Need help

[Chris86]

I found a motor for my jeep Comanche 86 tbi 2.5 but the motor i found is in a 95 jeep wrangler 2.5  fuel rail injector and when I try and research it and it says it possible ive got to change the ecu is this correct everything else looks about right and change the harness under the hood

[eaglescout526]

So are you wanting to convert from Renix to HO?

[Chris86]

Yes they said all I would have to do was change the outside harness fuel pump and motor brackets and sensors 

[eaglescout526]

I don’t hear about many converting from TBI to HO so this will be neat. I recommend looking at 4.0 Renix to HO swaps since it should be the same just minus 2 cylinders. 

[Chris86]

But if I go to the 4.0 what all would I have to swap over i know the motor and tranny and transfer case as well i believe and possibly the rear end whats your thoughts see if have found all kinds of 4.0 I can't find the right 2.5 

[eaglescout526]

You’ll need everything from the donor Jeep to swap the drive train. Trans will not bolt up from 2.5 to 4.0. 
However if your just trying to do a block swap, any 2.5L should bolt in. 
 

But going HO is less steps than dropping in a 4.0. 
 

Oh and yours being an 86 there’s a 50/50 chance the firewall will be ready  for the 4.0. And you’ll also have to swap the front end to get the 4.0 radiator in there. Yeah you’re better off keeping the 2.5. 

[Chris86]

Yeah I believe i will keep the oh 2.5 and just swap out the harness thats alot easier lol and also another quick question the metal vacuum lines that run into the throttle body can those be taken out and replaced with standard size vacuum hoses i mean the proper sizes or do they have to be metal 

[eaglescout526]

You can replace those with any size vac line you want. Doesn’t have to be metal but might last longer if they are. 

[Chris86]

Ok thank you and where can I find the right fuel pump for my truck everyone says no more than 15 psi but when you order the pump it shows 90 psi and on some they just offer a inline pump 4 to 6 psi got me all confused 

[eaglescout526]

I think 90 PSI is just the highest it can produce and could be a pump used in other vehicles. The pressure regulator will take care of the pressure made by the pump. 4-6 psi is low for the TBI. Like you’ll struggle to go anywhere low. Course I didn’t think finding a pump these days was such a challenge. 

[ThatJeepGuy]

5 hours ago, Chris86 said:

Ok thank you and where can I find the right fuel pump for my truck everyone says no more than 15 psi but when you order the pump it shows 90 psi and on some they just offer a inline pump 4 to 6 psi got me all confused 

 

Buy the coresponding year/model fuel pump for the motor you are putting in and swap it onto your sending unit