66 F100 running issue - Ford Forum - Enthusiast Forums for Ford Owners

66 F100 running issue

Old 04-23-2018, 10:49 AM
Junior Member
Thread Starter
Join Date: Apr 2018
Posts: 2
Default 66 F100 running issue

History of truck...It's a 1966 F100 with an early 70's 302 4bbl with a small block C6. Was not running when I got it, hadn't been driven in years. I Rebuilt the Holley 650, replaced the distributor with new,points one and new cap, rotor and plugs, replaced oil pump, replaced fuel pump and all rubber fuel lines, added in-line filter and cleaned fuel tank and all metal lines. Started up great and ran fine for the first couple of days. All of the sudden it began to act like it was starving for fuel after it the engine got warm. It would sputter for a short period and then die. It would start right back up so I don't think it's a vapor lock issue. Some times it only takes @ 5 minutes for this to happen, sometimes it can be driven for 15 - 20 minutes before it happens. The strangest part is, if driving it acts as though it's starving for fuel and sputtering and then all of the sudden it's running fine again. after it happens the first time it keeps coming and going. Any suggestions?
Old 04-23-2018, 07:02 PM
Senior Member
Join Date: Jun 2010
Posts: 8,805

I don't know if this is the problem, but the needle and seat that the float controlled was not always made to withstand unleaded fuel and would swell and give the symptoms of an erratic float level or low float level because it shut off too soon.
Worth looking into, what do you think?
Old 04-23-2018, 07:21 PM
Junior Member
Thread Starter
Join Date: Apr 2018
Posts: 2

Thank you for the input, it certainly seems like a fuel issue but never considered this. I'll check it out. Thanks again.
Related Topics
Thread Starter
Last Post
Ford Escort
03-10-2014 02:50 PM
Ford F-150
03-02-2012 10:03 PM
Ford Ranger
05-16-2011 06:50 AM
Ford F-250 & Ford F-350
03-25-2008 02:12 PM
Ford Explorer
11-27-2007 03:59 PM

Thread Tools
Search this Thread
Quick Reply: 66 F100 running issue

Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.