Here I have my '86 MM, recently I completed what I've been calling a re-ring and re-seal of the motor. I had previously swapped to a Weber 38dges and while it did run rich before the rebuild It never fouled the plugs. Granted I only had about 1000 miles with the weber before I blew the head gasket. Now it coughs and sputters to the point where it's undriveable. I did change my exhaust by putting a header and full 2.5" exhaust, it has a cat and muffler in line. I feel like that is what is causing it to run like this because it will idle fine but once you try and give it gas it suddenly is upset at you.
I had been messing with smaller jets because the plugs had been pig rich but those actually made it worse.
It had 55 idle jets but I dropped those to a 50 and it idles nicer
So i returned the carb to how I got it and the jets are as follows
145 Main Jets
170 Air Corrector Jets
50 Idle jets
I haven't looked at the accelerator pump jet yet so that might be causing it as well as it seems to do it any time I try and give it more than a minuscule amount of gas.
If anybody has any input or is running a similar setup I'd love to hear from you, thanks for your time.
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