Fi Tech fuel injection problems
New User
Joined: Mar 2016
Posts: 19
Likes: 0
From: New Hampshire
I had a problem with getting the idle correct. I forgot about it until reading this. I cant remember the exact process that they walked me through over the phone, but it had to do with adjusting the butterflies, primary and secondary. I would call them up when you are standing in front of it and can physically work on it. You will need a phillips screwdriver.
Cargo Master
Joined: May 2009
Posts: 2,587
Likes: 47
From: Eagle River, AK
Most respectfully...WHY?!?!?
The beauty of these trucks is ease of maintenance and dependability: No sensors, solenoids, computers and miles of complicated wiring to break on you.....
There is a reason these 73-79 trucks are still on the road with a gazillion miles on them nearly 50 years later: They were BUILT RIGHT THE FIRST TIME.
Not to be a dick, but if carburetor tech is too difficult for you and maintaining a truck with very basic hand tools isn't your thing, maybe consider an 1986 and up F series with EFI.
The beauty of these trucks is ease of maintenance and dependability: No sensors, solenoids, computers and miles of complicated wiring to break on you.....
There is a reason these 73-79 trucks are still on the road with a gazillion miles on them nearly 50 years later: They were BUILT RIGHT THE FIRST TIME.
Not to be a dick, but if carburetor tech is too difficult for you and maintaining a truck with very basic hand tools isn't your thing, maybe consider an 1986 and up F series with EFI.
I won't go into my reasons, because truthfully it doesn't matter what anyone else thinks on that matter.
Happy wrenching.
Thread Starter
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Cross-Country
Joined: Jul 2013
Posts: 86
Likes: 12
From: SW Montana
its cold here, then warm the next week
Most respectfully...WHY?!?!?
The beauty of these trucks is ease of maintenance and dependability: No sensors, solenoids, computers and miles of complicated wiring to break on you.....
There is a reason these 73-79 trucks are still on the road with a gazillion miles on them nearly 50 years later: They were BUILT RIGHT THE FIRST TIME.
Not to be a dick, but if carburetor tech is too difficult for you and maintaining a truck with very basic hand tools isn't your thing, maybe consider an 1986 and up F series with EFI.
The beauty of these trucks is ease of maintenance and dependability: No sensors, solenoids, computers and miles of complicated wiring to break on you.....
There is a reason these 73-79 trucks are still on the road with a gazillion miles on them nearly 50 years later: They were BUILT RIGHT THE FIRST TIME.
Not to be a dick, but if carburetor tech is too difficult for you and maintaining a truck with very basic hand tools isn't your thing, maybe consider an 1986 and up F series with EFI.
Elder User
Joined: Apr 2016
Posts: 854
Likes: 7
Eh, we get -20 on occasion and as high as 115 here in PA. I tune for it. I like EFI on extreme trail rigs, but that's about it. Have spent too many hours replacing sensor this and circuit that and chasing BS with a scan tool and a multimeter throughout my lifetime on EFI vehicles to be impressed by it.
Good luck and thanks for not being offended
Good luck and thanks for not being offended
Thread Starter
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Cross-Country
Joined: Jul 2013
Posts: 86
Likes: 12
From: SW Montana
Alright, yea and theres a very real chance I end up saying the hell with it and throwing a carb back on there if it does turn into a Engine Control Mismanagement box haha, but I do want to play with it, part of it is that my truck is in really great mechanical shape, but the paint was a cheep macco paint job 5 years ago and looks a little rough. where I work right now, I'm surrounded by a bunch of spoiled rodeo kids my age, (19-25 years old) and all of them have had their mommy & daddy buy them a 2017 dodge or ford or whatever so they make fun of my rig, just a bunch of spoiled brats. so it would just be cool just too mess with them and get it to where it cold starts on cold days like a new vehicle haha.
Senior User
Joined: Apr 2016
Posts: 198
Likes: 0
I installed my fitech this past weekend, stock 351m , weiand intake, command center non timing control. First impressions after correctly setting the iac steps on a warm idle (3-10) , it seems to work fairly well. only about 100km so far . I will update as it goes. Another member 79rangerxlt has done one on his and was having issues, but have not seen any updates.
Cargo Master
Joined: Nov 2011
Posts: 3,354
Likes: 48
From: Great American SouthWest
Here in Yuma county, the coldest it ever gets is about 28 degrees, and that's about sunrise, and only for a couple days every year. But it does get warm-about 120 in the summer. The elevation is about 200'
I've never had any trouble with cold starts or altitude, but then again, I've never had them in real cold nor over about 5000'
My first 79, 30+ years ago, wouldn't run over 5000'. It was probably jetted too rich, but I was young and dumb, and never did figure it out
With the trucks giving me about 8 mpg, I'd like to see an improvement, but...my EFI Taurus had an intermittent problem that left me sitting on the side of the road entirely too many times. Never could figure it out. So I'm staying with carbs!
I've never had any trouble with cold starts or altitude, but then again, I've never had them in real cold nor over about 5000'
My first 79, 30+ years ago, wouldn't run over 5000'. It was probably jetted too rich, but I was young and dumb, and never did figure it out
With the trucks giving me about 8 mpg, I'd like to see an improvement, but...my EFI Taurus had an intermittent problem that left me sitting on the side of the road entirely too many times. Never could figure it out. So I'm staying with carbs!
Laughing Gas
Joined: Jul 2012
Posts: 998
Likes: 3
From: North Pole
My Fitech is almost completely installed. I have a few wires to hook up and the return line to plumb into the filler neck. Pretty easy so far. just hope I don't have to install a pusher pump just to get fuel out of the tank. I will let you know how it goes sometime this week. Every time I go to work on the truck something comes up. getting annoying but that's the way crap goes.
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Laughing Gas
Joined: Jul 2012
Posts: 998
Likes: 3
From: North Pole
So I got the fitech installed tonight and the truck won't start. She cranks and spits and sputter but nothing. I did the initial set up and no go. I have fuel, spark, and checked the timing Atleast 50 times but won't fire. Don't know if there is more tuning to the fitech or not. Anyone have this problem or just me? Thanks
Senior User
Joined: Oct 2016
Posts: 401
Likes: 3
From: Rockville, IN Temporarily
We've installed several here at our shop, They do require some initial tuning and its a new learning curve compared to anything with a carburetor. Go over each single step one by one. Its easy to miss something. Sounds like you still have a timing issue. Go back over each connection as well. Their have been some instances with bad connectors supplied from fitech.
Cargo Master
Joined: May 2009
Posts: 2,587
Likes: 47
From: Eagle River, AK
I know that I had to open up the IAC setting all the way and add extra fuel to get my 360 to fire up. With the IAC opened up, it makes a weird whistling noise for a few minutes, but it's just the air moving through the IAC.
Also, make sure your battery is charged well, the FiTech unit is sensitive to voltage drop.
Also, make sure your battery is charged well, the FiTech unit is sensitive to voltage drop.
Cargo Master
Joined: Nov 2011
Posts: 3,354
Likes: 48
From: Great American SouthWest
Congratulations on getting it going. Looking forward to hearing how it performs for you.
