This method always shows up a fault regardless of any other readings or setting
Breaking down the engines vacuum into a neat waveform that instant ly shows issues with the engines mechanical state.
This is one of our first ports of call with most engines,along with exhaust pulse which is the first step followed by the vacuum analysis.In this case the valves are clearly at fault.Numerous items had been replaced trying to fix this problem,head off and the valve seats corrected
exhausts number 1 issue is succumbing to rust and eventually blowing and falling off
Regarding engine running issues,exhaust blockage either in the catalytic converter or the exhaust silencers will strangle the engine.
The easiest test for this is using a vacuum gauge,easy quick and doesnt involve taking out o2 sensors to check back pressure
cars tend to become a part of us.
Our kids grow up with them,us along with them.Gradually the car reaches a certain age and things start to wrong at a much higher rate.
well if it isn't rot it can all be repaired,its a question only you can answer,so the car isn't worth the cost of repairs but that is your choice
A modern engine as a myriad of sensors that can all fail and are all vital
The coolant sensor is a vital unit giving the ecu the information it needs to set the correct fuel mixture or in other words the choke
Lunar auto diagnostics