Won't run smoothly on 1995 GMC Jimmy

Starts but will not run smoothly, wants to shut off, cannot get over 30mph, was rear ended several months back, body is repaired but now doesn't want to run, struggling to get fuel?

2 answers 1 comment
If the prob started after the accident I would inspect the exhaust system to see if its pinched or collapsed somewhere
Thought there might be a fuel cut off switch that was activated?
I am having the exact same problem with my 96 GMC 5.7. Parts replaced and thrown at it with no sign of improvement: plugs, wires, distributor cap, rotor, can shaft position sensor, crank shaft position sensor, coil packs, coolent temp sensor. fuel pump, EGR, Ignition control modual. It does not have cats as it is an after market exhaust and cats have been removed. Fuel pressure guage reads 60 psi, What is left?