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Author Topic: Few issues: first start up 1g running on SD  (Read 1176 times)

2.3strokdtalon

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Few issues: first start up 1g running on SD
« on: November 08, 2011, 08:40:11 AM »
1992 Talon

Had a 2g maf installed. I wired in a GM 3.3bar. I currently do not have an IAT sensor to install, but i need the car to drive asap. In my experiences the IAT isn't "needed" to run it's there to adjust fuel at different intake temps. I zero'd out the IAT enrichment table because I thought that would help some. This is only temporary because the switch to SD wasn't supposed to happen today.  :( The map sensor is wired correctly per the instructions on here and the car idles fine, rich, but good enough.

Question is: If i'm not installing an IAT sensor what should I do with the MAF harness wires that would normally be used for the external IAT senor? A resistor of some sort maybe to give a constant 70*??
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Justin G.
10.4@142 (93oct)

hakcenter

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Re: Few issues: first start up 1g running on SD
« Reply #1 on: November 08, 2011, 09:07:53 AM »
Ya a resistor is good idea, somewhere around the 1900-2100 Ohm mark should be pretty close to ~70F
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AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.

2.3strokdtalon

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Re: Few issues: first start up 1g running on SD
« Reply #2 on: November 08, 2011, 09:13:04 AM »
Just wondering, I just tried to drive the car and under part throttle conditions there is a very violent jerking. Is this in result of not having an intake temp signal to the ECU?

And would the resistor go on the signal wire or between the two wires to emulate the IAT sensor?
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Justin G.
10.4@142 (93oct)

hakcenter

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Re: Few issues: first start up 1g running on SD
« Reply #3 on: November 08, 2011, 02:17:16 PM »
Quote from: 2.3strokdtalon on November 08, 2011, 09:13:04 AM
Just wondering, I just tried to drive the car and under part throttle conditions there is a very violent jerking. Is this in result of not having an intake temp signal to the ECU?

And would the resistor go on the signal wire or between the two wires to emulate the IAT sensor?


I couldn't tell you specifically, if you zero'd the IAT enrichment you are flying by yourself lol. I'd suggest leaving the enrichments alone, and using a 2k ohm resistor for the IAT.

http://wiki.ds-map.net/doku.php?id=sensor_installation

Take pin 8, make a wire maybe a couple inches long, then solder a 2k resistor on it. On the other side solder another wire, and connect it to pin 6, which is the ground. You should be good to go on that for basics.
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AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.

2.3strokdtalon

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Re: Few issues: first start up 1g running on SD
« Reply #4 on: November 08, 2011, 07:07:24 PM »
Thanks Hak. So, I'm going to change the IAT enrichment table back to the base settings and solder in the 2k ohm resister between pins 8 and 6.

I guess the question I was asking earlier is, if not wired up correctly, does the ECU Intake Air Temp sensor revert to a stock value? Sort of like how the ECU coolant temp sensor will revert to -40*F if there is no signal from the sensor. I'm going to retrace my MAP sensor wiring tomorrow, but I'm pretty sure I did that correctly. My map sensor source is the "P" port on the t/b.

I'm also having an issue with logging, but I'll start a new thread for that.  :(
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Justin G.
10.4@142 (93oct)

hakcenter

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Re: Few issues: first start up 1g running on SD
« Reply #5 on: November 08, 2011, 10:00:44 PM »
That is a good question, I'm not sure if the ADC would even read anything at all, since without a ground electricity isn't going to flow. It may think it is maxed out at 5v.. now you got me thinking.

You could always verify what it thinks the IAT is by logging, once you get it all sorted out.

No IAT it is still going to compensate somehow whatever the logged value is, i am sure there is a defacto 1.00 enrichment for it (which is 100%, no change).
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AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.

2.3strokdtalon

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Re: Few issues: first start up 1g running on SD
« Reply #6 on: November 09, 2011, 05:27:12 AM »
I'm using a GM 3.3Bar Map so selecting Delphi 3.3bar should be the equivalent?
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Justin G.
10.4@142 (93oct)

hakcenter

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Re: Few issues: first start up 1g running on SD
« Reply #7 on: November 09, 2011, 10:30:28 AM »
Yap
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AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.

2.3strokdtalon

  • JACKAL Owner
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  • Posts: 54
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.3L (stroked)
    • Head: 1G (large ports)
    • Turbo: BW S366
Re: Few issues: first start up 1g running on SD
« Reply #8 on: November 09, 2011, 06:31:56 PM »
I had GM3bar selected by mistake so that was possibly the violent jerking at part throttle.  :-[ I'm guessing the difference in voltage between the sensors is enough to do that. Do you agree, Hak?

Tomorrow morning I'll be back to work on this thing, so I'll post back all results.


PS...Radio Shack has a 2.2k ohm resistor. Good nuff?
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Justin G.
10.4@142 (93oct)

hakcenter

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Re: Few issues: first start up 1g running on SD
« Reply #9 on: November 09, 2011, 06:57:59 PM »
Close enough.

The map sensor setting is for the GUI, not for the car. If you really did a number on the IAT enrichment, I'm sure that is where the bucking came from.
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AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.

2.3strokdtalon

  • JACKAL Owner
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  • Posts: 54
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.3L (stroked)
    • Head: 1G (large ports)
    • Turbo: BW S366
Re: Few issues: first start up 1g running on SD
« Reply #10 on: November 09, 2011, 07:34:45 PM »
FWIW, there was no change in the bucking from zero'd out IAT enrichment to the base table. Idk what the fuck was causing it, but I hope I can figure it out. The car drove like a dream on the 2g maf.
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Justin G.
10.4@142 (93oct)

hakcenter

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Re: Few issues: first start up 1g running on SD
« Reply #11 on: November 09, 2011, 11:26:05 PM »
You able to log yet ?
Resized injectors etc ? Or they stock ?
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AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.

2.3strokdtalon

  • JACKAL Owner
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  • Posts: 54
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.3L (stroked)
    • Head: 1G (large ports)
    • Turbo: BW S366
Re: Few issues: first start up 1g running on SD
« Reply #12 on: November 10, 2011, 04:23:28 AM »
Injectors are 780cc so I think I have it set to 789cc and I increased all deadtime cells +300. I'll find out in about an hour if I can log.
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Justin G.
10.4@142 (93oct)

2.3strokdtalon

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Re: Few issues: first start up 1g running on SD
« Reply #13 on: November 10, 2011, 05:37:06 AM »
I just tried to log for the first time so I highlighted IAT and MAP. I then clicked poll, and watched the little spinning flower for a good 5min. I also tried it again and clicked log with no change.
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Justin G.
10.4@142 (93oct)

big_d

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Re: Few issues: first start up 1g running on SD
« Reply #14 on: November 10, 2011, 08:10:52 AM »
I would tee the FPR vacuum line for the map sensor.  I had an issue on a friend's car that I was tuning, where the line for the map sensor was attached to the throttle body.  It just happened one of the tiny vacuum holes pre-throttleplate.  After moving the map sensor post-throttlebody plate, the car ran wonderfully. No more hesitation, bucking, stumbling.     ...it's just a thought, give it a try.    8)
The process for logging is...
1)Click poll...and watch the thingy go round and round
2)Select the values you want logged (you can click on the numbers beside the name to graph them on the logging screen.
3)Click the Log button. (it will stay shaded until you want to stop logging)
4)When you're done logging, click the Log button again. A window will appear and prompt you to save the log.
...I typically roll around town with Poll always clicked.
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