99 GMC Jimmy w/ intermittent problem. Cranks but won''t start. Sits for a day or week and then runs like no problem. Recently tuned, distro and plugs are good. Fuel pump is good. Gets a spark when it cranks.
GMC jimmy 4.3lAlready Tried: 2 mechanics, new distributor & rotor, checked fuel pump - works, have spark, plugs are good...
HelloCustomer have you noticed if the security light flashes when it does not start?
No trouble lights at all
Okay. If you do not get a security light than I would suspect a bad crank sensor. This sensor commonly goes out and causes a no start condition. It is located behind the crank pulley.
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