Oil temp measuring

[PJG1173]

good question. On my 8625 I'm already using b16 for the wideband, e3 & e7 for fan control, and I have a 4l60e.

[EagleMark]

Looks good Mark , just what I was thinking.

That with a sealing washer and it should be good to go .

Now where would we input it into say a '7427 PCM ?

TOM

When you had mentioned masaging it the light bulb went off in my head and I knew what you were thinking. So I used the bench grinder and slowly twisted it to get it narrowed down and when the threads were gone was thinking... hmmm... this has to seal, can't just RTV seal it in, it has to be like a drain pug! So I stopped grinding, next time I think I would use the drill in vise, or a lathe if my buddy ever get's his new one wired in shop!!!
But anyway spinning in drill the brass is easy to work, with a good file. Got it nice and round and the nut end smooth and flat for a drain plug sealing washer. Spinning stright in a drill at high speed has it very smotth and true! Then put the die in vice and threaded it into die with box wrench, once I got first thread or 2 going in straight it was piece of cake.

good question. On my 8625 I'm already using b16 for the wideband, e3 & e7 for fan control, and I have a 4l60e.

Greg had mentioned pin B5 for tranny temp but your already using it? Since mine has a manual that's where I plan to go. Found some other extra pins on 16197427 wiring diagrams that someone obviously figured out how to use E3 and E7 for fans! So still has A11, A13, B1, B4, B7, B14, F4, F5, C1, C2... so would need to figure out what they do and do a hac in XDF and ADX like the fan relay project and POOF! One more cool thing to add to $OD type stuff.

93V8S10 has so much time into these he probably knows already what would work and what would not? We're going to have to find him a job where he can spend more time on internet!

[RobertISaar]

http://www.exatorq.com/ludis_obd1/schematics.html

you might find some extra 7747 A/D pins(uses same board as 8746?) there. no 7427 though.

Ludis was quite a pioneer.

[93V8S10]

[QUOTE=EagleMark;6967] So still has A11, A13, B1, B4, B7, B14, F4, F5, C1, C2... [QUOTE]
A11 = unknown

A13 = HIGH A/C PRESSURE RPM COMPENSATION
AC High Pressure Switch
Must be grounded for normal idle, open for higher idle. AC doesn't need to be on. No known bins with this active.

B1 = DIS Ignition System
1 X Signal for ASDF (Alternate Synchronous Double Fire)

B4 = Sensor Ground
MAP, IAT, Transmission
MAP (A), IAT (B), and Transmission Ground (M)

B6 = May be a 5V reference output

B7 = Knock Signal (THIS MAY BE WRONG! Anyone have a 95 P30 wiring diagram?)
ESC Module
Possibly for using old style under hood mounted spark module. Wire like 95 P30 Van.

B11 = unknown
B14 = unknown
F4 & F5 = unknown
C1 & C2 = don’t exist

Without knowing if we have another temp input, you would have to use the trans temp pin and modify the bin to keep the trans in normal mode. To use, you would have to drive the vehicle to warm it up, then switch wiring and bins for dataloging the oil temp. Really need another pin for this...

[PJG1173]

would this be something that could be datalogged via the extra inputs on the moates autoprom?

[EagleMark]

would this be something that could be datalogged via the extra inputs on the moates autoprom?

Yes!

There's some new wiring diagrams in $OE and $85 that may help?

[RobertISaar]

the autoprom being able to natively datalog a temp sensor is dependant on whether or not it has any bias resistors on the A/D channel.

since a temp sensor is basically a temperature controlled rheostat, the amount of resistance they produce to allow a certain voltage to remain in the A/C circuit, which is how the A/D system measures them.

simple explanation: feed 5V through a 4K resistor to a temp sensor, measure the voltage using a voltmeter between the 4K resistor and the 5V power source, you'll see 5 volts. now measure between the 4K resistor and the sensor, you'll see a different voltage, dependant on the amount of resistance from the sensor. high resistance = higher voltage. lower resistance = lower voltage.

now if the autoprom doesn't have any native pull up resistors, bit more difficult, since that essentially guarantee that there are pull-down resistors installed.

[EagleMark]

the autoprom being able to natively datalog a temp sensor is dependant on whether or not it has any bias resistors on the A/D channel.

since a temp sensor is basically a temperature controlled rheostat, the amount of resistance they produce to allow a certain voltage to remain in the A/C circuit, which is how the A/D system measures them.

simple explanation: feed 5V through a 4K resistor to a temp sensor, measure the voltage using a voltmeter between the 4K resistor and the 5V power source, you'll see 5 volts. now measure between the 4K resistor and the sensor, you'll see a different voltage, dependant on the amount of resistance from the sensor. high resistance = higher voltage. lower resistance = lower voltage.

now if the autoprom doesn't have any native pull up resistors, bit more difficult, since that essentially guarantee that there are pull-down resistors installed.

I wish I took the electronics course in high school but that was before EFI so I thought a waste of time... that said you can feed 5 volts from wide band O2 sensor in and use it, so would that answer the question?

[EagleMark]

I also have a printed 16168625 and I beleive 16197427 that both say knock is B15.

Where I saw C1 and 2 I don't know but your right not on these diagrams...

[gregs78cam]

Well I have a spare '7427 or two, so I disassembled it to try to figure out where these pins go, but.....is this a 3 layer board? That makes tracing it really hard.

[RobertISaar]

my 16149396 is a 4 layer board, so probably at least 3 layers for you.