What year is the TBI and computer from..i'll see if I can come up with some wiring diagrams. 
Wiring diagram and TBI questions
I will be starting to install my TBI setup very shortly, however I need a wiring diagram before I begin. I will be using only the wiring that is directly connected to the computer, to help simplify it. I have a few questions concerning this swap as well.
1. Will it cause problems using an external voltage regulator, and just giving the computer voltage by adding a wire to the already existing terminal on the alternator?
2. What aftermarket fuel guage can I use with the TBI fuel level sending unit? Autometer's guages are from 0 (empty) to 90 (full) ohms, what is the TBI's range?
3. Can I keep most of the vacuum lines the way they are, and just switch them to the new manifold (90 360 TBI manifold and TB)?
4. Can I use the existing EGR valve with the new manifold?
5. Can I use the light for the "emissions" system as the "check engine" light by disconnecting the battery pack and splicing the wires from the computer?
That is about it for now, it's all I can remember. Thanks in advance guys and gals!
1. Will it cause problems using an external voltage regulator, and just giving the computer voltage by adding a wire to the already existing terminal on the alternator?
2. What aftermarket fuel guage can I use with the TBI fuel level sending unit? Autometer's guages are from 0 (empty) to 90 (full) ohms, what is the TBI's range?
3. Can I keep most of the vacuum lines the way they are, and just switch them to the new manifold (90 360 TBI manifold and TB)?
4. Can I use the existing EGR valve with the new manifold?
5. Can I use the light for the "emissions" system as the "check engine" light by disconnecting the battery pack and splicing the wires from the computer?
That is about it for now, it's all I can remember. Thanks in advance guys and gals!
1 - 9 of 9 Posts
Everything came off of a 90 TBI. Thanks Chump, you rock!
haynes dodge pkup service manual has complete wiring diagrams for mod from mid 70's -- 90's. avail at most auto parts stores. if this setup is coming from a doner truck, i would suggest also getting the complete wiring harness also. also the distributor. computer needs several inputs from different sources to controll fuel delivery. fuel pressure needs to be 14.5 -- 15 lb, sig from dist,tbi temp,coolant temp,map sensor,o2 sensor. this may not be a complete listing of needed computer inputs, but get the service manual. you'll get a good idea of what you need. i just completed a tbi install on an 88 pu, using a 440 eng. fortunally i already had the needed wiring. if i can help you with questions, let me know.dodge8564 said:Everything came off of a 90 TBI. Thanks Chump, you rock!
I do have the donor's wiring harness, I am just going through and weeding out all of the non-computer wiring and trying to figure out where some cut wires go to. I got a wiring breakdown from chump, and with my haynes manual I should be able to figure it out. Thanks Chump and Thanks Sheriffsheriff said:haynes dodge pkup service manual has complete wiring diagrams for mod from mid 70's -- 90's. avail at most auto parts stores. if this setup is coming from a doner truck, i would suggest also getting the complete wiring harness also. also the distributor. computer needs several inputs from different sources to controll fuel delivery. fuel pressure needs to be 14.5 -- 15 lb, sig from dist,tbi temp,coolant temp,map sensor,o2 sensor. this may not be a complete listing of needed computer inputs, but get the service manual. you'll get a good idea of what you need. i just completed a tbi install on an 88 pu, using a 440 eng. fortunally i already had the needed wiring. if i can help you with questions, let me know.dodge8564 said:Everything came off of a 90 TBI. Thanks Chump, you rock!
Okay, I guess I need some more information on this. I need a wire list or diagram for a 90 Dodge PU, the big plug that goes into the cab. My chiltons doesn't cover TBI equipped vehicles, and my Haynes is missing some info. Thanks again!
I sent you an email with some info from a 90 RC...should be the same?
Once again Chump, you are the man! Yes, it will definately work for meChump said:I sent you an email with some info from a 90 RC...should be the same?
. Damn, what would RCC do without you man? 
Chrysler sending units are 240Ù empty /33Ù full... GM uses the 0/90Ù units. Any Chrysler or Ferd gauge will work, and most "universal" (and all Autometer universal) gauges use Chrysler senders..
The TBI units use both the EMR and check engine lights, although the EMR is pretty useless.. Sure, you can just splice the Check engine output to the instrument cluster. You can also try to find a message center in the JY, unless you have the clock there and like it.
Matt {peace}
(PS.. Damn fonts! )
The TBI units use both the EMR and check engine lights, although the EMR is pretty useless.. Sure, you can just splice the Check engine output to the instrument cluster. You can also try to find a message center in the JY, unless you have the clock there and like it.
Matt {peace}
(PS.. Damn fonts!
)1 - 9 of 9 Posts
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