tach drops to zero with engine still running, won't rev up. | Ford Explorer Forums

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tach drops to zero with engine still running, won't rev up.

bushmonkey

New Member
Joined
October 11, 2006
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Year, Model & Trim Level
01 Explorer Sport
I have a 2001 Explorer sport. I have had battery problems in the past but this is the first time that this has happened to me.

A few days ago I had to borrow my dads truck boost the explorer to get it started. After putting the truck back and getting behind the wheel I noticed the tach was sitting at zero but the engine was still running.

I tried hitting the gas to see if it would rev up but the engine just bogged down and returned to normal when I released the gas pedal.


Anybody have any ideas what is going on and what I can do? If I could get it running so I could drive it to the city that would be great. I am a good hour from the city so I really don't want to tow it there to get fixed.


EDIT: I put in a new battery and that seems to have fixed the problem. Shouldn't a vehicle be able to run properly even without a good battery once it is started?
 






Measure the output from your alternator.
 






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