blaplante
Well Known Member
Having just installed a JPI monitor on my 0-320-h2ad (with Bendix FI), I started up today to check that all is working. I got some odd results - at idle, the EGT for #3 is MUCH lower than the other 3 cylinders. (Like less than half). As the engine was still pretty cold I don't have much info on CHT.
So, increased to about 1400 rpm. All 4 are sitting around 1100 degress CHT (I had leaned some after start). OK... back to idle. #3 went back to a quite low EGT. Repeated with the same results.
Eh? What's going on here? I doubt this is a probe problem given the temp difference changes with rpm.
Engine has about 260 hours (and 0.1 monitor time).
Some searches raised multiple theories:
low compression - was AOK at last annual, not many hours ago.
stuck/sticking valve
bad lifter or rocker on intake
bad valve spring
intake leak
Thoughts?
Thanks!
So, increased to about 1400 rpm. All 4 are sitting around 1100 degress CHT (I had leaned some after start). OK... back to idle. #3 went back to a quite low EGT. Repeated with the same results.
Eh? What's going on here? I doubt this is a probe problem given the temp difference changes with rpm.
Engine has about 260 hours (and 0.1 monitor time).
Some searches raised multiple theories:
low compression - was AOK at last annual, not many hours ago.
stuck/sticking valve
bad lifter or rocker on intake
bad valve spring
intake leak
Thoughts?
Thanks!