Question about 1999 Ford Ranger SuperCab

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Why is my engine revving while driving and goes through the roof with clutch depressed?

Engine revs like mad anytime you aggressively accelerate in traffic. Then continues to rise. If clutch is depressed it increases to the point that it sounds as it will blow up. If I shut it off, it revs at startup and smoothes out to perform normally until aggressively accelerated again. Have also found if I come to a stop (hard to do since it revs so high) and go into reverse, back to 1st, reverse, 1st, reverse, 1st...5 or six times it evens out. It's not showing any codes. Has had a full tune up, checked for vacuum leaks (none), new 02 sensor. Also, I can minimize its revving by running it extremely low in the gears (ie, in 4th at 30 mph, 5th at 40 (my tachometer has never really worked). Also, when it's shut off and restarted...the gas gauge goes to empty and stays there for a few miles and then returns to a correct position.

Posted by Anonymous on

  • Roger Chapman
    Roger Chapman May 05, 2014

    The first thing I would check is the Throttle Position Sensor, located on the side of the throttle body opposite the cables that come from your accellerator peddle. If it is bad it can cause over throttling or aratic throttle response. How ever it should show a code. You may not be getting codes because you computor may need replaced. I would try the throttle position sensor first. If that don't fix it, then I would consider having someone put it on a service computer to check the onboard computer.

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6ya6ya

6ya staff

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Posted on Jan 02, 2017

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Anonymous

  • 1 Answer

SOURCE: Ford Focus Engine problem

have you tried having your fuel injectors cleaned on it. the engine might not be getting enough gas at take off. it might also be that your gas tank fuel pump or the other fuel pump going bad

Posted on Dec 30, 2008

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Anonymous

  • 56 Answers

SOURCE: engine over-run between gears

This is a very common problem for ford. I have the same thing every day. It is the computer not reading the temp. When it does that just tap the gas pedal.

Posted on Jul 21, 2009

Anonymous

  • 538 Answers

SOURCE: engine idles excesivly high after carb was rebuilt.

I sounds like the choke is not adjusted properly or the linkage for the fast idle cam is sticking. The fast idle cam is on the right side (passenger side) of the carb kind of behind the choke assembly. It could be the choke pull-off is not working or is not adjusted properly. Does the choke open all the way when the vehicle is fully warmed up? If not I'm guessing the choke stat (black plastic round) is not working or is installed wrong. Does that one have a wire going to the stat, is there 12V there when engine is running? That gets power direct from the alternator and will only have power there when the engine is running.

Posted on Dec 13, 2009

Anonymous

  • 1 Answer

SOURCE: 1. My 2006 2WD Explorer (65,000 miles) has

jtg

Posted on Jan 14, 2010

Anonymous

SOURCE: Transmission slips. Goes to 3rd gear then slips,

Trans Solenoid Pack or Solenoid related,is more likely. You can go for a ride with a professional scanner attached,and watch sensor data. Now IF the vehicle,has never had the trans fluid changed,at least three times in seven years, you may have bigger issues,internally. Hope not!!

Posted on Mar 15, 2010

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I would have to doubt that is what is really happening, tho. Is it possible that the engine is revving from the time that you start it, until the time that you shut it off?
This would be more likely, as depressing the clutch doesn't really have any effect on the engine, other than dis-engaging the drive-line...
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