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On the Detroits cylinder head ports can become clogged with carbon,kills power. If yours has shut off valve to kill engine,make sure it is closing /opening all the way. Check throttle linkage. The 6v-92 and 8v- 92 engines have both supercharger that is between the banks and turbocharger. Make sure they are functioning. Check fuel lines and as others stated the filters are first thing you look at. I would check the quality of fuel in my tanks,especially an old tank. I have seen contaminants in a saddle tank suck up against the outlet port and shut vehicle down. Once the motor quit and the fuel draw quit the contaminants floated away,only to start the process over when you drove/started it again.
Good luck. |