Engine Misfire at Altitude.

JimC · #1 11-18-20, 03:22 PM

I'm still ROP. I haven't upgraded *anything* yet - I don't have an engine monitor, and I have the plugs, wires & mags that came with it when I bought it 4 months ago. It does run well LOP at 13K or so.

I ran a different continental TSIO up to 25K smoothly with pressurized mags, so I know that the pressurized mags make a big difference.

PS - How do you have a 1969 T337G? The model number & year don't match.

B2C2 · #2 11-25-20, 01:42 PM

Oops, sorry its a T337D. edited my below post to reflect this

B2C2 · #3 02-01-21, 07:49 PM

I was thinking about this and was wondering how Cessna gave a service ceiling of 30K feet for the T337D. With non pressurized magnetos this seems unattainable. Did they offer these as an option on the plane when they sold it? otherwise it seems like there is no way to achieve that altitude in operation.

Dan schultz · #4 02-01-21, 09:12 PM

Try the fine wire plugs

Dan
67S

B2C2 · #5 02-01-21, 10:54 PM

I have them. I actually have good performance up to about 19K but I have never taken it up any higher than that, Based on what i have been reading 30K feet without pressurized magnetos seems a stretch, but maybe that's not the case?

Dan schultz · #6 02-01-21, 11:03 PM

The Piper Aerostar’s that I used to fly did fine with the fine wire plugs to 25K. We did eventually put the pressurized option on. Now this was with the 1200 series Magneto’s, which in my opinion are a better mag than the 20 series or the 6300 series Slicks.

Dan