We had similar issue and replace the 2nd shut off valve for a latest design, also, we are testing one that has a 10mm hole to equalize pressure in one engine that is performing good also. So far we don’t have this issue any more.
These are the P/N:
We had similar issue and replace the 2nd shut off valve for a latest design, also, we are testing one that has a 10mm hole to equalize pressure in one engine that is performing good also. So far we don’t have this issue any more.
These are the P/N: