1. demand 75% utilization from everyone in delivery. That means 75% of a 40 hour week is billed to a client.
2. If your PMs are happy then the client is happy, if the client is happy then the project is fine. Talk to your PMs often.
3. Bridge sales and delivery with a liaison who has a foot in each department. Give them the authority to tell sales to STFU and also to tell delivery get it done or else.
edit back to #1 a billed hour is your only source of revenue in consulting. Further, there are only so many hours to sell. Do some math and let that guide you in project decisions.