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Old 09-03-11, 19:58   #1
gomezy
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Can air leak in AC/heater control unit cause the engine to run rich?

Hey guys,

Just got my VLT back from the shop, noticed a leak in the AC/heater unit & the car a bit rough, black smoke, running rich...
Could that be caused by the air leak in the unit? Oxy sensor etc.. seems to be oků?
Any feedback would be appreciated

Thanks in advance,
Lorensze
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Old 09-03-11, 22:22   #2
jordy
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as the air con switch uses engine vacuum, if it's leaking then you have a vacuum leak which will make the can run rough. It's not a massive diameter hose though, so if it's really obviously running poorly then you probably have another issue.
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Old 10-03-11, 06:33   #3
theVLguy
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On an airflow metered engine, a vacuum leak will make the engine lean, not rich
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Old 10-03-11, 17:37   #4
gomezy
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Thanks for the replys guys. Thats all it was, its all fixed now. Cheers
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