4 th Gear sputtering
Ok I have an 89,4.2, MC2100, 5 speed, hei distributor, SOA w/ 4.10 gears. The problem is when I shift into 4 th gear the motor seems to start sputtering although it is at 2000 rpms after shifting which is the same rpms as the other gears after shifting. Does anybody have any ideas what to check?
I have adjusted the timing from 10-14 BTDC and have adjusted the fuel mix to max vacuum and then some with no real changes. It's not the clutch because the motor just seem to be sputtering. I have also adjusted the vacuum advance which is run straight off the manifold. The only other thing I can think of is maybe the jets in the carb need to be changed. what do you guys think?
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