Help! We just bought a beautiful 91 GTA for our son. Our mechanic checked it out and felt it was sound. The problem is that it runs rich and surges while driving. No engine lights come on and when doing a computer check, no codes come up.
I know the oil pressure regulator has been replaces and a few other things to try to fix the problem. Has anyone had this problem and if so, how did you fix it?
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