1990 Honda Civic rough idel and dead cylinder
My 1990 Honda civic 1.5 is driving me nutts. It idels rough and when you pull the #2 spark plug wire it does not change the idel or anything. I put a full tune up on it, it has spark on all wires, compression is great on all holes. When you get the rpm's up it smooths out and runs great. I pulled the #2 plug wire off at a high rpm and it studered a little. Checked every thing I can think of. I got 355 miles per tank before and now only get 315. Please help. Car only has 135000 miles on it.