S5 turbo swap -> vacuum/boost gauge not working
#1
S5 turbo swap -> vacuum/boost gauge not working
Car - 89 GTU
I have swapped this car to turbo and manual transmission. The car used to be automatic. I am not getting any reading from the vacuum/boost gauge in the stock cluster. I know how much better an aftermarket boost gauge is but want the stock one to work too. I have searched but have not found anything specific to my application.
I am using all USDM S5 (N370) electronics. This includes the ECU, AFM, MAP sensor. The car runs and drives fine. I know I have a good vacuum source connected to the MAP sensor. I have tried the auto and manual trans gauge cluster sub-harnesses. I am using a NA EM harness. From looking at the wiring diagrams, the cluster sub-harnesses look the same from NA to turbo.
Any help would be appreciated. Thanks
I have swapped this car to turbo and manual transmission. The car used to be automatic. I am not getting any reading from the vacuum/boost gauge in the stock cluster. I know how much better an aftermarket boost gauge is but want the stock one to work too. I have searched but have not found anything specific to my application.
I am using all USDM S5 (N370) electronics. This includes the ECU, AFM, MAP sensor. The car runs and drives fine. I know I have a good vacuum source connected to the MAP sensor. I have tried the auto and manual trans gauge cluster sub-harnesses. I am using a NA EM harness. From looking at the wiring diagrams, the cluster sub-harnesses look the same from NA to turbo.
Any help would be appreciated. Thanks
#4
Sharp Claws
iTrader: (30)
maybe satch can help with the wire pinouts, it's been a few years and i only have experience with the S4 on a turbo swap with cluster.
there will be a wire from the boost sensor to that kick panel connector, the wiring for the round connectors at the cluster have a few different wires, one now leads to the boost gauge so will need that moved around to meet up with the wire at the kick panel connector.
all you need to do is transpose the n/a cluster connector over the turbo one, and then the XD-1/2(i forget which) at the kick panel which i believe originally was the alternator charge wire on the n/a harness, the turbo harness has different pin locations so the wires will be slightly different if you used the turbo harness and it should be in the correct location already.
cliffnotes: go into the manual and pull up the wiring diagram, pull the diagram of the cluster for n/a and turbo and the engine harness to front main harness(dash harness) for n/a and turbo. compare the 2 at both ends and move the wires around or make a new one.
there will be a wire from the boost sensor to that kick panel connector, the wiring for the round connectors at the cluster have a few different wires, one now leads to the boost gauge so will need that moved around to meet up with the wire at the kick panel connector.
all you need to do is transpose the n/a cluster connector over the turbo one, and then the XD-1/2(i forget which) at the kick panel which i believe originally was the alternator charge wire on the n/a harness, the turbo harness has different pin locations so the wires will be slightly different if you used the turbo harness and it should be in the correct location already.
cliffnotes: go into the manual and pull up the wiring diagram, pull the diagram of the cluster for n/a and turbo and the engine harness to front main harness(dash harness) for n/a and turbo. compare the 2 at both ends and move the wires around or make a new one.
Last edited by RotaryEvolution; 09-03-12 at 01:27 PM.
#7
Moderator
iTrader: (1)
I use the same site for diagrams so this diagram is not that much help since it shows a volt gauge for both NA and turbo which we know is incorrect. The wire that you tap into will be new at pin 2H but it can be run to where the original alternator wire is as Karack mentioned and then picked up from there as it then runs to the gauge.
Correct S5 Turbo diagram in this link.
https://www.rx7club.com/attachments/...olsystem12-jpg
Correct S5 Turbo diagram in this link.
https://www.rx7club.com/attachments/...olsystem12-jpg
Last edited by satch; 09-03-12 at 02:06 PM.
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#10
i think it's the only diagram. at least that i've seen. i'd rather tap into the cluster wiring than the alternator wiring. it would also be a much shorter wire that would need ran. as far as i know, the only difference in clusters is the volt/pressure gauge.
#12
Hey I have had my car for a while and always wanted the stock one to some what work. I saw your thread about it and was wondering if you ever figured it out. If you did it would be great if you could let me know what you did. Thanks.
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