79 4x4 question
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Junior User
Joined: Aug 2005
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From: Cherryville, NC
79 4x4 question
ok, so i rescued this pretty decent 79 4x4, 351m/400 from going to the scrap yard and figured i could make a couple bucks on it.
the problem i am having is that when i try to start the truck it tries to run but spitts and sputters like its out of time. i have verified all the timing, this isnt the 1st ford project ive taken on so i know all the basics. i was hoping i am overlooking something simple. its getting spark, getting fuel, and is in time yet it barely runs and even while its doing that its spitting a little fuel out the carb like a spray. i have eliminated vacuum issues by temporarily doing some plugging off. kinda a little dumbfounded right now cause i know its probably something stupid but i figured id ask. thanks for the help guys!
the problem i am having is that when i try to start the truck it tries to run but spitts and sputters like its out of time. i have verified all the timing, this isnt the 1st ford project ive taken on so i know all the basics. i was hoping i am overlooking something simple. its getting spark, getting fuel, and is in time yet it barely runs and even while its doing that its spitting a little fuel out the carb like a spray. i have eliminated vacuum issues by temporarily doing some plugging off. kinda a little dumbfounded right now cause i know its probably something stupid but i figured id ask. thanks for the help guys!
Posting Guru
Joined: Nov 2008
Posts: 1,937
Likes: 2
From: wyoming
possible carb issue.
ok, so i rescued this pretty decent 79 4x4, 351m/400 from going to the scrap yard and figured i could make a couple bucks on it.
the problem i am having is that when i try to start the truck it tries to run but spitts and sputters like its out of time. i have verified all the timing, this isnt the 1st ford project ive taken on so i know all the basics. i was hoping i am overlooking something simple. its getting spark, getting fuel, and is in time yet it barely runs and even while its doing that its spitting a little fuel out the carb like a spray. i have eliminated vacuum issues by temporarily doing some plugging off. kinda a little dumbfounded right now cause i know its probably something stupid but i figured id ask. thanks for the help guys!
the problem i am having is that when i try to start the truck it tries to run but spitts and sputters like its out of time. i have verified all the timing, this isnt the 1st ford project ive taken on so i know all the basics. i was hoping i am overlooking something simple. its getting spark, getting fuel, and is in time yet it barely runs and even while its doing that its spitting a little fuel out the carb like a spray. i have eliminated vacuum issues by temporarily doing some plugging off. kinda a little dumbfounded right now cause i know its probably something stupid but i figured id ask. thanks for the help guys!
Thread Starter
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Junior User
Joined: Aug 2005
Posts: 56
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From: Cherryville, NC
yeah, thinkin about a quick carb rebuild but just wanted to see if any of you thought that might be making the fuel spit back up while its trying to run? the fuel is good cause when i dropped the tank and put new sending unit in i put fresh fuel in.
Posting Guru
Joined: Nov 2008
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From: wyoming
ignition and compression test!
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Junior User
Joined: Aug 2005
Posts: 56
Likes: 0
From: Cherryville, NC
yeah, more than double checked timing issues cause thats what its acting like, gonna run a compression test tomorrow, what are these engines supposed to be running? theres no real indication of blown head gasket but at this point its worth a shot, when it does fire up it only runs at full throttle and runs low rpm real rough like, fuel spitts out the carb and i dont wanna push it too hard and light it up. would a compression leak force that fuel back up thru the intake??
Posting Guru
Joined: Nov 2008
Posts: 1,937
Likes: 2
From: wyoming
blowing back through carb?
yeah, more than double checked timing issues cause thats what its acting like, gonna run a compression test tomorrow, what are these engines supposed to be running? theres no real indication of blown head gasket but at this point its worth a shot, when it does fire up it only runs at full throttle and runs low rpm real rough like, fuel spitts out the carb and i dont wanna push it too hard and light it up. would a compression leak force that fuel back up thru the intake??
Laughing Gas
Joined: Nov 2003
Posts: 898
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From: southeren Oh
If not then your compressions numbers may tell if it fell back a tooth. usually every time you crank the engine with the starter after that first jump in time they will fall back one more notch till they won't even start.
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