In the last few days my Vectra has been having this problem.
Car starts fine, then ticks over a bit low, maybe about 800 rpm (normally 1k rpm).
I press the accelerator to try to rev it and it creeps up the revs to about 2k rpm.
After doing this a few times the engine picks up and rev's normally and continues to do so for the rest of the journey.
Yesterday i did the 3rd injector mod with the new connector but it didn't cure it.
I'm tempted to get 4 more of the kits and redo all 4 injector plugs.
Or i was thinking this sounds a bit like a sticking EGR valve?
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