gpmm ls3 controller help

[68sixspeed]

the fan wire from the GMPP is +12v high current, no additional relay needed for the primary fan, but as you noted an extra relay will be needed for the a/c controlled fan. Factory setting was up around 220f and I think even with HP tuners I could only get it down to something like 209 degrees. (*unless something has changed on the software, that has been a few years since I last used it)

[icemanrd19]

did you see the link i posted? shows to turn two fans on two different settings.

[68sixspeed]

yes, but it didn't mention providing an a/c overide did it? I really didn't click with me on the "why", a simple on/off does the job just fine. Unless the fan you are using is made to run low/high then I guess that is a benefit but I don't know if running a single speed fan at lower speed could cause it to have issues with the motor overheating etc.

[icemanrd19]

which one is correct? I need the AC override to be a 12v signal which my GMPP signal is.

Feed coming from the 30 post on the Vintage air relay?



Or feed coming from the 87 post on the vintage air relay?

[icemanrd19]

Anyone extend the fuse box wires? Really not liking any location under the dash and I'm thinking about extending the fuse box wires so i can place the fuse box in the passenger side fender by the headlight. Wondering if its easier to extend the fuse box or extending the engine connections with extension harness from spear tech

[icemanrd19]

Fired the car up today. Everything worked perfect the first time but the tach, oil pressure and speedometer. All 3 of these are connected to the fuse box bulkhead connector. I thought all i had to to is run that one wire to each of their gauges and be done with it? the tach moves little when revving. Im guessing all 3 gauges are not compatible with the signal that is coming out of the bulkhead. How can i fix this?

For the tach i need to make sure i have the gauge in the proper setting. http://www.autometer.com/media/manual/2650-1165.pdf

For the Speedometer i need to ??????????

For the oil Pressure i need to ????????? possible ground the gauge to the controller ground instead of the car?
" Oil Pressure Sensor (TAN/WHITE STRIPE) – This is a zero to five volt output from the oil pressure sensor which can be used for monitoring oil pressure (Pressure (psig) = [32*Sensor Voltage]-16). See Chart Below. Use the ground wire in the bulkhead connector as the low reference (ground). Ground (BLACK) – This is used as the low reference (ground) for completion of the MAP, TPS, and oil pressure output circuits. It can also be used for modules connected to either of the fused 12v outputs.

Besides that the car sounds mean. PCM of NC ac bump and dual fan kit worked like a charm. Highly highly recommend.

[1989GTA]

I had to use a pull-up resistor on my tach wire for it to work. My speedo came out of a port on the ECM. Oil pressure I do not know. However having proper grounds is very important. I have the E38 ECM.

[icemanrd19]

https://www.facebook.com/rodney.moor...3664080007719/

what kind of tach did you have? I have to look at mine but i think if i have that switch in the back i just need to put it to 4 cylinder mode

[1989GTA]

https://www.facebook.com/rodney.moor...3664080007719/

what kind of tach did you have? I have to look at mine but i think if i have that switch in the back i just need to put it to 4 cylinder mode

My tach is made by Speedhut.

[dhutton]

I had to use a pull-up resistor on my tach wire for it to work. My speedo came out of a port on the ECM. Oil pressure I do not know. However having proper grounds is very important. I have the E38 ECM.

I had to use a pull-up. 4.7k ohm if I remember right. If it's not reading anything then 4 cylinder mode won't fix it. That just makes it read twice as high. What kind of oil pressure gauge do you have? I normally use the sender that came with the gauge.

Don

[icemanrd19]

autometer oil pressure gauge

The gmpp kit said the tach would need to be a two signal gauge. The gauge moves when revving but thats about all. Used it on on my stock 350 that was in there. Worth a shot. To rewire a entire car with AAW, GMPP, install LEDs, ls3 yada yada yada and only 3 gauges don't work out of the entire build the first time is pretty good.

[andrewb70]

Autometer makes some adapters to put their oil pressure sender in the port that is located behind the intake in the valley cover. I did that with my GTO.

The tach needs a pull up resistor, as mentioned earlier.

For the speedo I never made that work with the GMPP speedo output because I don't have the VSS going into the ECU (I have a Richmond 6 speed). Eventually I got my speed working by getting a signal off the ABS sensors on my ATS spindles which use C5 hubs.

Andrew

[icemanrd19]

switched the tach over to 2 pulse mode and nothing. Guess ill try the resistor

[andrewb70]

switched the tach over to 2 pulse mode and nothing. Guess ill try the resistor

https://www.pro-touring.com/threads/...259#post389259

Andrew

[1989GTA]

I believe I used the 1K pull up resistor myself. Very little current so a 1/8 watt would be big enough.

[icemanrd19]

A tachometer signal is included in the bulkhead connector (see below). This is a 2 pulse/rev output which may correspond to
a 4-cylinder setup in some tachometers or transmission controllers. Note the signal is a low voltage square wave, some tachometers or transmission controllers may need a pull-up resistor in order to read the signal, similar to a 5000 ohm, 1⁄4 watt resistor– this detail is left to the user. The following circuit has worked for numerous devices – the resister value may need to be changed if your device does not read this output properly.

Looks like ill get some resisters then. seems like you used the 4700 so ill get a few of them.

What about the oil pressure? its stating to use the ground wire in the bulkhead as a reference ground. I didn't know the gauge had two separate grounding points for that.

[130fe]

I am using the oil pressure signal from the bulkhead fitting for my VHX gauges. I had to select the CAN setting on the gauges for the oil pressure to work. Like Andrew talked about, if you are not using a CAN compatible style gauge, you are going to have to use the adapter for the type of gauge you have. . I have used one that fits in the oil filter housing without any issues when I had auto meter gauges.

[icemanrd19]

i ordered a 4700 and a 10k 1/2 watt resistor. I noticed some are using 1/4 watt resistors. When it comes to which i should use I'm clueless to why

[dhutton]

Either 1/4 or 1/2 is fine. Max power is roughly 144/4700 watts. Either value will likely be fine.

Don

[icemanrd19]

resistor worked for the gauge, speedometer works as well.

Oil pressure gauge still doesn't work. I could just mount the sender in the oil filter block off plate but i was hoping i could use the bulkhead. Waiting to hear back from GM. Would be nice if a resistor fixes this as well.