wence;
Remove the cup holder from the dash and uptape the OBD II plug. Using an automotive OBD II handset look at the other engine sensors along with the MAP sensor that you cleaned. If all sensors are reporting good check the LPG fuel pressure for 4,6 - 4.8 psi. When was the fuel filter at the lock - off last changed and when was the fuel filter inside throttle last cleaned. Also has the tar been drained from the vaporizer/regulator at a regular basis. Check to be sure the fuel relay is making with key switch on and not activating only in starting mode. While checking relay also look to be sure the relay mark EGI is making. Check the injector driver for condensation under the plug. Driver is located next to the ECM under the battery.