When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
i have a 66 f100 with 352. I am having a problem with the #1 and 6 cylinders not firing clean. can anyone help with this?
Is there oil or fuel on the plugs when you remove them?
What is the cranking compression? If that drops under 110psi I will not run very well. What is the compression difference between 1 6 and the others that are running better?
Vacuum Leak?
Could be you have some flat lobes on the cam too. Just pulled one apart yesterday with that issue.
How many miles on this engine?
What is the dwell reading if still running points? Point contact dirty or points bad? Plug wires ok?