Those with ISSPRO Turbo temp monitor, I have a question

[CoreyPerez]

Hey folks,



I've got all my gauges, TST #6 & Temp monitor, any don't have any problems with anything other then the temp monitor. I didn't realize until after I noticed that the temp monitor wasn't working that the instructions depict that the monitor is wired into the connections at the probe, but also show wires going from the gauge back to the ISSPRO unit. Am I correct in understanding that this won't work because of this? If so, can you please explain why? I'm mostly concerned with just getting it working. I'd hate to think I spent over $100 for something that isn't working! I've rechecked all my wires and everything else is in order. Any help would be GREAT!



Thanks,



Corey

 

[jwdeeming]

Corey,

I have my TTM wired to the gauge, not the probe, and it works fine. My Phord buddy had to send his first TTM back because it was defective. If you're satisfied you wired it right, call customer support where you bought it from and see if they'll help.

I also know that a loose wire on the probe or gauge, wherever you wired it, can cause it to fail, but you'd probably notice that your gauge wasn't reading right.

JimD

 

[JoelPry]

If Im understanding you correctly, youve run two sets of wires from the probe/gauge to the monitor? If so, you only need to run one set to the monitor, either from the probe connections or the gauge connections. Does the monitor do anything? When I wired mine up the only trouble I had was with the add-on relay assembly for the airbag lights, etc. If you have a test-light, check to make sure you have 12 v at monitor itself

 

[Steve St.Laurent]

I can't quite understand how you have it hooked up by your message. Starting at the pyrometer how do you have it hooked up? For example. from the pyro the leads are hooked up to the gauge, then there are two wires running from the two posts on the gauge to the TC connections on the TTM. Then post where you have all the other connections on the TTM running to. With that I should be able to help you out.

 

[CoreyPerez]

mine is currently wired up to the probe, not the gauge. And all the other wires are as/per the instructions. It wasn't until I had the problem that I realised that they suggested wiring the monitor up to the gauge, not the probe, (confusing by the diagram) I'll see if I can figure it out this weekend. I don't know what else it could be though...



Corey

 

[Steve St.Laurent]

That could definately be your problem, the leads coming from the thermocouple have to be the correct type and length of wire for it to read correctly. By running your own wires all the way to the probe you're definately WAY off. They recommend running #22 (or larger) copper wire from the TTM to the gauge. In my case I put in a seperate thermocouple that is after the turbo (the one driving my gauge is pre-turbo) and had to buy a set of lead wires to run to the TTM. By running the copper wire to the gauge it will be off slightly but not by much. Are you running your thermocouple pre or post-turbo? There are differences in the pre and post turbo temps both while operating and when shutting down, at shut down depending on how you drove just prior to shut down there can be a drastic difference. There are times when my pre-turbo temp is below 300 degrees for 3-4 minutes before my post turbo temp is below 300, other times it's the same. Isspro recommends mounting the thermocouple after the turbo for shut down purposes.



You could also have the thermocouple wires reversed - it won't work that way (trust me - I made the same mistake!) If you have a test light you can connect it between the Lamp and Bat+ terminals, if the TTM sees the temp above 300 degrees then it will light the test lamp (the lamp terminal is switched to ground above 300). If that lamp lights then your problem is elsewhere too. But you definately have to change how your thermocouple is connected.



-Steve

 

[CoreyPerez]

I'll give your suggestion a try. One note, the wires for the monitor aren't connected DIRECTLY to the probe, they have a short lead from there. The directions state that you cannot change any of the length of wires, and I opted to connect at that location due to a mis-understanding of the instructions. But this weekend, I'll give it a try and see if I get any change from moving my connection to the gauge from the probe. Also, I have the light connected, and at no time has that illumintated. I also attempted to swap the connections from the probe around on the monitor (when I first noticed it wasn't working). Still no success.



As far as my probe's location, its pre-turbo. I know the temps may not be as accurate, but I would rather know pre-temps vs. post temps. I may install a probe post turbo at a latter point.



Thanks,



Corey

 

[JoelPry]

I ran the wires from the monitor to the probe, under the hood. My probe had little screws and ring connectors on the end and I just attached to that, the monitor works perfectly shuts off at 300 exactly. Like I said Corey, I would use a test light or gauge and make sure you have 12v at the monitor. Whenever I wire stuff up, I always troubleshoot from the easy to the hard.

 

[CoreyPerez]

Thats exactly the way I did it, I used the little screw thingies. I've tested for 12vlt + and everything is where it should be. My other option is to open up the unit and try messing around with the adjustment. Who knows, it could have been bumped in shipping.



I'll keep you posted, and thanks for all of your suggestions.



Corey

 

[Steve St.Laurent]

Can you have the test light hooked up while you're driving? If so try doing that and see if it lights up when your EGT's are up around 700-800 while driving. If it doesn't light up then you must either have a bad box or a bad connection somewhere - it wouldn't be an adjustment. Remember that the lamp terminal at the TTM will switch to ground when it's active, not to 12v - you need to attach the test light to any 12v source (BAT + is one) and to the lamp connection (which will be the ground). Another thing you do to debug it is to temporarily disconnect your EGT gauge and hook it up to the wires that you have hooked up to the TTM - that will make sure your wires coming from the probe are good.



-Steve