Got out of the shop finally 
CK5
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First Gen, all hardware no software
- Thread starter SpeedlabDan
- Start date
So I bought this '70 K5 and fell in the rabbit hole ever since. It was tired, a victim of someone's "perfume on a pig" restoration. Original 350/350.Paint is nice.
It looks great!!!
Now we just have to work on your photography skills.....
I think that you have been hanging out with the bent one.....
Now we just have to work on your photography skills.....
I think that you have been hanging out with the bent one.....
Thanks but now I think I need to worry about an fitech issue that has arose yesterday and now today. The iPhone pix will have to do for nowIt looks great!!!
Now we just have to work on your photography skills.....
I think that you have been hanging out with the bent one.....
CrpMag122
1/2 ton status
That thing is beautiful!
Bite me hippieIt looks great!!!
Now we just have to work on your photography skills.....
I think that you have been hanging out with the bent one.....
ekajkrats
1/2 ton status
What's going on with your fitech?
Intermittent cutting out. It doesn't throw a code. But it freezes the handheld with rpm at 59000+. Sometimes just a stumble sometimes it cuts all the way. Guys over on the bronco forum are having the same issue. Have been having hit or miss luck adding extra grounds to the throttle body.
It's on a dedicated 12v toggle, aeromotive 340 stealth intank pump with return. Really makes me nervous as I have a 100+ mile trip to make with it Thursday
ekajkrats
1/2 ton status
Sounds like tach noise issue to me. Did you isolate the blue wire away from the spark plugs? I am assuming you are running HEI and not msd.
yep, sounds like tach noise. I've never seen it but heard of it numerous times.
Already been down the tach noise road when I put the efi on the stock engine b4 I rebuilt it. Turned out to be the tach quite literally. It originally had a big rectangular white resistor in line that I left out. After i put that back in line I hadn't a problem until yesterday. It doesn't seem to be doing it at wot and I've been obsessed over the setup board on fitechefi.com I think there are some different things I need to tune like deceleration etc. I won't have time today but tomorrow I'll post any findings. I'll also try disconnecting the dash/mech tach as I can use the handheld.
Yes @ekajkrats its a Davis unified ignition hei
ekajkrats
1/2 ton status
I've also had a small inline resistor since I put mine in. I had to use it when I fist installed an old Holley Projection system. It was causing my mechanical tach to bounce all over.
Like @skunked I've never run into the issue of the 59k rpm. I've only seen a lot of guys on the Fitech Owner's forum on facebook run into it. One theory for the ford guys is the dizzy being in front could be affecting the ecu on the front of the fitech unit. But obviously, that doesn't apply to us.
Most of the time it ended up being that guys changed out the dizzy or did some sort of shielding and the problem went away. I've got a nothing special Summit brand one. I guess all that said, since your grounds are good, I would try shielding if you keep running into it and disconnecting the mech tach doesn't work.
Good luck!
Like @skunked I've never run into the issue of the 59k rpm. I've only seen a lot of guys on the Fitech Owner's forum on facebook run into it. One theory for the ford guys is the dizzy being in front could be affecting the ecu on the front of the fitech unit. But obviously, that doesn't apply to us.
Most of the time it ended up being that guys changed out the dizzy or did some sort of shielding and the problem went away. I've got a nothing special Summit brand one. I guess all that said, since your grounds are good, I would try shielding if you keep running into it and disconnecting the mech tach doesn't work.
Good luck!
I would definitely eliminate any aftermarket and factory tach's and avoid as much factory wiring as possible for trouble shooting.
So many of these issues are traced back to environment issues in the vehicle whether it be old factory wiring, poor installation and/or fuel delivery. I'm not saying you did a poor job installing it, just a generalization after troubleshooting my own installs and others.
So many of these issues are traced back to environment issues in the vehicle whether it be old factory wiring, poor installation and/or fuel delivery. I'm not saying you did a poor job installing it, just a generalization after troubleshooting my own installs and others.
and what version of fitech are you running?
600hp system and yes I do want to go over all grounds and power feed conections. I have changed out the firewall block with American autowires hei upgrade so I have the full 12v. At this point I have hardly tuned the efi at all other than initially entering the engine specs so fingers crossed I can tune it.
I also want to go over all the sub harness connections to assure I hadn't knocked anything loose when I took the cap off to remove the dizzy and put a new gasket in for one of my oil problems lol
Tach is smooth operation and this problem did start after the dizzy was reinstalled FYI that's where I need to start me thinks
With or without timing control? You know where I'm going with this......
yes, I would start there.
No timing control with hei but I do want to see if I can disable the efi rev limiter as well not that it occurs during wot but just in case it's a glitch in the program
ekajkrats
1/2 ton status
I would also get some good mileage through the system before manually tuning (aside form startup), which you might have already done. Some good stop and go, some stop and go. some cruising. All will help the system tune.
Where you heading with it on a 100+ mile trip? Somewhere fun I hope.
Where you heading with it on a 100+ mile trip? Somewhere fun I hope.
