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VSS Pull up on 1995 NA

 
Old 09-30-2018, 10:24 PM
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Default VSS Pull up on 1995 NA


Diyautotune told me I needed to install a new sensor to add VSS to my car. After reading here, I see this is not true and that I just need to run a pull up. I have 2 questions:

1. To get my computer to read VSS and ultimately see what gear I’m in, I need to run a 5v power output with a 1k resistor to my 3I pin on my cars harness before the MS3PNP? Will this then automatically give me speed?

2. What other info can I get from my car by running pull ups? Sounds like there may be ofther info I’m missing out on like knock? How many pull ups can I run per 5v output?

also, 4K for power, run a 1k resistor to 3I? Or to 1m? 3I was mentioned in a different thread but 1m looks like what I want per this pinout





Last edited by Wulfensteinster; 09-30-2018 at 11:28 PM.
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Old 10-01-2018, 04:19 AM
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no pullup needed for VSS. On 94-95, VSS is on 1M. Just connect it to a digital input.
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Old 10-01-2018, 07:55 AM
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Originally Posted by WestfieldMX5 View Post
no pullup needed for VSS. On 94-95, VSS is on 1M. Just connect it to a digital input.
disconnect wire from 1m and send to digital input on the options plug? Easy enough..

if no pull up is needed, why doesn’t 1m give a good signal for MS where it’s at?


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Old 10-01-2018, 11:03 AM
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Got it done. Just wired 1m into digital requency 2 on my options port. It works!
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Old 10-01-2018, 11:15 AM
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Which MS do you have? I have the MS3PNP pro, was supposed to work out of the box but I had to make some base map tweaks.
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Old 10-01-2018, 11:16 AM
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I have the same computer. I used base map. Tuned it a little to spring pressure, then added an EBC and took it to a tuner for flex fuel blend
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Old 10-02-2018, 09:46 AM
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Originally Posted by Wulfensteinster View Post
I have the same computer. I used base map. Tuned it a little to spring pressure, then added an EBC and took it to a tuner for flex fuel blend
Interesting. I had to do absolutely no wiring mods.
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Old 10-02-2018, 09:49 AM
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Originally Posted by Stealth97 View Post
Interesting. I had to do absolutely no wiring mods.
you have vehicle speed and gear? Why does your speed and gear page look like? Whatís your VSS input?
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Old 10-02-2018, 12:43 PM
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I have vehicle speed and odometer, and its accurate. I have not tried gear yet, I usually know what gear I'm in.

This is on my '95
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Old 10-02-2018, 03:20 PM
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Originally Posted by Stealth97 View Post
I have vehicle speed and odometer, and its accurate. I have not tried gear yet, I usually know what gear I'm in.

This is on my '95

Digital frequency 2 is the options port. So I never tried this before rewiring. Well, I returned the 1m to its 1 plug and left the configurations set to digital frequency 2 and sure enough. It still works. No rewrite needed with this ecu. Thanks!!
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Old 10-02-2018, 04:17 PM
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does this start cutting out at higher speed?
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Old 10-02-2018, 04:34 PM
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Originally Posted by psyber_0ptix View Post
does this start cutting out at higher speed?
0-100 is fine havenít tried any faster
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Old 10-02-2018, 08:33 PM
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Originally Posted by Wulfensteinster View Post



Digital frequency 2 is the options port. So I never tried this before rewiring. Well, I returned the 1m to its 1 plug and left the configurations set to digital frequency 2 and sure enough. It still works. No rewrite needed with this ecu. Thanks!!
Yeah they broke some of the pins out to the options port as well.
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Old 10-02-2018, 08:33 PM
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Originally Posted by Wulfensteinster View Post

0-100 is fine havenít tried any faster
Same here.
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