Hello I have a Seat Leon mk1 1.6 16v with the AUS engine. It's converted to LPG. I have a problem where the car at idle missfires. I get the error code about random missfires and at cylinder 1,2. Also the egr system might have something wrong with it as well because I also have 2 error codes related to it: P0407,P0403.
So i took it to a mechanic and he changed all the spark plugs. It didn't fix the problem. Same thing. Missfires. After that he change 1 of the 4 petrol injectors. I left with the car running fine only to come the next morning on a cold engine and continue the same thing again. This time tho no flashing check engine light. But I could feel the car struggling running in 1 less cylinder. Also I tried to switch it to lpg and it stopped and right after turn it back to petrol and it begun again. But the problem is that when I ran it on lpg I get these weird sudden cuts of power when I press the throttle. Especially in lower rpm. I thought about cleaning my petrol injectors or changing all the ignition coils.
So i took it to a mechanic and he changed all the spark plugs. It didn't fix the problem. Same thing. Missfires. After that he change 1 of the 4 petrol injectors. I left with the car running fine only to come the next morning on a cold engine and continue the same thing again. This time tho no flashing check engine light. But I could feel the car struggling running in 1 less cylinder. Also I tried to switch it to lpg and it stopped and right after turn it back to petrol and it begun again. But the problem is that when I ran it on lpg I get these weird sudden cuts of power when I press the throttle. Especially in lower rpm. I thought about cleaning my petrol injectors or changing all the ignition coils.
