I had the same problem with my 1993 suburban. It would run but suddenly lose power and the engine would stop. After a few minutes, it would usually start again and run for a while. Tried replacing everything, and I mean everything, but, in the end, it ended up being a worn cracked distributor cap. Replace this first and you may save yourself a bunch of dough.
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Sunday, April 20th, 2008 AT 10:26 PM