I have an 89 with the 6 cylinder engine. Recently, I have noticed when I shift from 2nd to 3rd, it will immediately bog out and must be shifted down to 2nd. Eventually, I can shift to 3rd, but, again it will bog completely down like it has lost power in all cylinders when shifting to 4th.
It idles fine and starts out in low fine. I am thinking it could be the fuel filter, fuel pump, or electrical, such as the ignition module. Sunday morning it was particularly difficult. It had rained all night.
Any suggestions are appreciated. I may check the fuel pressure first. Has anyone had this problem?