My car would not start for 2 weeks, no spark at all. I finally figured out it out ( with shoebox's website) that it was the ICM, and bam, fires right up after I replace it! Runs like a champ for a day or two, and now when it's under load ( read: 1500 or so rpm in 4th gear) and I give it gas, it starts chugging really bad? Almost like it has a dead cylinder? If I floor it in first going 5 or so mph, it runs perfect. And it seems to idle really well too. It just started doing this on my way home from dropping some people off tonite ( the car was warm ), so I'm going to test it tomorrow right away when its cold. Anyone have any ideas?

 

Replace the plugs, they might be fouled.
The plug wires, they may be arcing.

Definitely sounds like ignition or fuel pressure.

 

Interestingly enough, when I started it this morning, it runs perfect. I took it around the apartment complex 2 times, putting it into heavy load with 3rd, 4th, and 5th gear and flooring it, and it responds normally. I'm going to inspect my spark plug wires ( I had one burn up on me because of the headers ). I will report as soon as I figure out the solution!

Note: I'm going to use the ICM cooling mod also, to see if that has any positive effects.