My son's 93 Z24, 3.1 is loosing acceleration speed on the highway.
He observered his catalytic converter glowing red about a month ago, so we assumed it was blocked and when we took it in to a muffler shop, they removed it. We were still having acceleration problems, so we have changed plugs, plug wires and now last night all 3 coils. He said it ran fine for about 150 highway miles, but now will not accelerate quickly, even with the pedal to the floor! His gas mileage has dropped as well. Any thoughts?
