I changed the engine in my is200 recently. The old engine was running on LPG but was converted back to petrol before i bought it. I changed the engine because it was burning a lot of oil. The new engine is running and driving perfectly. It started cutting out a week or so after i replaced the engine. Now it is starting but will cut out after few seconds. Ecu, ignition barrel, immobilizer and wiring loom changed. Cam and crank sensors cleaned. Fuel pump changed and all fuses checked. New key and battery also got. I got a garage to put it on the computer to see if any fault codes showed up but none appeared. Anyone ever heard of this problem before and if so how to fix it. Any help welcome. Thanks for reading