Thread: 350 issues

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Well – first let’s have a cup of coffee! It sounds like you may have several issues and they need to be diagnosed/healed one at a time.

First, I would echo the fuel pressure recommendation, i.e., get it down to 5 PSI.

If you don’t have the Holley manual, download here: http://www.holley.com/data/Products/...l/199R9881.pdf

The 4160 has a lot of connections. All of them need to be either “connected” or plugged. Refer to the picture below and make sure that you have everything hooked up correctly. Pay careful attention to numbers 3a, 4, 7a and 7b - if you’re not using them, plug them. Also #5 is the only port the PVC should be connected to.

Unless you have one “killer” cam, your vacuum needs to be higher. Would hope you have at least 17 inches at idle, 20-22” is better. Measure your vacuum at 7a. Your current reading tells me there is a vacuum leaks or something open somewhere.

Give this a go and let us know what the results are.

Good Luck,
Glenn