I have an 88' vert that I'm going to swap a s5 13bt into. If I'm willing to find an s5 engine wiring harness, turbo or vert ecu can I just splice my s4 vert dash harness so it will plug into the s5 ecu? All I find is threads on swapping some s4 13bt parts on the s5 13bt block.I think so you can use s4 ecu to make the dash harness work easier. Is it really that much a pain in the *** to rewire the stock s4 na dash harness to work properly with the s5 ecu?

 

yes you can do it, and yes its a pain in the butt. i think the easy way would be to get the engine harness side plugs from an s4 and the car side from an s5 and make an adaptor harness, no cutting and soldering updie down is a good thing, methinks

 

^

 

is the ability to search not working? Because this has been covered to death.

So lets do it again (as Mark and the other moderators and members sigh a disgusted sigh, in the utter frustration of the inabilities of some members to search or even look at last week threads and that this has to be covered again)

It is never recommended to cross platforms like you are suggesting. However if for some strange reason you have it in your head to do that utter waste of time, then you want to use the engine harness to match the interior harness.

88 Verts using dedicated interior harnesses leave you with only 4 options. They are listed below (sadly again).

1: to use the 88 vert engine harness and ECU on the S5 motor. (this also requires replacing the S5 MOP and front covers with S4 ones, and injector plugs, but that is pretty easy).

2: to find a 89 vert entire interior harness and dash switches, CPUs etc, to match up to a S5 engine harness and rewire the entire car.

3: Bastardize the car by trying to match plugs and wires for a S4 interior and a S5 engine harness. This is probably the most time consuming of them all and besides being an utter waste of time, pretty much requires an above average ability with plugs, harnesses, and electrical systems. This approach (as covered on rotary resurrections website as well as here) is a utter nightmare, and will add (on average) about 48 man hours onto the swap and requires access to the wiring diagrams of both S4 verts and S5 Turbos as well as tosses serviceability out the window.

4: Use an aftermarket ECU

So with all that said, give me an answer of why this thread covering the same thing as other threads countless times should be left open.

And I edited your title so that it has a subject instead of the vague title that was there.

 

yeah, um it's called sarcasm apparently non of you have ever heard of it. But can I rewire the s4 dash harness to a S5 dash harness plug. I could care less if any of my gauges work seeing as how I'm makeing a new gauge cluster setup, I just want to get my lights, and turn signals to work, I don't drive my car in the rain ,don't have a/c or heat, don't like having a cd/player. So how much do I gotta hook up if I only want a couple "basic things" to work. It's gonna be a weekend driver most likely, or just a drift car.

 

the best thing to do is what icemark said, or do what i did..... swap the entire cars wiring harness..... i went from s5 na to s4 turbo (every wire had to be swapped)...... to answer your question... yes, you can cut and splice the harnesses...... but with how shitty the wiring is on fc's anyways, i wouldnt recommend it... your asking for an electrical fire! if you want the low down on how to splice the wiring, ask (dont hate me for saying his name).. wayne88na, he has helped me with all of my electrical problems... although i dont think he will like what you want to do either... but good luck with whatever you choose.. ihope it works out

 

If I buy the whole S5 harness, I can get it, will it plug into my s4 dash or do I have to switch the dash parts too?

 

No, not the dash harness... that is only a small part of the issue.

It is the front harness that you would be modifying it if you were hacking up the harnesses... that is all the lights, fuses, power, switches, etc would need to be modified. It is no where near moving a couple of pins and plugging in.

what makes you want to do this the absolute hardest way??? Glutton for punishment???

 

Why not just buy the S4 turbo engine harness? do you like making things difficult? since your willing to go with out all those things like heat and a stereo why not just premix the car, that way I dont think you even need to swap the front housing. You can pick up a S4 engine harness for like $100..............................................

 

I specified with jspec auto sports that I wanted an S4 13bt and they said they'd send me an s4. Trust me, I already had all my s4 swap parts and those bastards messed me all up I didn't want it to get this involved for 20 extra hp. I don't have all the s413bt parts to make it easy. Maybe I'll just sell my vert and put the engine in an s5. I need a carb kit.

 

I took a look at that site. http://www.jspecautosports.com/Warranty.aspx

I'm curious. Did you buy the engine/transmission/ECU package? And it turns out to be a series five engine/transmission/ECU? Right? Or did you get another package? Thank you.

 

I got the engine/tranny/intercooler package for 1075$. s4 and s5 engines from there cost the same amount. The engine is nice as hell, just the wrong series. Gonna end up costing me an arm and a ******** to get this bastard to work right.

 

Hmmmmmmm. The OMP seems to me to be the drawback. I'm on shakey ground with this, but can't you remove the front cover on your series four....and bolt it on the series five? Frankly I don't know for SURE if they will fit. But doing that would remove the OMP obstacle if you used a series four ECU (The same one you now have).

The next obstacle I see is the boost conroller/solenoid that's on a series five. That could be overcome with a aftermarket boost controller. About eighty bucks for a manual one. Or as an alternate method, I THINK the vac line from the turbo to the solenoid could be plugged. Then you could only run about 5-7. The boost would be governed by the waste gate spring. At least you could drive it and have boost til you got a aftermarket boost controller.

The driveshaft....I figure you know you need a aftermarket one for the transmission to match the rearend.

Other than those things, I don't see why the stock non turbo harness cannot be used with the series five engine. There are about three to four wires that need a bit of modification. Don't forget about the series five alternators plug being different. Still just two small wires but the size of the connector is different.

From where I stand, the OMP is the biggest drawback. But if you still have a front cover for a series four.....swap 'em out. So the OMP will work (your old OMP, that is. The new series five won't work without a series five ECU).

OOOps. Left out the turbo pressure sensor. The AFM will work fine, but the pressure/boost sensor needs to be replaced if you have just a non turbo pressure/boost sensor.

So? Where and what are the FLAWS in what I just said? P.S. I've done a non turbo to turbo swap in the past and didn't bust my brain figuring things out. Works just fine.

 

doublepost

 

I'm gonna see if I can just swap out the entire car harness for a full s5 TII harness.

 

That won't work since you have a vert.

The only harness that would work with a S5 Turbo engine harness would be a 89 vert harness.

 

Well, I don't care if my top works, I'm going to fiberglass it after I drop the motor in. Would it work if I don't care if my top works? I might be able to get some $$ back if I sell my top motors.

Thanks, Tony

 

Best responce I've seen in a while.

 

For one the motors that come from Japan arnt as clear and cut about what series they are as the ones here. What makes you think your motor is a S5? I got a Jspec about a year ago with dual S5 TPS and a mech. MOP so what series is that?

Im sorry dude but you are a dumb *** you know how easy that would be to put in with a S4 engine harness? for $200 you could get a harness and ECU but it dosent even seem like you are comprehending that but you are going to make a fiber glass top for your vert? ok sure

 

<edited for flaming>What, you dont think japanese are allowed to mod their cars or something. And For one, it has an s5 turbo, for two it doesn't have a mech omp, for three the knock sensor is above the T plug in front housing. You do the math <edited for flaming>, oh and anyone who can't use fiberglass, they really should be taught. Yeah right, I'm sure you know your stuff better than kevin landers, and he doesn't say its easy. Oh, elaborate with your "its so easy to use an s4 harness", give me all the details so I can have an easy time. And I know about switching to s4 13bt parts and thats just not an option. Come on, give me a complete writeup mr. wankel.

 

Gerbraldy you best knock off the flaming and poor attitude or myself or another mod will lock this thread faster than you can say dumbass.

 

He he , just when it was getting fun

 

My answer is in the jpg below:

Apart from that, how did the delivery of the enigne package go from the time of your order to being delivered? And physically how does the engine etc look from the outside?

If you are disatisfied, I might be willing to buy it from you, but not at some markup price.

 

so if i were to put a s5 13b in my 88 vert i would have to get rid of my kewl s4 gage cluster because i dont fancy those round gages

 

Sorry Icemark, but if someone calls me a dumbass I'm gonna flame back, can't do it to you for implying that I'm a dumbass because I'll get banned. So, I can call people dumbass's all I want? Ok............. Sorry I'm not gonna sell my engine hailer, I'll just try and get this swap done so I can get rid of this heavy *** car. Thanks for your help Icemark and Vipers.. much appreciated.

EDIT: It took about 8 days to get it from Quebec to Florida, and the engine looks nice, nothing is broken....