Is there something missing on my engine?
I assume you have felt behind the manifold to assure you didn't snap the new one off during the install. That's what happened on mine by a sponsor who has done tons of these. Or it could be just hanging there but still snapped off.
You will have zero pressure on the guage if the sender is snapped off.
To test the accuracy of the new one you might reinstall the old one - since you know the old one worked.





