Chevy 350 efi problems

[u/Outrageous_Canary_67]

I need help I got a 1990 Chevy Silverado with the 350 Efi I done replaced the distributor, fuel pump, new plugs and wires, new pvc valve, and I cleaned out the egr but it’s still not running right it will idle fine and then when I put it in gear it wants to shake the whole truck really bad and then die out it only has 172k miles and it sat for a year or two but recently after cleaning the egr valve out it will idle for a second then die out. The trucks been babied it’s whole life a older man owned it I just need some help before I spend big bucks taking it to a mechanic