That's a big problem on diagnosing the PSD. Many times they won't throw a code and you need the live info to diagnose it. I bought one similar early this year, spent around $300 thinking I was getting all the bells and whistles and it was a worthless waste of $300 to diagnose the cold start / no start condition I had that turned out to be a combination of a bad front timing cover/ lp oil pump and 4 bad injectors and 2 questionable injectors..... and wouldn't throw a code at all. As far as the puter was concerned the engine was in perfect operating condition.
Exactly codes on a PSD or any vehicle for that matter, only get ya in the right direction. to diagnose and repair properly you need the data , I have had countless psd issues that throw no code, or try to fix a 1211 code, there are 15 different possibilitys. with a good scanner(not code reader) I can sit in the driver seat, with the hood closed and tell ya why the truck wont start.
of course I just spent $2500 on a OTC genisis, but it does just about everything. I also have a otc4000 enhanced, it is good for up to 99. also had a snap on brick, it worked well, but no graphing and it was slow. also wasted 800 on an otc nemisis, works well, but only does codes and live data.
Granted I use my scanners almost daily, but without them I couldnt do the correct repairs, and verify that the repairs I did actually fixed the vehicle.
......... We'll check on ya in a couple days to see if yer eyes are crossed yet.
