as the title says im looking to wire an s5 t2 tps into my s4 turbo. just bought a whole s5 t2 uim so i think ive got everything i could need. diagrams would help. thanks!

 

I believe the S4 TPS has three wires wheres the S5 has 4 wires for both narrow and wide range. I don't know much about it, but seems like you could find the right wire (narrow or wide) to get the signal you need to the ECU. But, then again, I don't know much about it. Good luck.

Edit: My bad, looks like the S5 has two TPS units??? I guess maybe you can pick one of them and wire a connector so that it mates to the harness connector with the appropriate wires? Or you could just find a good S4 one.

 

Check this link, you might find it useful... don't know.

http://www.nopistons.com/forums/Tps-...ng-t51790.html

 

the only way I see a S5 Tps going on an s4 is to use ONE of them.
Why not just use the S4 Throttle body??.that eliminates Problems.

 

the only thing full range in the s5 is the MECHANISM,, the cam that drives the second TPS
the TPS units themselves are the SAME,, the SAME as the s4 TPS
the only difference is the use of the common plug for both units in the s5,, with the full range TPS having a colour change to the output signal wire
---they have exactly the same output ranges as one another ---


i have in the past successfully swapped the TPS units for one another when faulty

ie,,
when cut off and rewired to a single plug ,, each s5 TPS is in fact identical to a s4 TPS

in the s5,, one follows the original cam mech that the s4 has
ie basically all out position when the throttle is opened slightly
the other TPS follows the new cam on the s5 TB so as to represent a full range of the throttle position

the second full range TPS is used exclusively for the electronic oil metering pump
-- the ECU still takes its cue from the narrow range unit for fuel and IG controls

the full range TPS would have advantages if wired to a aftermarket ECU that actually uses TPS mode mapping
ie,, like in a BP ,, where vac signals are rather vague and manifold pressure inputs are less than accurate in representing true engine load

if programmed in MAP mode ( about 90% of all tunes are in map mode )
it will have no use except to determine the idle position
( which is what the narrow one is doing already )


if you intend to use the s5 manifolds,, you can simply retro the s4 TB
( which will bring the OMP cam linkage that s5 does not have )

alternately,, you can cut the plug from the s5 TPS's and wire either the narrow or full range TPS to the ECU,, and premix instead of having an OMP rod cam link to the TB
( using the full range may have issues in some primitive ECU's in determining the threshold of idle unless the ECU has an adjustable setpoint threshold )


the ONLY reason a full range TPS would be a better pick is if you intend to use throttle position mode for load mapping
( or as in some ECU's a combination of MAP and TPS load sensing )
the ONLY time i see that as the viable alternative is when mapping NA BP's

 

That's good info. I've never had an S5 so I've never messed with one of the TPS's on them. Looks like the original poster has several options now.

 

im running a power fc and i was told that a full range tps would solve my decel problem

 

car stalls if you rev it up out of gear and let off

 

Yep I would suspect you'd need the full-range S5 TPS for off-throttle and accelerator pump functions. Don't know how to wire it in, however.

B

 

How to wire The s4 tps with a s5 ecu help please

 

Any wire schematics for s4 t2 tps goin on s5 t2 harness And ecu

 

easy, swap the throttle body.

the S5 will work on a S4 and premixing the oil but the series 4 will not work on a series 5 without major modification to the throttle body/throttle cams.

 

My reply was old on this thread but I can see now that the s5 TII TPS will not attach to the s4 TII TB.
Bump Start says use the CAM,which would variate the TPS a bit..
Yep..There IS a thread on that.
I already got my car running on FD stuff..and a Haltech...I really hated those damn Plunger TPS's!

 

Correct I got s4 tb with s4 tps going to s5 harness and ecu I need wiring diagrams to hock up the narrow signal on the single mode tps to the s5 dual range tps wire harness any info will be appreciated thank you

 

Look at the upper left of the diagram provided. Bottom three wires of the S4 TPS runs to the three wires of the S5 ECU. Green/Red wire of S4 TPS to pin 2F of the S5 ECU. S4 TPS Brown wire to pin 2I (vref voltage) of the S5 ECU, and the third wire of the S4 TPS, Black wire, goes to Pin 3C or 3D odf the S5 ECU.

https://www.rx7club.com/2nd-generati...wires-1013741/

 

i'll throw in my 2 cents. Everyone said THIS could not be done: S4 throttle body, notice the mechanical OMP lever? S4 TPS... what's that? A haltech e6k?!


what had happened was I was looking for a STOCK throttle body with thermowax and everything still attached. When I bought one years ago, the seller through in an extra they just wanted to get rid of. What I discovered was this:

it SEEMED to be factory. The nuts and bolts were really on there. It had the S5 tps, but the S4 omp lever? It also had the S4 thermowax. But it had less "ports" for vacuum hoses than normal. I'm thinking it came from another country/region where the car sold in early 89 as a series 5? Who knows, but it was interesting. And it works!