Need some help,
On a brief practice flight I observed the manifold pressure drop from 20 to 0 while adjusting the prop. It dropped fast enough the needle seemed to bounce off the peg. Almost as quickly, I realized I was still making power, so the flight home was uneventful, but the needle didn?t budge.
From reading through several manifold pressure gauge threads, this doesn?t seem to be the typical way a Van?s gauge fails. They either peg high or gradually begin to read low. Perhaps this is so obvious no one would ask.
The ground and power connections at the gauge appear to be intact. Despite the usual contortions, I haven?t even been able to eyeball the sending unit that must be there somewhere.
Where would you start? Here's hoping no one says sending unit??
On a brief practice flight I observed the manifold pressure drop from 20 to 0 while adjusting the prop. It dropped fast enough the needle seemed to bounce off the peg. Almost as quickly, I realized I was still making power, so the flight home was uneventful, but the needle didn?t budge.
From reading through several manifold pressure gauge threads, this doesn?t seem to be the typical way a Van?s gauge fails. They either peg high or gradually begin to read low. Perhaps this is so obvious no one would ask.
The ground and power connections at the gauge appear to be intact. Despite the usual contortions, I haven?t even been able to eyeball the sending unit that must be there somewhere.
Where would you start? Here's hoping no one says sending unit??