Please Help, Starter Problem

[alfonso331]

I hav a 90 mustang 5.0 ,it starts but only runs while holding the key in crank position, so that be starter keeps turning,it dies if if let off key

 

[2000xp8]

While I've never had this issue, I would think that it was the ignition switch on the column. Don't go throwing parts at it based on my word, just use that for the basis of some online searches.

 

[mikestang63]

pull the wire off the S terminal lead of the solenoid when cranking. If it keeps cranking, then it is the ignition switch. Are you having problems with any other electrical components? That is also an indication of the ignition switch. Those switches are known to go bad. Other thing could be the keyed switch itself.

 

[alfonso331]

pull the wire off the S terminal lead of the solenoid when cranking. If it keeps cranking, then it is the ignition switch. Are you having problems with any other electrical components? That is also an indication of the ignition switch. Those switches are known to go bad. Other thing could be the keyed switch itself.

I replayed the ignition wasn't that, I did hav to run my fuel pump with a toggle switch that's fine

 

[alfonso331]

I geuss I'm gona buy a new key lock cylinder and see

 

[jrichker]

I hav a 90 mustang 5.0 ,it starts but only runs while holding the key in crank position, so that be starter keeps turning,it dies if if let off key

Multiple entries for the same problem are not the best way to fix your problem. You asked the same question in you post 90 5.0 Only Stay Running With Starter Engaged.
@madspeed

I answered your question and told you to read the checklist because the answer was in there - Ignition switch or TFI module. You evidently didn't bother to read it carefully to extract the information in it. Please don't clutter up the Forum with multiple entries for the same problem. If you don't understand a technical issue, ask for clarification.

 

[alfonso331]

no put a brand new tfi, it was not that,, still only runs on the starter

 

[jrichker]

Did you check to see if there was 12 volts on the red/green coil wire when the key is in the Run position?