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Old 2 Weeks Ago   #1
Join Date: Apr 2021
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Italy 
Tjet 120cv OEM LPG Problem

Hello guys! I’m having problems with my Tjet tipo.
It started randomly misfiring and giving out the “P008BGAS RAIL PRESSURE” error when on LPG, so the LPG pressure regulator and LPG sensor were changed and that solved the misfiring but the P008B keeps popping up.
Now it misfires sometimes on cylinder 4, and rarely also on 3, when on LPG.
It also stutters when on WOT around 3000RPM and sometimes below that, pulls strong above 3000RPM.
Below 3000RPM sometimes the engines pulls and pulls slightly like an elastic, for example when on 1/2 throttle.

Changed parts: Pierburg solenoid, oil vapour canister, blow off valve, spark plugs, tried switching coils when it misfired for the pressure regulator, haven’t tried again.
What could be causing the P008B error and the misfiring?
All filters have been changed multiple times.
What could cause the weak spot around 3000RPM and the non linear power output?
I have Multiecuscan on iOS but it doesn’t appear to have all the parameters you get on a PC.
I don’t know how to start diagnosing, especially the LPG pressure error

Thankyou !!
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