lauraghost9
C8 Intake Manifold Flap Issue
Summary of the thread
A 2002 Citroen C8 diesel is experiencing reduced engine power, rough running, jerking during acceleration, a loud hissing sound, and increased fuel consumption. These issues may be linked to a problem with the intake manifold flap control. After checking the air intake system and finding no obvious issues, a diagnostic assessment at a workshop confirmed the fault, leading to a repair that resolved the problem.
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4 comment(s)
lauraghost9 (community.author)
Thanks! I checked the air intake system, including the filter. I didn't see any problems. Could you tell me more about the issue you had, like any diagnostic steps or fixes? The mileage is 92772 km and I wanted to rule out any other possibilities before I get it checked at the garage.
aaronfire1
I didn't go too deep into the diagnostics. The symptoms were so similar to what others said about the manifold flap problem that I took it to a workshop. They plugged it in, confirmed the fault code, and sorted it. If you've checked the intake and there's nothing obvious, I'd get it diagnosed.
lauraghost9 (community.author)
Thanks for the help! I went to a workshop for a diagnostic assessment. The repair, replacing the switch, cost 465€. The car's running great now.
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CITROEN
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C8
aaronfire1
Crikey, that sounds familiar! I've got a C8 myself. It was doing almost the same things! Reduced power, terrible jerking... the hissing sound is new to me. Did you check the air intake? Maybe there's a blockage that's making it whistle?