Question about 1998 Ford Ranger SuperCab

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Check engine light has come on. Truck running okay except when reaching 30-40 mph starts to vibrate and then works thru it pushing excelerator down for more power, engine stops jumping.

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Hi..
this is because of the critical RPM. in particular RPm it coincides with the resonants frequency. Due to this the vibration may occur. then when you overcome this RPM then it runs normally. please try not to run your truck in that particular RPM

hi if you feel the information which i gave is useful please vote me

Posted on Jul 10, 2010

  • Ed Paje Jul 12, 2010

    If you feel this are the best suggestions, then proceed at your own risk. This gives me a bad name as a real mechanic. I hope this guy would steps up to the plate when something goes wrong and takes responsibility for his suggestions that have gone wrong, causing you property damage and even personal injury. Good luck and be safe.

    When a check engine light comes on there is a specific reason why it did so. There are tools and proper procedures to diagnose your vehicles operation. In order to know what malfunctioned, causing poor vehicle performance, a factory specific scan tool is used or it's aftermarket equivalent. This scanner is connected by a cable to a rapid data connector port hidden within your vehicle. The scanner will access your ECM (Engine Control Module) and communicate, exchanging data for the function you're investigating. From there, it will tell you what system malfunctioned, giving you it's location or address within the system. Once you located that system's controller, you will request for fault codes that are now stored in memory. Depending on vehicle manufacturer, it could be distinguished as DTC (display trouble codes) and so forth.
    Your check engine light is on because a malfunction within the system has failed, and needs correction. The codes will not tell you anything else, it has to fail or be above or below it's threshold within it's set parameters. Unless corrective measure are done to that failed system or component, your check engine light will stay lit no matter how many times you erase or reset it.

    Now what I'm suggesting is get it scanned and write down the codes which needs to be translated as readable information. Obviously you have a driveabilty issue because upon reaching a certain speed, you can feel something is not right, demanding more physical input from before. Have it scanned, good luck. No need to rate me because I know I can step up to the plate.

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Are you sure that the engine is vibrating and not the front end of the truck ? I had the same problem on my Ford years back. I found out it was the front wheel bearings were loose and needed grease. Also the tie rods were worn, and a front end allignment and wheel balancing will all help. If it is the vehicle. If it is the engine, try setting the timing, check the sparkplugs for corrosion, and add some fuel injection cleaner and run it. Hope something of this helps you out.

Posted on Jul 11, 2010

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