78 Bronco-cuts out @ 50 - Texas 4x4 Forum

Go Back   Texas 4x4 Forum > Technical > Gas\Diesel Engine & Transmission

Photo Gallery Places to Wheel Gallery III Home Forum Tech Section IRCChat FlashChat

Gas\Diesel Engine & Transmission Engine, Transmission, Transfer case

Texas4x4.org is the premier All All Forum on the internet. Registered Users do not see the above ads.

Gas\Diesel Engine & Transmission:

78 Bronco-cuts out @ 50



Like Tree1Likes
  • 1 Post By saltbranch

Reply
 
Share LinkBack Thread Tools Display Modes
Old 04-28-2013, 04:32 PM   #1
Poser
 
Join Date: Jan 2009
Location: SouthTexas
Posts: 49
saltbranch just gettin started
78 Bronco-cuts out @ 50

78', 351 modified, auto.
Acts like it runs out of fuel at about 50 and starts surging
I changed fuel filters, did have a small amount of rust.
I have a filter between tank/pump and filter between pump/edelbrock carb
pulled tank cleaned it, reinstalled, flushed fuel lines, replaced stock pump, replaced filters
truck still doing exact same. I have pulled 2-20oz coke bottles of fuel through it and both were clean, nothing visible.
edelbrock 4 barrel, vac 2ndary
Suggestions on what to check?
saltbranch is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-28-2013, 08:55 PM   #2
Wheels 4 Food
 
Join Date: Nov 2006
Location: Cibolo
Posts: 4,075
obijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud of
How does it run without filters?
__________________
When I grow up I want to be like fourwheelerjeff
obijuan is offline   Reply With Quote
Old 04-28-2013, 09:05 PM   #3
Gonzo Wheeler
 
Join Date: Jul 2006
Location: Vidor,TX
Posts: 2,892
Rebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud of
Are you sure it's a fuel issue? Is it only when it's warm or at all times?
__________________
94' Toyota
LQ4/Atlas/Tons
Rebelrider is offline   Reply With Quote
 
Old 04-28-2013, 09:34 PM   #4
Wheels 4 Food
 
Join Date: Nov 2006
Location: Cibolo
Posts: 4,075
obijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud ofobijuan has much to be proud of
Vacuum advance?
__________________
When I grow up I want to be like fourwheelerjeff
obijuan is offline   Reply With Quote
Old 04-28-2013, 09:34 PM   #5
Poser
 
Join Date: Jan 2009
Location: SouthTexas
Posts: 49
saltbranch just gettin started
Does the same without the filters including air filter. I pulled the vac. line to Dist. to see if it made any difference...nope.
saltbranch is offline   Reply With Quote
Old 04-28-2013, 09:35 PM   #6
Poser
 
Join Date: Jan 2009
Location: SouthTexas
Posts: 49
saltbranch just gettin started
Quote:
Originally Posted by Rebelrider View Post
Are you sure it's a fuel issue? Is it only when it's warm or at all times?
Seems worse when cool and gets better somewhat warmed up. Cool it starts falling on face about 40mph, warmed up 50-55 mph
saltbranch is offline   Reply With Quote
Old 04-28-2013, 09:38 PM   #7
Gonzo Wheeler
 
Join Date: Jul 2006
Location: Vidor,TX
Posts: 2,892
Rebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud of
I'm assuming that year uses an icm? They can cause the same symptoms.....
__________________
94' Toyota
LQ4/Atlas/Tons
Rebelrider is offline   Reply With Quote
Old 04-28-2013, 09:57 PM   #8
Poser
 
Join Date: Jan 2009
Location: SouthTexas
Posts: 49
saltbranch just gettin started
Quote:
Originally Posted by Rebelrider View Post
I'm assuming that year uses an icm? They can cause the same symptoms.....
I replaced this about a year or so ago. I pulled it off the inner fender earlier and it visually appears to be good. No fluid leaking etc like the last time? Think its better to replace? Got new plugs,wire cap,rotor going in tomorrow. Guess i might as well replace it too.
saltbranch is offline   Reply With Quote
Old 04-28-2013, 10:10 PM   #9
Wheels 4 Food
 
Join Date: Apr 2006
Location: ft worth
Posts: 3,303
dustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubis
Does it have headers? I had a 79 bronco and the fuel line ran by the headers, get them to hot and you get fuel lock.
__________________
Who knows?
dustin_mud is offline   Reply With Quote
Old 04-28-2013, 11:01 PM   #10
Poser
 
Join Date: Jan 2009
Location: SouthTexas
Posts: 49
saltbranch just gettin started
Quote:
Originally Posted by Rebelrider View Post
I'm assuming that year uses an icm? They can cause the same symptoms.....
Ok, after some thinking, I believe it was ext. regulator I replaced a year or so ago. I went and looked at the truck(already had it @ Mech. shop) and I do have goo leaking from ICM. Drove it home and we will replace during the week as time permits.
It does have headers but the fuel lines are not routed near them any where that i can see.

Thanks for the tips and ideas. I will update our progress.
saltbranch is offline   Reply With Quote
Old 04-28-2013, 11:07 PM   #11
Wheels 4 Food
 
Join Date: Apr 2006
Location: ft worth
Posts: 3,303
dustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubisdustin_mud Surfs Venus with Anubis
Mine had factory hard lines that ran on inside of the frame next to the headers, just a thought.
__________________
Who knows?
dustin_mud is offline   Reply With Quote
Old 04-29-2013, 06:35 AM   #12
Gonzo Wheeler
 
Join Date: Jul 2006
Location: Vidor,TX
Posts: 2,892
Rebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud of
Quote:
Originally Posted by saltbranch View Post
Ok, after some thinking, I believe it was ext. regulator I replaced a year or so ago. I went and looked at the truck(already had it @ Mech. shop) and I do have goo leaking from ICM. Drove it home and we will replace during the week as time permits.
It does have headers but the fuel lines are not routed near them any where that i can see.

Thanks for the tips and ideas. I will update our progress.
That's where I'd start. If I remember right, their not too pricey. That's why I asked if it got worse as it got warm. USUALLY, it gets hot and starts breaking down. Just FYI, if one ever starts acting up and you don't have access to another.....stop and buy a bag of ice and zip tie it to it. That should get you home or to a parts house......
__________________
94' Toyota
LQ4/Atlas/Tons
Rebelrider is offline   Reply With Quote
Old 04-29-2013, 08:14 AM   #13
Wheelin MadMan
 
ontherun's Avatar
 
Join Date: Jul 2004
Location: San Antonio TX
Posts: 921
ontherun is just really happyontherun is just really happyontherun is just really happyontherun is just really happy
If that doesn't work re-check the flaot level in your carb, inproper fuel level will make it cut out, also a bad fuel pump, looks like it works but runs slow.. I put a electric pump on mine no more trouble...L
__________________
L & S
BG² build In progress,.by the new owner
:::::::::::::::::::::::::::::::::::::::::::::::::: :::::::::::::::::::::::::::::::::::::::::::::::
"I have sworn eternal hostility to every form of tyranny over the mind of man." (Jefferson)

Quote:
Originally Posted by Monstercrawler View Post
Lookin good man. I can't freakin wait to beat on that little thing.
ontherun is offline   Reply With Quote
Old 04-30-2013, 07:04 PM   #14
Poser
 
Join Date: Jan 2009
Location: SouthTexas
Posts: 49
saltbranch just gettin started
Quote:
Originally Posted by Rebelrider View Post
I'm assuming that year uses an icm? They can cause the same symptoms.....
Thank you everyone for the help. Turns out it was the ICM, old girl runnin good now!
Rebelrider likes this.
saltbranch is offline   Reply With Quote
Old 04-30-2013, 09:12 PM   #15
Gonzo Wheeler
 
Join Date: Jul 2006
Location: Vidor,TX
Posts: 2,892
Rebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud ofRebelrider has much to be proud of
Cool deal.
__________________
94' Toyota
LQ4/Atlas/Tons
Rebelrider is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Bookmarks

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
78 bronco suspension? saltbranch Axles, Brakes, Steering, Suspension, Tires & Wheels 1 09-28-2012 09:28 PM
78 Fullsize Bronco XLT rrbbgross For Sale 0 08-08-2010 12:59 PM
78 Bronco half doors stx4wheeler Interior & Exterior body Mods 2 06-28-2010 09:22 PM
78 Bronco Custom trail rig Justshootme84 Projects Forum 1 06-27-2007 07:10 AM
FS 78 Bronco cheder For Sale 6 07-10-2006 12:53 PM


All times are GMT -6. The time now is 10:58 PM.


3.8.8 - Powered by vBulletin
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright 2002-2012 Texas4x4.org
 

SEO by vBSEO 3.6.0