Vapor Lock in a 302? - Ford Truck Enthusiasts Forums

Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Vapor Lock in a 302?

Reply

 
 
 
  #1  
Old 05-07-2011, 01:54 PM
1stgenf250
1stgenf250 is offline
New User
Thread Starter
Join Date: Aug 2010
Posts: 4
1stgenf250 is starting off with a positive reputation.
Vapor Lock in a 302?

Having problems with an 87 F250 with a 302. When it's warm out the truck will run fine for about 20 - 30 minutes then it will stall. Changed distributor, coil, and computer. Does a 302 have vapor lock issues? Fuel pump maybe? It doesn't matter which fuel tank I run on, the problem persists.

Thanks,

Daryn
 
Reply With Quote
  #2  
Old 05-07-2011, 02:09 PM
khadma's Avatar
khadma
khadma is offline
Carpenter Local 745
Join Date: Apr 2006
Location: on da beach
Posts: 5,246
khadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant future
You may have in tank fuel pump issues, these low pressure pumps fail often.
 
Reply With Quote
  #3  
Old 05-07-2011, 02:45 PM
1stgenf250
1stgenf250 is offline
New User
Thread Starter
Join Date: Aug 2010
Posts: 4
1stgenf250 is starting off with a positive reputation.
Originally Posted by khadma View Post
You may have in tank fuel pump issues, these low pressure pumps fail often.

how possible is it for both low pressure pumps to fail?
 
Reply With Quote
  #4  
Old 05-07-2011, 09:34 PM
96onefifty
96onefifty is offline
Senior User
Join Date: Mar 2007
Location: Rochester, Pa
Posts: 269
96onefifty is starting off with a positive reputation.
Does it fire right back up or does it have to cool down first? sounds more like the Ignition Module located on the bottom side of the distributor to me.
 
Reply With Quote
  #5  
Old 05-08-2011, 07:08 AM
1stgenf250
1stgenf250 is offline
New User
Thread Starter
Join Date: Aug 2010
Posts: 4
1stgenf250 is starting off with a positive reputation.
Originally Posted by 96onefifty View Post
Does it fire right back up or does it have to cool down first? sounds more like the Ignition Module located on the bottom side of the distributor to me.

I replaced the ICM when I rebuilt the distributor. It does have to cool down before it will restart though.
 
Reply With Quote
  #6  
Old 05-10-2011, 02:18 AM
khadma's Avatar
khadma
khadma is offline
Carpenter Local 745
Join Date: Apr 2006
Location: on da beach
Posts: 5,246
khadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant futurekhadma has a brilliant future
In the 90s my 88 F150 with the 302 plus dual tanks had the same issue.
I replaced all items related to the fuel system. FPR, relays, filter, Hi Press fuel pump and finally the intank low press pumps.

These pumps were easily damaged by water in the gas tank.

These LP pumps would build up enough fuel pressure to feed the HP pump, but
the lack of volume from the LP pumps would cause the truck to stall.

It may not be your problem, but it is something to look into.

And yes, both pumps failed at the same time.
 
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
joesluckyseven
1987 - 1996 F150 & Larger F-Series Trucks
15
07-27-2014 05:51 PM
jarheadd87
1947 and Older Ford Trucks
4
11-11-2013 09:40 AM
elkhunter
1973 - 1979 F-100 & Larger F-Series Trucks
14
08-03-2012 09:07 AM
eriklane
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
9
01-31-2011 10:29 AM
AbandonedBronco
Ford Inline Six, 200, 250, 4.9L / 300
24
10-12-2009 12:17 PM


Thread Tools
Search this Thread
Quick Reply: Vapor Lock in a 302?


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

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.