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2005 with a 4.3 vortec on propane. Rebuilt top end now I have no spark. I have rechecked timing chain cam sensor crank sensor etc. Somebody told me there is an oil pressure safety switch apart from the stock 4.3 one by the distributor. Any truth to this? All help appreciated. Cheers
  • Posted 30 Dec 2015 10:19
  • By wally_v
  • joined 15 Dec'15 - 4 messages
  • British Columbia, Canada
It's your oil... it needs a new motor.

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From the forum discussions …
"Unicarriers - it would have to be for a dual fuel unit also. Usually a bad cam or crankshaft sensor will throw a E-27 or a E-28 code on the dash panel... If it does not light up and the bulb is bad then it will not start also."
mwjago, United States
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