditions but in the rain or snow I have to be very careful. It may be more touchy on the first pump and not the second. I have changed the calipers, rotors, pads rear brakes. Any Suggestions? ....Joe

A: You didnít say whether it was the front or rear brakes that were touchy. But because the brakes are touchy more so on the on the first pump but not as much on the second pump, would indicate that the rear brakes are not operating correctly. This would force the front brakes to do all the braking which is not a good thing. If the brakes have truly been inspected and are in good order then inspection of the hydraulic controls would be next. Many, but not all, pick-up trucks have load sensing valves that control the flow of brake fluid to the rear brakes. Iíve seen these valves gummed-up, rusted or the load sensing arms bent or even unhooked. The result is incorrect to no braking pressure at the rear wheels.. If the brakes are good at all 4 wheels then an inspection of the control systems may provide the answer to your touchy brakes.

 
     
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