Hello guys, I need a technical advice. my car (Volvo S60, 125 KW, BJ 2005, 58000 KM, of which 35000 on LPG) has recently started off badly. I thought that I found the error because a ignition coil on the 5th cylinder was defective. But that only minimized the problem, but not completely fixed. The car starts better with the new ignition coil, but still not well. The starting process is as follows. After the starter spins a few times, the starter jumps a few times. If I turn it off in D (it’s an automatic), it’s already dying off. Now I was with the friendly one today. They checked the candles (they’re new, they’re not 1000 km) and found they’re crazy, which would indicate too high a combustion temperature ( hilarious, I always thought, then his contacts glowing white). Anyway, you measured the compression. And look, cylinder 1 – 3, compre This is a funny thing, of all things the cylinder with the new ignition coil has the best values. Be a coincidence, the friendly one. And now the friendly one. That would be on the gas system (Prins VSI). The run probably too lean or too fat (real smart). But you can not check there. Or I had driven without FlashLube (is also installed). One has to rework the cylinder copper. Cost approx. 3000,- Euro. Somehow I don’t trust the roasting. I did not trust the roasting. e read that the compression in Ottomotoren idR is not the cause of start problems. But the friendly one saw this differently. Hmmm. Who should believe there. I also read, compression should be tested with warm engine. My idea is the following. Through the new ignition coil on the 5 cylinder this candle just ignites better. The other 4 ignition coils are just a little sluggish on the chest. (Zündspulen should be burdened more strongly by the gas operation). The oil film has been better sealed there. The neighboring cylinder has also been heated more strongly, which is why it also has comparable better values. And cylinder 1-3 did not get anything. Can that be? What do you do? I think I will go to a free workshop and let it measure compensation once more. Does that make sense? LG Lothar PS. The same contribution is also available in the forum Gas Fuels