Ford Truck Fanatics  



Home Gallery TOTM New Posts My Threads / My Replies Links Sponsors Calendar Arcade Calculators Fliers
Go Back   Ford Truck Fanatics > F-Series > Generation 5

Generation 5 1967-1972 F100, F250, F350

Reply
 
Thread Tools Display Modes
  #1  
Old 09-11-2016, 02:23 PM
68F1006.4's Avatar
68F1006.4 68F1006.4 is offline
 
Join Date: Aug 2016
Location: The Woodlands, Tx
Posts: 484
68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice
Questions Regarding My '68 390 F100

Before I get to the questions, let's start with a little info.

Based on what I was told by the guy from which I purchased the truck, it is a numbers matching original with me being the forth owner. He told me that the engine was pulled to put in new pistons along with an "RV" cam. It also has a Weiland single plane aluminum intake with a rebuilt and upgraded Holley 4160 4bbl carb, long tube headers (Hedman I believe), and an upgrade to a digital ignition very similar to the ignition system that was OE on the '85 5.0 Mustang I used to own.

I got to drive the truck for all of a week when I pulled into a station to get gas and the truck suddenly died while idling and wouldn't restart. After it did finally start about an hour later, it died again when I was about a third of the way home. After checking to make sure the carb was getting gas and that all electrical connections were good, it ultimately ended up catching a ride on the back of a wrecker.

Since then, I've replaced the fuel pump through Summit Racing after matching what was on the truck already, and I've also replaced the spark plugs, wires (Accel), magnetic pick up inside the distributor, and the coil (Accel Super Sport). I started pulling the carb apart a couple of weeks back and stopped at the metering blocks after realizing that what was put into the carb was already better that what was in the kit sourced from the local parts store.

I also have a FoMoCo ignition box to put in the place of the no-name box already in the truck, I haven't put the new box in yet because the wires are spliced in and I would rather utilize the stock style connections already on the new box. This combo of parts seemed to work great together so this gremlin is really throwing me for a loop.

I also must mention that the C6 3sp auto was also pulled for a refresh and shift kit when the engine was pulled. It does shift a little early for my taste, but I think it was done with fuel economy in mind.

So there it is in a nutshell. The truck has been down since March and I really don't have any intentions on selling it before I get a chance to really enjoy it the way that I like it.

Any and all questions and suggestions are greatly appreciated and I hope to get her back up again soon!
Reply With Quote
Sponsored Links
  #2  
Old 09-11-2016, 08:43 PM
cbaker65's Avatar
cbaker65 cbaker65 is offline
 
Join Date: Apr 2014
Location: Mcfarland,Calif.
Posts: 4,852
cbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond repute
Have you checked all the ground connections an including the ignition
switch?
__________________
CB

Im not a bum,Im on vacation!....
Reply With Quote
  #3  
Old 09-11-2016, 09:38 PM
68F1006.4's Avatar
68F1006.4 68F1006.4 is offline
 
Join Date: Aug 2016
Location: The Woodlands, Tx
Posts: 484
68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice
I checked and cleaned all ground connections that I could find and even improved some of the connections that were sketchy.

For some odd reason there was a cable going from the positive battery terminal to a bolt on the core support. While trying to start the truck, I spotted smoke coming from the positive terminal and the cable appeared to be melted so I removed it.
__________________
Bow low before God, stand tall before man, and stand firm in the gap.
Reply With Quote
  #4  
Old 09-11-2016, 10:31 PM
Fellro's Avatar
Fellro Fellro is offline
Ford Truck Fanatic Administrator

Moderator
Admin
 
Join Date: Jan 2007
Location: Iowa County, Iowa
Posts: 7,427
Fellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond repute
Are you certain that the cable was intended for positive? You can get replacement cables that are red and put on as a negative, so don't always trust that the color is indicative of polarity. I have had a few vehicles that if you did that, you would hook it up backwards.

As to the dying, sounds fairly common for the ignition module. With all the different changes though, it will take a bit to narrow down again. Also is possible that you are getting a case where the carb boils the fuel, and then floods. After sitting, it clears and all is happy until it starts to boil out again. It can be tricky catching it in the act on such.
__________________
My trucks:
The workhorse, 86 F250 4x4 6.9 nat aspirated, 3.25 exhaust, custom intake, electric fuel pump, otherwise well used stock... not real pretty but just loves to work!

The other heavy hauler, 92 F350 2wd dually crew cab, flatbed/toolboxes, 92 Cummins VE 12V with intercooler, NV4500 manual

The beater: 88 F250 4x4, 5.8 5 speed
The project ... 1978 F150 4wd shortbed 351 auto

ASE certified parts specialist
I do most all of my own work so I know who to complain to..Roger
Reply With Quote
  #5  
Old 09-12-2016, 12:32 AM
Lorddurock's Avatar
Lorddurock Lorddurock is offline
 
Join Date: Feb 2015
Location: Northern Colorado
Posts: 221
Lorddurock is a splendid one to beholdLorddurock is a splendid one to beholdLorddurock is a splendid one to beholdLorddurock is a splendid one to beholdLorddurock is a splendid one to beholdLorddurock is a splendid one to behold
Quote:
Originally Posted by Fellro View Post
Are you certain that the cable was intended for positive? You can get replacement cables that are red and put on as a negative, so don't always trust that the color is indicative of polarity. I have had a few vehicles that if you did that, you would hook it up backwards.

As to the dying, sounds fairly common for the ignition module. With all the different changes though, it will take a bit to narrow down again. Also is possible that you are getting a case where the carb boils the fuel, and then floods. After sitting, it clears and all is happy until it starts to boil out again. It can be tricky catching it in the act on such.
maybe a plastic carb spacer is in order? cheap test/fix
__________________
"Everyone thinks of changing the world, but no one thinks of changing himself." tolstoy

"May you live your life as if the maxim of your actions were to become universal law" Immanual Kant

00 Vw jetta 2.0
77 f150 429
83 Buick century 4.3 diesel (lost to young fun)
-and many others
Reply With Quote
  #6  
Old 09-12-2016, 07:17 AM
68F1006.4's Avatar
68F1006.4 68F1006.4 is offline
 
Join Date: Aug 2016
Location: The Woodlands, Tx
Posts: 484
68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice
Quote:
Originally Posted by Fellro View Post
Are you certain that the cable was intended for positive? You can get replacement cables that are red and put on as a negative, so don't always trust that the color is indicative of polarity. I have had a few vehicles that if you did that, you would hook it up backwards.

As to the dying, sounds fairly common for the ignition module. With all the different changes though, it will take a bit to narrow down again. Also is possible that you are getting a case where the carb boils the fuel, and then floods. After sitting, it clears and all is happy until it starts to boil out again. It can be tricky catching it in the act on such.
It was definitely on the positive side, the negative goes to a bolt on the block.
Quote:
Originally Posted by Lorddurock View Post
maybe a plastic carb spacer is in order? cheap test/fix
It already has a 1" aluminum carb spacer.
__________________
Bow low before God, stand tall before man, and stand firm in the gap.
Reply With Quote
  #7  
Old 09-12-2016, 07:20 AM
68F1006.4's Avatar
68F1006.4 68F1006.4 is offline
 
Join Date: Aug 2016
Location: The Woodlands, Tx
Posts: 484
68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice
One thing to note is that when I first got it, the clear filter just before the carb would stay full of gas at all times, even when it was shut down. Now it will only fill up about halfway then drain out completely when the truck dies.
__________________
Bow low before God, stand tall before man, and stand firm in the gap.
Reply With Quote
  #8  
Old 09-12-2016, 09:14 PM
cbaker65's Avatar
cbaker65 cbaker65 is offline
 
Join Date: Apr 2014
Location: Mcfarland,Calif.
Posts: 4,852
cbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond reputecbaker65 has a reputation beyond repute
You still running the behind the seat fuel tank?

I would check the lines an make sure theres nothing getting sucked
into them.
You can try a gas can by itself under the hood from the fuel pump!..
__________________
CB

Im not a bum,Im on vacation!....
Reply With Quote
  #9  
Old 09-12-2016, 09:29 PM
Fellro's Avatar
Fellro Fellro is offline
Ford Truck Fanatic Administrator

Moderator
Admin
 
Join Date: Jan 2007
Location: Iowa County, Iowa
Posts: 7,427
Fellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond reputeFellro has a reputation beyond repute
Concerning the cable, did it perhaps go to a terminal that was on a round plastic part on the fender? If so, that is the starter solenoid/relay. Could have simply been a bad connection. All of your power distribution is from that terminal.
__________________
My trucks:
The workhorse, 86 F250 4x4 6.9 nat aspirated, 3.25 exhaust, custom intake, electric fuel pump, otherwise well used stock... not real pretty but just loves to work!

The other heavy hauler, 92 F350 2wd dually crew cab, flatbed/toolboxes, 92 Cummins VE 12V with intercooler, NV4500 manual

The beater: 88 F250 4x4, 5.8 5 speed
The project ... 1978 F150 4wd shortbed 351 auto

ASE certified parts specialist
I do most all of my own work so I know who to complain to..Roger
Reply With Quote
  #10  
Old 09-12-2016, 10:11 PM
68F1006.4's Avatar
68F1006.4 68F1006.4 is offline
 
Join Date: Aug 2016
Location: The Woodlands, Tx
Posts: 484
68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice68F1006.4 is just really nice
Quote:
Originally Posted by cbaker65 View Post
You still running the behind the seat fuel tank?

I would check the lines an make sure theres nothing getting sucked
into them.
You can try a gas can by itself under the hood from the fuel pump!..
Yes, still using the tank behind the seat. The lines are flowing freely as far as I can tell, but the gas can is a good idea to verify for sure.
Quote:
Originally Posted by Fellro View Post
Concerning the cable, did it perhaps go to a terminal that was on a round plastic part on the fender? If so, that is the starter solenoid/relay. Could have simply been a bad connection. All of your power distribution is from that terminal.
No, that cable is still there and those connections are some that had to be improved. The cable I was referring to was a second cable running off of the terminal. Removing it didn't seem to help or hurt though.
__________________
Bow low before God, stand tall before man, and stand firm in the gap.

Last edited by 68F1006.4; 09-12-2016 at 10:14 PM.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 08:43 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Ford Truck Fanatics is not affiliated with or endorsed by Ford Motor Company.