Mine is still doing this after changing the head gasket, I have check again and again for vacuumm leaks. However, I still believe this is my problem.
Now keep in mind, I did replace my o2 sensor, but it was not the correct one. Also, I replaced everything that goes along with it:
Plugs, wires, rotor, dis. cap, cleaned TB, fuel filter, oil & filter, all belt (timing, accessories), flame trap, and water pump, gaskets, and hoses. I really believe I possibly did miss some vac hose, but can't find it.
I think the vac lines may be your problem also, especially if you replaced some near or around any vac hoses.
Kevin
1990 740 GL Rex 216
1997 960 126K
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