In-cylinder pressure test waveform interpretation

[Gladtojoin88]

Can you unhook the exhaust precat and see if it will rev up ? Only a few nuts if it isn't rusted out !

 

[clinebarger]

I have a Pico Scope & the Pressure Transducer kit....Been learning the ropes for about 6 months & have verified quite a few out of time engines with it.

When it comes to a suspected plugged catalyst....I go old school with my old Vacuum/Pressure gauge & adaptor I made out of a Anti-Fouler & Vacuum Fitting that screws into the O2 bung.

 

[agarb]

Replaced the catalytic converter. Van is back to running as it should.