1991 f-150 cranks and turns over then dies as soon as I release the key. I have already replaced the key cylinder.
replace the switch box under dash it is bad it is connected to the key switch
I agree with kimberly,check igintion box.
Thank you I will try this.
I had a 1978 Nissan skyline that did the same thing. I had to hold the key half way on to keep it running. Replaced the ignition still did it. Turned out to be a 10amp ignition fuse.
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