Intermittent Miss

[Scoobywagon]

Got myself a bit of a head scratcher here.

 

The car is an 88 GL with SPFI. The engine runs strong under 3k. After 3k, it starts having a miss and the Tachometer starts jumping around. I lose a bit of power, but the car will continue to go. As soon as I get back UNDER 3k, the problem goes away. I did not have this problem until a couple of days ago. At that time, my water pump ate itself and though the engine got hot, I did not allow it to get into the red on the guage. The alternator also died at the same time, though it had been acting silly off and on for quite a while. I changed the water pump and alternator put the whole thing back together and got it fired up no problem. And now this.

 

I just checked the plug wires, cap and rotor. I found that the wires for cylinders 2 and 4 were corroded. I fixed that, started the car and checked it. Still have the problem. The rotor looks fine, but the contacts in the cap look a little boogered up. So, if I can find an open parts store tomorrow, I'm going to change the wires, cap and rotor. Anyone think of anything else I should check?

 

Thanks

Edited September 5, 2011 by Scoobywagon