Starter solenoid is sticking. Replace it.
the starter should not stay engaged after the vehicle is running. more than likely the armuertor or the bendix is faulty. replace the starter.
solenoid broken
Could be defective stater solenoid that is not releasing
two things..the ignition switch its worn out and need replacment or the selenoid inthe starter its going bad, need to replace starter,one or the other,,
Either the ign. switch is faulty, or the starter is faulty Or the starter solenoid is stuck closed, so the starter is constantly engaged and getting voltage from starter relay. If so you would need to replace the solenoid.
A new starter remains engaged while the engine is running primarily due to a malfunction in the starter relay or solenoid. When the engine starts, the ignition system should cut power to the starter, but if there's a wiring issue or a stuck solenoid, the starter gear may remain in contact with the flywheel. This can lead to excessive wear and potential damage to both the starter and the engine components. Proper diagnosis and repair are necessary to prevent further issues.
If this happened immediately after replacing the starter, I would say the wires on the solonoid are connected wrong. It could be the switch but I think it is the wiring.
The 1991 Ford Explorer should have a separate starter relay that sends power to the starter. It sounds like the relay has stuck and is sending power to the starter even after the vehicle is running.
they have to stay in 14 days C;
You need a new bendix on the starter. I've put 2 different brand new starters on cause the first new one was doing it. Now the second new starter is doing the same thing, staying engaged.I don't believe that's the answer but thanks. I'm trying a new solenoid on the fender.
Sourdough starter can stay in the fridge for up to two weeks before it needs to be refreshed.
Either the keyswitch has failed or the contacts inside the starter have fused.