Donald Wetzel
Daily Driver
Running dual DCNF's, Vick's electronic distributor, their recommended coil, original Marelli alternator (just trying to include what might be relevant)......
Issue 1: A miss at idle and high rev-zero throttle coast. While tuning with a Gunson (AWESOME instrument), I found that #2 is a very bad miss at idle. No, I didn't run a compression test yet.....but it is weird, runs and fires fine above 2000 RPM.....the miss is only at idle. Tried swapping plugs, wires, inspected the cap for cracks, made sure it's getting fuel.....it is only at idle. Idle voltage at idle is a hair below 13 at the alternator.
The throttle "coast" is hard to explain.....watching the Gunson, snapping the throttle from closed to open to closed I'm going "missing but blue-barely yellow on throttle opening-back to missing on coast".
I should have taken a video with the Gunson.....it showed a lot clearer what Im trying to say here.....
Issue 2: A "weak" accelerator pump shot on one of the Webers. One acts properly, a nice clear shot, no drips....the other throws me a raspberry and dribbles slightly. Changed the accelerator diaphragm, new pump jets on both carbs, made sure both inlet from the fuel bowl and outlet to the jets is clear, and the demand valve is not plugged.....
The worst/best part is......it runs and pulls like a BEAR, pulls hard til 6500 (as far as I'll risk it), sings that lovely Weber song getting there.....a (very) informal 0-60 of maybe 8.5 or so........it's these 2 little issues that are stumping me....
Issue 1: A miss at idle and high rev-zero throttle coast. While tuning with a Gunson (AWESOME instrument), I found that #2 is a very bad miss at idle. No, I didn't run a compression test yet.....but it is weird, runs and fires fine above 2000 RPM.....the miss is only at idle. Tried swapping plugs, wires, inspected the cap for cracks, made sure it's getting fuel.....it is only at idle. Idle voltage at idle is a hair below 13 at the alternator.
The throttle "coast" is hard to explain.....watching the Gunson, snapping the throttle from closed to open to closed I'm going "missing but blue-barely yellow on throttle opening-back to missing on coast".
I should have taken a video with the Gunson.....it showed a lot clearer what Im trying to say here.....
Issue 2: A "weak" accelerator pump shot on one of the Webers. One acts properly, a nice clear shot, no drips....the other throws me a raspberry and dribbles slightly. Changed the accelerator diaphragm, new pump jets on both carbs, made sure both inlet from the fuel bowl and outlet to the jets is clear, and the demand valve is not plugged.....
The worst/best part is......it runs and pulls like a BEAR, pulls hard til 6500 (as far as I'll risk it), sings that lovely Weber song getting there.....a (very) informal 0-60 of maybe 8.5 or so........it's these 2 little issues that are stumping me....