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91 4.9 starts then dies right away

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Old 08-16-2014, 04:58 PM   #1
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Default 91 4.9 starts then dies right away

some times it starts and runs for 5 minutes or so but it runs very rich. i replaced plugs wires cap and rotor. intake gaskets. fuel pressure regulator. i just tested the fuel pressure and it runs right around 45-50 psi. i am at a complete loss on what to do next. i can't read the codes because the previous owner butchered the wiring i guess. SOS
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Old 08-16-2014, 05:13 PM   #2
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The best way would be to try and get some codes but if you can't it'll just be a bit harder. Have you checked how the intake valves are adjusted? What's your compression at? If its running rich that means there's not enough air with the fuel. I would start there next before I replace anymore stuff.
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Old 08-16-2014, 05:13 PM
 
 
 
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