onebinky

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On my new setup, I am running a ford TB and TPS, and the resistance of the ford TPS is half of what the GM sensor is. The actual voltage reading takes better advantage of the 5v scale, going from .035v to 4.95v or so. The problem is that the GM ECM is looking for a higher voltage, and is tripping the LOW TPS code and is ignoring the TPS thinking there is a problem. I remember on the 165 I was running, there was a perameter for TPS voltage, but I donm't see anything in the 7730 program for it.

I figured I'd ask before I start playing around with resistors, since I'd rather change the code than the hardware.

Thanks guys.

RBob

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RBob.

onebinky

iTrader: (1)

So all I have to do is disable the flag, and it won't ignore the TPS anymore? That's pretty cool, I always thought it would just prevent SES from coming on

onebinky

iTrader: (1)

It turns out it was a bad connection at the sensor. I fixed that, and it was telling me that idle was 10%, and WOT was 14%. I remeasured the resistance readings, and they aren't on the same plane like I originally thought. I will have to find a way to make the GM sensor work, which is what I've been playing with for the past couple hours.

InTech

83E4,5 are your throttle angle calculations. 5/255 =A/D count for min tps

onebinky

iTrader: (1)

Thanks for the info, I might yet need to use it depending on if this sensor is mounted a little "off".

The GM one is mounted up and seems to be functioning. No more horrible stumble as soon as I crack the throttle. I'll start some datalogging today and see how far off I am on the min/max values.

onebinky

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OK, I tried adding that item into my ECU file, and I don't think it's working. I told it to display the value as a hex so I can see if there is any data there, and it is coming up as 00. What am I doing wrong? Sorry for the basic Q, but it's my first time doing this.

onebinky

iTrader: (1)

I also tried searching for "105", which is the number next to the one you gave me. The search feature in tunerpro is telling me that address 105 is part of the main timing table

I really need some help...

Z69

$83E4-$8000 is the address IIRC when using a hac.
Meaning you need to sub $8000 from all $8D hac addresses to get the TP setting.
This is due to the fact that the bin is loaded at address $8000 on the chip. But the actual address in the bin file is xxxx-$8000.
Gets tripped over all the time.....

onebinky

iTrader: (1)

Cool, got it figured out thanks to you guy's help

Now that I have it entered in though, it looks to be the boundaries for the service enine mode. Is there a way to change the actual max tps voltage to around 3.5v, and min voltage to just above 0v?

onebinky

iTrader: (1)

Nevermind, with that info I should be able to use my ford TPS, right?

All I have to do is change the min TPS angle to 0v, and it will automatically scale for the higher 4.95 max throttle voltage, right?