Here is a Honda CRV Cranks but won't start.

This car was reported to have been running very poorly earlier in the day and then it stalled and would not restart. The driver reported adding three quarts of oil earlier (it only holds 4).

The initial testing confirmed that there was spark, and while there was an odor of fuel when cranking, that actually still needed confirmed, so alternate fuel was attempted and the engine didn't even attempt to fire.

The next step was to inspect the spark plugs and they were fouled black with soot. Conventional compression testing showed the compression in #1 to be 110PSI. We have to allow for the possibility of the cylinders to be washed down from too much fuel and no combustion so the pressure transducer now becomes the best next step.

Here is the waveform that was achieved. What do you think is wrong?

Here is a known good cranking waveform to compare

#Honda, #compression test, #Autotechtitude

#PICO,  #scope, #thecardoc, #cardoc