reasons for E4OD to go into limp mode???

[farmerx]

What are the possible reasons for this transmission to go into limp mode? It runs fine for a while then goes into limp mode and we have to disconnect the batteries for a while then the possess repeats itself. It is a '94 7.3 idi 4X4. Thanks

[chuckster57]

there are different reasons for the tranny to go into limp mode. check the connection at the transmission on the passengers side for corrosion. Is the O/D light flashing? If so then there is a stored code for the tranny. Below is the link to retrieve the code(s) with an analog Ohm meter. could be a bad FIPL or MLPS..pulling codes if any is the place to start:



Troublcodes.net Trouble Codes OBD & OBD2 Trouble Codes and Technical info & Tool Store. By BAT Auto Technical

[rsr911]

Sensor or connector trouble. There will be codes in the computer. Could be FIPL, MLPS, VSS, Tach. Most common seems to be FIPL sensor. It could also be a corroded connector on the passenger side of the trans, typical test is to remove and replace it and see if it gets better. Get the codes LOL!

[osufireman]

Like said above, get the codes! Sounds like what you're doing by disconnecting the batteries is wiping the stored codes, allowing it to function for a little bit then it goes into Limp mode when the error code comes back after all systems are warm and should be functioning.

I got an OBD I code reader at Autozone for $30, cheap investment and then you have one at home to read codes any time you need.