Moin Leude! Since no workshop can help me anymore, I hope that one of you has a solution. The following problem: -I start my 91er Buick Park Avenue 3.8V6 TPI. – about 10 seconds is everything OK – Then it only runs on 5 cylinders – Problem child is always only the 2nd cylinder. – after 3 to 6 km drive this 2nd cylinder still decides to work – then everything goes well until I put the bowl down. – whether cold or warm start – at the next start The procedure starts from the front. Work already done: – new petrol filter – new ignition – new ignition cable (all tested > OK) – petrol system cleaned – new AC-Delco spark plugs (also already exchanged) – all injection nozzles ultrasonic-cleaned and exchanged – new injection nozzle plug for the second cylinder – all contacts cleaned The box does not run round at first, although the candle ignites, the nozzle cleaned, and the control cable provides signal. H from even the ignition cables exchanged between each other – so I changed everything to exclude defective parts. Nevertheless, only the second cylinder makes bitches. And after a few minutes drive everything suddenly works perfectly again. I now put out a reward for the one who can solve the problem (n’Kastn Bier ? …) it greets, Jürgen