Mine flickers like mad. it shoots up to just under 3 bar at full pressure. I wouldnt worry about it too much even tough its annoying. Now the twitching fuel gauge, I want to fix that.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual