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Ah yes, the crack in the manifold. The crack developed in the top of the stock cast iron manifold. it was hidden from inspection by the turbo. The crack is big enough to see light shining through it. I have pictures but I can't seem to make it small enough for the list.
Dave Leonard
Dave, Bad news and great news. Cannot help with the potentiometer or board, but can you give more details re the crack. Just where did this happen on the manifold? Neil. Hi All, I have just completed an engine rebuild. This issue was caused by a crack in the T2 exhaust manifold that melted a coolant line and a fuel line, causing an engine fire. I landed safely and had to rebuild the engine because the o-rings melted from the coolant loss. Im trying to get the new engine running again. Compression is great, spark is great and I have triple checked the timing. I am getting some amount of fuel but no combustion. I have narrowed the problem down to a few possible issues. During the rebuild I replaced the 5ohm potentiometer that controls the mixture because the knob was broken off. So I possibly mis-wired the replacement potentiometer, it is not actually compatible, or I damaged the board when I trimmed it to allow the new one to fit. I wonder if anyone has one lying around I could borrow to test this link in the chain.
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