Check the fuel pressure: Vortech should be at the very least 55 to 60 PSI,
Key on engine off.
TBI: Minimum of 12 PSI key on engine off.
Check the EGR valve, and the EGR ports for large chunks of carbon, if the
valve is bad. Replace and use a Tomco/NAPA or Help products by Doorman, with
the screen in it.
I hope this helps.
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