I had an alternaror go bad. The last time I drove it, the speedometer was unstable, the engine would miss, the trans shifted eraticly, the ABS light lit. I'm afraid the alternator damaged the ECM. The alternator has been replaced along with the belt tensioner and idler pulley. The same still happens.
I checked all the fuses I could find. I suspect I have missed a few. I just recieved a set of factory manuals on this thing. Talk about information overload. 4 large books. I'm going to be busy for a while.
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that's becasue the new abattery went dead because it was not charging. The battery light must be OFF to charge the battery. Take it back to whoever fixed it. May be a bad wire betwen battery & alternator too.
check the 175 amp mega fuse in the engine compartment.
cehck this ground for a good connection - G104 Left front fender near air cleaner
check the 20 amp fuse for the charging system. Fuse 26 in teh engine compartment fuse box.
hi the engine is not skipping the problem is the engine is miss firing that is caused by a bad .spark plug or -wires-or coil pack - when was the last time the car had a tune up . check spark plug connections
Most of the time when the speedometer stopps the odometer stopps too it it has the transmission may have troble ( if it's automatic as the speedsenser helps the trans shift as the computer shifts the trans too. the check engine light should be on also if it's not and the odometer is still working the problem is in the speedometer itself and the unit can be shipped off though your ford dealer for repair but I woould'nt do that till the speedometer has been removed unplugged and replugged in to see if it's just a bad connection. The speed senser can fail too but you will have these other problems tha I mentioned. The senser is on the side of the transmission nesr the place the drive shaft is connected to the transmission. If the automatic transmission shifts normally and the check engine lightisn't on the senser is likly to be good.
well you should do a diagnostic code check. although a code read will not show things like , bad air filter causing motor to mis fire, it will not detect a bad intake gasket, it will not detect a bind or bad chain gear in trans or axles. but it will give you a better understanding with the motor condition and then you can start eliminating causes till you get to the problem. I wish the best to you
Sounds like your alternator died. Check wiring, fuses and replace alternator as should test bad. $80.00 at a scrap-yard should be a general price for used.
Back-yard mechanic should install for $20.00 Good luck.
It sounds like the Vehicle Velocity Sensor (V V S) has gone bad or the wire harness has gotten damaged due to corrosion. The V V S sends signals to the ECM which will indicate to the transmission when to up and down shift according to the engine speed and will send signals to the speedometer. The sensor is on the driver's side along the tail shaft if the transmission, good luck and keep me posted. Auto Zone will have the sensor and give you the step by step instructions and should take no more then 15 min to replace, it's held on by one bolt and the wire harness just unclips.