Forum Discussion

D_E_Bishop's avatar
D_E_Bishop
Explorer
Apr 23, 2014

454 Chevy has low power and high gas usage/some help

My Bounder's engine started running bad a few years ago and at night you could see the leakage from the plug wires. Decided to have full tune up done. Many hundreds later I got it back and it still ...
RJsfishin's avatar
RJsfishin
Explorer
Apr 23, 2014
If your theory of "vacuum advance stuck in full advance" was correct, your 454 would detonated (pinged) itself to destruction.

If the hose was broke, or not connected, you would barely notice a little difference in mpg during hi maninfold vacumm conditions.

A malfunctioning centrifugal advance is the only thing that would maybe cause what you describe.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,259 PostsLatest Activity: May 30, 2025