Bit of a stretch for a timing problem to affect just one cylinder...

you'll get an error code

Yep thats the one.

I know the kit you mean, name eludes me at the moment but its an investment in itself. Need to pull a few injectors to make it pay.

Have heard of people using the chain blocks and home made adaptors to pull injectors out. Lot of messing though.

Interesting, would be good to see a physical compression pressure comparison.

You start by saying correctly that P0138 relates to the post CAT lambda, then we jump to the pre CAT lambda. I've no experience of the 4 wire denso wideband, it could well be the case - only you can confirm that with a part number. I would be suprised if the post CAT is also wideband though. Have yo...

Thanks Lee, will try that out.

Had more issues today with software hang ups. Was using secondary HT probe on CHA. Wanted to set up CHB to use elsewhere. Clicked the drop down to select 20v on CHB, and the software crashed. The scale for CHB only appeared after I unplugged the scope, at which point the software recovered. Plugged ...

If you've got 'known good' cars to compare with, why not take an injector waveform from each bank, on each car. If your problem car has a much longer injector dwell it would tend to back up the STFT data and low lambda's. Is 40 seconds long enough for a lambda sensor to warm up? Check it against a k...