smokimon001

hi everyone,
i have a 86 GXL N/A, and i cant get the idle problem fixed, i am lookin to buy this 88 turbo II complete car with a bad tranny and rear rotor plate. then move it's turbo components, ECU, hood etc... to my car.
my GXL runs perfectly fine, 80,000 miles, 9 out of 10 on body & interior, just bad idle.
is this gonna be harder than doin a complete swap?

SpeedMetal7

The 86 and 88 have completely different wiring harness for the driver side(theres a harness that runs thru the driver side of the firewall, connecting all the starter/alt/headlights and other sensors for that side)

but, since your picking up the entire shell, you pretty much have everything, its not hard to do, you just have to do it..........
if you do go that route, i would strip out the dash making it easier to work with(no glove box, guages, nothing)
it frees up alot of room for movement, remove the hold harness......
Take the harness out of the 88, and remember where everything went, try not to cut any wires etc etc etc....

I just did this, it wasnt difficult just took about 1.5hrs to tear it out and about another hour putting it back in.....

if i were you, and you want to go turbo, just buy all the stuff you need(manifold turbo intercooler etc etc etc) and bolt it together...AaronCake did it, i did it..And it works great, granted you wont be able to run the same amount of boost like a t2 does, but itll still make the car more fun to drive...

isnt there a way to adjust the throttle? i thought there was a set screw on the lever that allows for very minimal amount of adjustments?
i had to up my idle about 200rpm after my build for some reason, but once it warms up it idles nicely at about 700-800rpm

20Bforme

so essentially... youll be turboing your N/a motor... am i correct?


if so, read through this stuff: (taken from the FAQ)

also... with your idle issue... did you check the TPS?

smokimon001

there is a set screw on top of the throttle body cover by a rubber cap, yea, i had that adjust, does not work, and i did adjust the TPS million times, before and after replace the throttle body.

the onlything give me steady approx 1000 rmp idle was when i used a pliers to clamp on a air hose(maintain a small amount of air flow) that goes to the idle air bypass valve.

i just check out the turbo II car last nite, i can use all the body parts, but some turbo components and harness are in teh bad shape.

and i see most ppl dont recomand to have s5 swap to s4, cuz harness are totally different. so 89-91 turbo swap is a "NO" to my 86 GXL?

so S4 turbo harness are same as S4 N/A(from other thread)? except few extra plugs? "SPEEDMETAL7" mentioned "The 86 and 88 have completely different wiring harness for the driver side", i am getting lil confuced.
If i am getting a complete swap(engine, tranny, ecu, harness....) what yr/series do u recommand?

this is gonna be my first swap if i will do so, i just wanna gether all the info to make it easier for me.

i love my RX7, sad to see her sitting around

satch

iTrader: (1)

Before the screw on the throttle body is adjusted the initial set coupler is to be jumpered as stated in the FSM. Did you jumper it?

smokimon001

i am not sure what exactly "jumper the initial set coupler" means, advices please.
all i did was adjusted the TPS voltage and resistant.

satch

iTrader: (1)

You stated previously that you adjusted the screw on top of the engine and it did nothing. But anyway, there is a green plug with two wires located between the battery and the engine fuse box. This is the initial set coupler and it needs to be jumpered (as in a short length wire stripped at both ends and each end of the wire placed into the plug) before attempting to adjust the idle.

smokimon001

i may just have to go find my FSM and learn from there.

wthdidusay82

iTrader: (15)

Im just reading on this , i have a 88 na rx7 im probably going to turbo..alot of this terminology i dont understand, probably better with a picture of what exactly a jumper looks like.

smokimon001

wtfdidusay82, u have idle problem too or just wondering?

SpeedMetal7

Yeah...Theres 2 main electrical harnesses in the car, both eventually connect to the ecu....

Theres one that runs from the ecu thru the passenger side firewall, refered to as the Engine harness

and theres one starting at the ecu, running through the dash, it connects the heater,ac,dash,ign,fuse box,flash box....THROUGH the firewall on the driverside, connecting the starting circuit, tran sensors, alt, main fuse box, headlights, and a few other things....

I just ripped the motor out of my 86 6port turbo, and dropped it into an 89 na body........
Motor/tranny bolted right in....
Just had to flop the wiring for the rest of the car...

SpeedMetal7

so, basically, i read something over....

Youll need either A) whole t2 car B) entire front clip of car ......or C) a very excellent wiring diagram and some knowledge on how to splice the harnesses together, which is, not a very smart idea...

My older bro did this in a 85 300zx, went from na/auto to turbo/5spd..........and he thought the cars internal wiring was the same, and it wasnt, had a friend re-pin the harness, which he failed out, and my bro ended u going to the scrap yard and ripping the harness out of the car he got the motor from...

smokimon001

i heard swap a s4 turbo to s4 body, we can use teh existing n/a harness.
if s5 turbo to s4 body, we need to use the complete s5 harness that comes with the swap, i am afraid that the one starting from ecu, runs through the dash does not fit my car(s4)

20Bforme

this link was also in the FAQ... see how helpful that is?

https://www.rx7club.com/forum/showth...threadid=26647

http://www.rotaryresurrection.com/ro...conversion.htm

edit: more

https://www.rx7club.com/2nd-gen-archive-72/s4-na-turbo-swap-details-813825/

HAILERS

.

smokimon001

i dono how to upload image into this post, please go to the link above, i have these clipers unpluged, and i had 1500 steady idle, once i clamp on the hose(where right next to it, with a blue paper tape), the idle drop to about 1000 stable, does this temporatly solve my problem? or this is not a proper idle?

smokimon001

http://www.flickr.com/photos/23732694@N03/4561706961/

SpeedMetal7

that would temporarily solve it....

I have this guy, that does a job for me, involving inspections...

I took a 92 diamante there, he disconnected a connector and clamped a house, and it idled fine and passed the sniffer


Sounds to me like your having a vacuum issue, or a fuel issue, id start replacing every engine hose one at a time...................but yeah....


S4 -->s4 shouldnt have a problem, i would think the ecu for turbo and 6port would be different

s5---> s4 or vice versa, your gonna need everything.............

NoPistons!

iTrader: (3)

Dont worry about "harder".


Worry about experience and having fun.

Learning new **** and getting your hands dirty is awesome.