Im going to be installing the fitech easy street unit i have a 92 camaro rs original 305 tbi computer running a 350 tbi from 86-95 my questions. If i remove the ecm what wiring will i be left with? Will i need to rewire alternator or starter?
will i be able to wire the new fuel pump control wire to the relay like the original ecm instead of running a whole new system? Does anyone know what all i could keep relay, wiring wise and what i should remove? Any help is APPRECIATED im losing my mind over here and dont know where to start. Thanks in advance!

 

What's wrong with the factory TBI? It's not going to be limited by the 350 you are installing. Get a chip from Tuned Performance and you'll be good to go for $100 or so.

Sounds like the FiTech is beyond your skill level or what you need for that vehicle (stock 350). You have asked the same question twice, been given answers the first time, and apparently aren't getting it. Just leave it be - don't butcher the factory wiring to install fuel injection - you already have fuel injection. Based on your question and statement of being "lost" and "losing my mind" I conclude that if you go down that path with the FiTech you will have at best a fire hazard and will have butchered the wiring in the vehicle, and at worst it may never run correctly at all. Much larger problem than the fuel pump is the distributor situation, etc..... just don't go there. It will accomplish NOTHING.

There are ways to use the factory harness with a stand-alone management computer also with a harness adapter, etc.

GD

 

Already have the parts. Can you help with any of the questions above? I dont need to be told what to do to my car i just need some help figuring out the wiring. If you can help id really appreciate it

 

Also i have succesfully done this onve on a carberatted vehicle. I just need to know what i can remove. Im not cutting the original harness i want to keep it whole and remove it. I just need help with removing the computer and trying to use the relays other wise i know how to do everything else. In my chevelle when i added this system i ran all the wires and that was 30.000 miles ago on a 327 no issues yet, i just need to know what wiring can be removed. I cant afford to buy a chip everytime i change something on the vehicle and it needed a nee ecm completely. So its useless to put 400 into getting the right injectors chip and new ecm when i can have new everything thatll run 600 horsepower for 700$

 

There's a lot going on in the EFI harnesses and the power/ground integration makes it fairly involved to remove *just* the EFI components that you don't want to use. You will have to unwrap the harness and get out a service manual with a proper diagram. How exactly do you want us to "help" you with that? There's literally dozens of wires that will have to be correctly identified and removed from the harness at either both of their termination points or are junctions that are within the harness and are not accurately located on any diagram - you literally have to unwrap the harness and look for them. I recently went through and identified all the emissions related systems that I'm not longer using with my standalone and it took me an entire day to correctly identify, label, and remove/wrap up for later use, all the wiring I'm no longer using. It is highly unlikely that anyone here has done what you are doing on the exact same year/model with the exact wiring colors, etc recently enough to remember every change they made. I went through my wiring as mentioned above mere weeks ago with my '86 wiring diagram and did what I needed to do (took several evenings - probably at least 4 - why I mention an entire day) and I couldn't even tell you what the wire colors were or what they did - I've forgot it already and it's been a couple weeks.

So again - if you don't have the skills to crawl through the diagram and do it properly and safely with high confidence - DONT DO IT. Please don't hack it and then drive around on the same roads as my family. Thanks.

GD

 

THANK YOU. FIRST ACTUAL ANSWER IVE GOTTEN, i can run through the diagrams fine. I have them all. I just needed to know the ecm could stay plugged in just remove certain things. I know which wires needed to be cut into and attached to fitech systen on the fuel pump relay and fan relay. Other than that no cuts or splices to the harness will be made . Other than that everythings gonna be ran the fenderwell and kept intact. I just wanted to make sure the fitech fuel pump wire will trigger the relay to come on and what sensors wires to fold away. Sorry if i was asking wrong! So basically i should just unplug all sensors, etc and run the harness where it cant be seen, other than that if i choose to have the fitech trigger the fuel pump i can cut the ecm lead to the relay and splice that wire in to trigger the relay will it work?

 

The fuel pump will run off the oil pressure switch even if the factory ECM is disconnected.

You can hook the FiTech to the same wire the factory ECM used to trigger the fuel pump relay. It's going to use the same ground side control system to trigger the FP relay.

GD

 

thank you so much. Than its as simple as removing the ecm and attaching the fitech to the original relays since im going hei dist as well. I seriously seriously appreciate it. Finally done posting!

 

also, will be doing it right! Youre family is safe lol