Volvo RWD 444-544 Forum

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HS6: Front Carb low vacuum 444-544

Update:

Tried attaching a set of HIF6 carbs and the same issue. Linkages all disengaged.

Rear carb appears to be working just fine.

Sprayed to see if there was any increase in RPMs along the manifold. Nothing.

Valves are fine.

Thinking there could be a flow issue in the intake portion of the manifold? It's a siamese 4-2-1. Tempted to try another manifold or header/intake setup.

Doesn't seem like a carb problem if both sets show the same lower vacuum. This is a freshly done engine too. Good dry compression readings.

Help!






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New HS6: Front Carb low vacuum [444-544]
posted by  tommyt544  on Sun Jun 11 19:12 CST 2023 >


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