How do you know it's a Piro as the label on the ECU says Dream XXI P. Is that what the P stands for?
Does that mean the cable that I bought from Tinley Texh is incorrect (the connector on the cable fits the ECU). Edited - yes it's a Piro cable I bought.
How does one calibrate it?
Is the Vaporiser big enough?
That is what the P stands for, also it's a different shape ECU.
Hehe so yes you have the correct cable, different plug on it to other systems anyway.
Vap is certainly capable enough.
We don't know if any parts fitted are not working properly yet though...
Best advice on calibration, don't tamper with any settings for now! Let's presume it was running OK with calibration set how it is now but some other fault caused the problem you're seeing. Best to use the software only for looking at readings and settings... Don't run a wizard, exit a wizard if one automatically starts.. Just tell us what numbers are on screen for manifold pressure, gas pressure, reducer temp, gas temp, if rpm reading matches tacho. Do that lot while engine is idling and again when engine is under moderate load (60mph on flat in gear), if you have an OBD live data reader that you can use to note and tell us fuel trims from under both conditions so much the better (and you'd be advised to have one if you go on to attempt calibration anyway). In the 'map' screen click on Bank1 then click on Bank2, lot's of numbers in each, numbers should be similar between bank1 and bank2, numbers in both should get smaller towards bottom of screen...?
If it does need calibrating - Even if this were a new system with all known good parts, would really be best to let a pro familiar with Piro calibrate it. Further advantages on your old system would be such pro would know how to ID faulty/worn components and somewhat address the 3000rpm issue. Piro was/is a work in progress that will never be finished, the 'P' was supposedly to supersede 'N' type systems like OMVL Dream XXI N, Romano RIS N, but wasn't as good as the former (which are more common, still produced and still developed). It has quirks including combinations of software and firmware that won't work properly or at all together. Some software versions have a wizard that supposedly takes you through the setup process after which 'job should be done' but isn't by a long shot, other versions of software don't have the Wizard... Possible to describe calibration but a lot of iffs and buts to handicap attempts, particularly to describe to someone not familiar with calibrating other LPG systems.
There can't have been that many installers fitting Piro on 4.7 Jeeps, I might even have fitted this but haven't recognised my work from the pics you posted (tend to think I didn't). Dai (Classicswede) might know better about numbers of Piros on 4.7 Jeeps (worked for supplier of this system back in the day) than me. Would be interesting to see a zoomed out view of the install and ask Dai how many Piro's he reckons are fitted on 4.7 Jeeps..
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