I searched and couldn't find anything about this. What does it take to swap an S6 (FD) UIM and LIM onto an S4 turbo block? I know that the S6 manifolds flow better than the S4 manifold. Thanks in advance for the info.

Zach

 

http://www.sleeper7.net/~randydynoks...20manifold.htm

This is what I did. May not be the "right" way to do it but it worked for me.
chuck

 

Thanks for the info Chuck.

Anyone else have anything to input on this? I'm very curious to know. I know that the S4 intake manifolds leave MUCH to be desired so I'm looking for a better way to go.

Zach

 

I'm curious if anyone knows how to get the FD TPS to work with an FC ECU?

IE, If I were to cut off the plug on my TPS, and solder those wires onto the FD TPS, so that I could plug it into the FC harness.

Or is standalone the only way out on this? Sorry to thread hijack, but it goes along with the question.

 

I think you have to wire it so that only one sid of the signal is used. Like the s4 uses a narrow range and the s5 a wide and the fd uses both, so you just wire the appropriate side to the car its in.

 

Well, what terminals would this be?

Also, pretty sure the s5 uses both, 1 narrow band tps and 1 wide.

 

I'd also like to know if I have to order a special TPS for my Haltech if I switch over to S6 manifolds. Thanks again.

Zach

 

None of the FC guru's want to chime in here?? I would really appreciate the help.

 

The S4 TPS has three wires at the plug; Vref, ground and narrow-range signal. The S5 TPS has four wires in the harness; Vref, ground, narrow-range signal and full-range signal, with the Vref and ground wires splitting in two (one each per sensor) for a total of three wires at each sensor and six at the plug. The FD TPS has the same four wires at the plug; they don't split as the two sensors are combined.

You need to cut the TPS plug off the FC harness and connect up the FD TPS. The best way to do this is to cut the TPS plug off an FD harness and match the wires colours up. The wire colours are:

Vref -- brown/white (all models)
Ground -- black (S4) or brown/black (S5 & FD)
Narrow-range signal -- green/red (all models)
Full-range signal -- black/green (S5 & FD only)

If you can't get hold of an FD TPS plug, terminate the wires with narrow insulated male spade crimp connectors and plug them into the FD TPS.

The TPS pin layout from left to right (clip on top) is:

| Ground | Narrow-range signal | Vref | Full-range signal |

Or by colour...

S4: | B | G/R | Br/W | -- |

S5: | Br/B (x2) | G/R | Br/W (x2) | B/G |

For S4's the TPS's full-range signal pin is not connected to the harness, but it could be used for other purposes; an S-AFC throttle signal for example. For S5's the two Vref (brown/white) wires are joined together and two ground (brown/black) wires are joined together.

Disclaimer: I haven't done this myself, all I've done is match up info taken directly from the online copies of the 88, 89 and 94 Factory Service Manuals.

 

Thanks for the wiring help! Do you know if the Haltech TPS will work with either the S4 TB and the S6 TB?

Zach

 

The Haltech TPS will work on any TB you can make it fit on. You have to replace the S4's narrow-range TPS with the Haltech full-range one, but S5's and S6's already have a full-range TPS so it's easier just to leave it in place and wire it to the Haltech harness.

 

Thanks for the info! It is greatly appreciated. I think I sourced a manifold setup now and I'm just waiting to hear back from the seller.

Zach

 

Ok, the manifold setup I found fell through. So what does it take to get the S6 UIM and an S5 LIM to fit onto my S4 turbo block?