Mentioned this one on a Monday live session a week ago customer stated one morning wouldn’t start. No warning lights Scanned no codes, Carried out basic checks, had spark and good compression, had fuel pump priming and was petrol. Crank and cam synced up, rpm sensor reading. Battery good Further diag ; had 5 bar pressure at the fuel rail, scoped the fuel injectors and found a very strange wave form, pics below. Thought maybe a poor ground maybe be the issue as it looked to be roughly right but a lot of interference in the wave form. Noticed the ground cable from the top of the gearbox and been replaced with what looks to be a very cheap strap that I wasn’t happy with. Replaced this for a decent one and cleaned the contact points as were a little corroded. Wave form didn’t improve but was much more repeatable as before wave forms were was some intermittent. Checked a wiring diagram, goes from PCM through one connector to injectors. Removed all connectors all okay, tested voltage all okay. Had a LKQ remotely plug in as i found it unclear with the autel if maybe the immobiliser was stopped it from starting, apparently it’s all okay. No updates No codes All modules have comms There was one bulletin for a software update but the vehicle was too old for remote updates I remember we talked about checking 5v outputs from a modules to see if they had gone down haven’t checked this yet but it’s my next check. Otherwise everything is pointing towards PCM. Anyone have any thoughts? Pic 1 injector wave Pic 2 pico supplied known good

The method we spoke about on Monday live

Not sure if everyone see last nights post??

Came in with EML on and P040100 EGR insufficient flow. Found a TSB on DDTSB for this fault and gave some know good and bad readings to check at the EGR plug. Pin1 5v feed. Tested at 5v Pin2 should be 3.6v Tested at 12.3v Pin3 Ground Tested 0v Pin 4 empty Pin5 0.8v. Tested 0.6v Pin6 4.3v Tested 12.3v Bad EGR pin 2 0v Pin 5 0.6v Pin 5 tested the same as the bad data but its pin 2 & 6 as they are twisted so that indicates CAN lines to me. Also scoped and no waveforms at all Same voltage when it’s unplugged and when running Pin 6 goes with to whatever the battery is charging at. When left with ignition on engine off it will all by itself drop to around the correct voltages then spikes up to 12v again Code clears out and reading are still the same Pin 2 & 6 go to the motor according to Alldata Unfortunately customer had to take the van today but is rebooked for next week and my next step was to voltage drop test and load test the wires I suspect possibly a short to ground but any help/ advice would be appreciated as I could be scratching my head on this one!

I loaded a new video last night to the case studies,did anyone get a notification??