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I have a 1986 e350 with a 5.8L that won't start. Was working great but have noticed the ignition lock cylinder getting hard to turn when cold. The other morning van just wouldn't start but turns over fine. I was thinking to change the ignition control module or the coil but was wondering if a bad lock cylinder can allow the starter to turn but not provide spark to start.
Most column-mounted ignition lock cylinders only move a sliding contact switch which give the various detents: acc, off, on, & start. If the cylinder can turn and the rod attaching it to the sliding contact are working the issue would be ignition related, not to the cylinder.
The hard effort is symptomatic to other issues though---wanna look into what's causing that, fix as necessary.
Thanks, I'll try the coil or control module, I guess the cold weather was just coincidental?
Cold weather can have that effect on a lot of things. It does tend to highlight things operating marginally already---batteries, weak anti-freeze, alternators are but a few examples.
Heck I've got an older Pontiac that seems to have a heading south headlight switch. The dash lights don't come on until the interior has warmed up--after that its fine the whole time.
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