no factory tac
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From: Friday Harbor
no factory tac
86 ford F250 w/6.9L has no factory tac. I know there are a lot of after market tac's out there but do they all work with the 6.9's. Being that there obviously is no distributer, how do you hook an after market tac up to the 6.9 IDI's.
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Some read off the alternator somehow, others get a trigger and a probe attached to the crank. The factory setup uses Hall effect and reads off the teeth of the gear that drives the injection pump. You can install a factory setup in your truck, it's not hard and yu may already have some of the parts needed - can you take a picture of your IP gear cover and post it here?
Methanoholic
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From: Maine (NorCal Native)
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Sorry about that, yeah it's right where John and Festus said it is. By the way there are at least two different gear housings, one is the kind that Festus linked you to that picture of, and the other has neither a tach sensor port nor a cast oil fill neck and the oil is poured in through a bent steel tube attached to the front of the gear housing. I think there is also a third housing that has the tach sensor port but no oil fill neck, but I'm not 100% sure on this... So what do you have in your truck, compared to that picture?
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From: Friday Harbor
Thank you for the info guys. I am having trouble getting my pic uploaded from my phone to my email however under my hood by the oil pump and the IP doesnt look like the one festus sent. as soon as I get the pic uploaded I will post it here.
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From: Friday Harbor
Festus, again thanx for the pic. The circled items in your pic are not on my engine do you have any suggestions on a tach for my truck. I have read where these diesels have a rev limiter which is great however I want a tach to monitor my engine more than anything else, much as I did when I was driving a rig. If you have any suggestions I would greatly appreciate it.
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You can swap out the gear cover for one that has the tach sensor port, junkyard is your friend for that. It's a bear of a job cause the IP has to come off and you can skip timing if you ain't careful, but it's definitely doable. Then Doug who posted above knows how to wire up the tach to the sensor, as he did it with his C30 (he has a Chevy truck with a Ford diesel and an E4OD, now how cool is that?)
Methanoholic
Joined: Mar 2009
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From: Maine (NorCal Native)
Don't pull the IP gear cover without first asking on here, if done wrong it can turn into a nightmare.
I think you have to have a few more posts before you can upload images, however here are the steps.
Pictures & Albums - Howto
You may have more trouble finding a Factory Tach then the IP cover with Tach port.
It took me over a year to find one.
After market hall effect tachs are not cheap, they have lower cost after market ones that work off the alternator or something like that, sounds like a POS to me though I have never seen one so I can't honestly say that.
-Enjoy
fh : )_~
I think you have to have a few more posts before you can upload images, however here are the steps.
Pictures & Albums - Howto
You may have more trouble finding a Factory Tach then the IP cover with Tach port.
It took me over a year to find one.
After market hall effect tachs are not cheap, they have lower cost after market ones that work off the alternator or something like that, sounds like a POS to me though I have never seen one so I can't honestly say that.
-Enjoy
fh : )_~
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
What part of the world are you in, if you're in the lower half of the USA start hitting the Junk Yards, In the upper half, stuff gets hauled to Canada for scrap and it's hard to find old iron.
Here in Maine there is very little older then '96, I get my stuff from the west coast / south west.
-Enjoy
fh : )_~
Here in Maine there is very little older then '96, I get my stuff from the west coast / south west.
-Enjoy
fh : )_~