I have a 92 Si. I bought the car in May. At the time of purchase, the car ran well, As the summer progressed, the car steadily ran worse and worse to the point that I couldn't hardly get it around the block. I did a general tune up(cap, rotor, wires and plugs) but this did not seem to make a difference. We tried to set the timing but we could not advance the distributor any where close enough to get the timing set. We then did a compression check and realized that one cylinder was quite a bit down on compression. We took off the head, checked the piston ring clearance, ground the valves in the weak cylinder, adjusted all the valves, got a new timing belt and put it back together. After we put it back together, we couldn't get the timing set properly so we decided to tear it down again and advance the cam 1 tooth. This seemed to make quite a difference. We were able to finally get the timing set correctly with the distributor advanced as far as it can go and the car ran much better but seemed to be a bit down on power. But now it seems to run very rich. I pulled the plugs out and they are black as coal. We are considering advancing the cam one more tooth but I am afraid to do so and risk the valves contacting the pistons.

Is there something that we are overlooking? Any suggestions on how to resolve this problem? is there something that I am forgetting? Any help would be greatly appreciated.

Geoff

 

Anyone... Buehler.... anyone....

 

Damn, this forum moves fast....

Bump

 

One more time....

 

Maybe I'll try another forum...