95 F150 It started missing and bucking at speeds over 35. Happens mainly going uphill or towing, on flat road only when hard acceleration. Under 35 it runs perfectly. In park when you step on the gas no miss either. Sometimes it seems to be firing as the exhaust valve is opening
codes were EGR and oxygen sensor related.
engine off codes
172
176
177
332
engine on codes
136
326
Thanks for any help.