Hello all i replaced the starter motor on my truck to day as the old once it got hot it wouldnt work untill it cooled down now the new one i put on wont disengage once the engine is running i did not have this problem with the old one and i havent changed anything else other than the starter could it be a faulty new starter is there anyway to check this

thanks for your help

 

probably the starter relay on the fender
had the same problem

 

Won't disengage?
Does it just keep cranking?
Or is it being driven my the engine?

If it keeps cranking it is likely the solenoid is at fault.
One way to tell is to disconnect the little red/blue trigger wire from the solenoid when this happens.
If it stops you have an ignition switch problem.

If it keeps cranking try knocking the solenoid.
If it stops then, the contacts inside have welded together due to high current draw.

If the starter is not cranking but is being driven by the ring gear you need a starter with a different depth of engagement. (3/8" vs 3/4" IIRC)

 

Make sure the key is returning all the way to the run position.

 

In addition to what these guys have said, there is a good chance you may also have a faulty starter. Where did you get the replacement starter? Rebuilds from the most common auto parts stores like AutoZone, Advance Auto, etc. are GARBAGE. I went through 3 different ones on my own truck until I finally just had my local auto electric rebuild shop rebuild the "rebuilt" one for me. And that goes for alternators as well. I have had much better luck with NAPA and CarQuest parts. Their parts in general seem to be of a much better quality than the others.

 

I thought that it may be the soliniod on the fire wall as well so i have disconnected the wire that activates from the key and it still doing it i will send it back and request a new one today

thanks for all your help i wanted to be sure before i sent it back thats the only thing about owning a ford truck in australia it takes 2 weeks to get any parts

thanks