Just connected the fields vtec harness to the vafc.
While setting up my vafc.... (sensor check)

WOT
Pres: 2.830-2.835
Thrt: 0.435-0.440
CDS: 4.370-4.380

throttle fully closed
Pres: 2.835-2.840
Thrt: 4.575-4.580
CDS: 4.350-4.360

They seem ok, but I don't know what reading I *should* be getting for Pressure. Just wanted to check if the numbers were OK and if the Throttle Sensor Voltage should be the same at WOT and closed throttle.

Thanks in advance to anyone who can give me a quick answer. (Yes, i searched for a while.)

 

Check a thread by Black R, it should have ALL your answers

 

Thanks for the hint Dennis.

I found EXACTLY what i was looking for.

Now I just gotta turn the car on and check voltages......

FYI - field harness and vafc connected easily, just a few colored field harness wires that got ignored and a few unmarked wires got used in their place. For the price, you can't beat it for an obd2-obd2 extension harness.

 

I'm glad to hear it was worth the hassle.

Chris: I keep forgetting to show you the pics of the a/c lines!

 

I'll go start my car, you go take a pic of the a/c lines.

We'll see who gets back to the computer first.

Chris - who goes to start his kaa, which just came back VERY shiny and yellow from the body shop today.

 

Pressure sensor voltage read between .65 and .80... mostly .75. Supposed to be .94V. Guess I have that to figure out now....

Throttle % also seemed to barely respond at all. I'll have to watch it while I'm driving tommorrow.

Question: Does anyone know what my lower pressure sensor voltage (between .65-.80, compared to .94V, which it should be at) could mean??


[Modified by Chris N, 3:22 AM 1/17/2003]

 

Did you get the english manual?

http://www.apexi-usa.com

 

What the hell does CDS mean?

 

...for the lazy people who don't want to research.

https://honda-tech.com/zerothread?id=212783

Info from this post..:

 

Right. But i am under .94 volts, not over like listed above. I wonder if the same is true if the voltage is too low, like in my case.

Anyways, my connections must not be 'sufficient'. rpm's were off by about 500-1000 (to low on the vafc), throttle % wasn't always on and my car seemed to idle a bit more rough with the vafc (reset the vafc, yes). Any ideas anyone?

Edit: I took the harness/vafc out until i could check the connections, etc.


[Modified by Chris N, 9:36 AM 1/17/2003]

 

Ok - so how is your car running now? Did you have the connections soldered or just using connectors?

 

I used connectors. Maybe I should solder instead?

The *car* runs fine. The readings on the VAFC were not good, though. RPM was way off. For instance:

At 1500 RPM, where my car starts idling in this 15F weather:
The vafc read 950-1050

When my car finally returned to its indicated 800-900 rpm (on the tach) the Vafc was reading 400!!!

At 3000 RPM, the vafc read 1900-2000.
At 4500 (which is as high as I went on my relatively short commute), the vafc read no higher than 3200.

Throttle % seemed low, but then again, I drove very conservatively since the car really never fully warmed up after my 10 minute drive.

However, I noticed a surging sounds from the exhaust at idle with the vafc connected, yet no rpm change.


[Modified by Chris N, 10:19 AM 1/17/2003]


[Modified by Chris N, 10:23 AM 1/17/2003]

 

...thats usually a symptom of bad connections with the connectors. Try soldering them, it is usually the best way to go. Not to ask a dumb question, but you did have the rest of your settings correct, right?

 

Thanks for the help.
Settings were correct, yes. I double and triple checked everything, even making sure the correct wires were tapped.

I will probably solder them after work today, if I can get the connectors off.

Once I've soldered the connections, hopefully the Throttle Sensor Voltage will be more normal, as will the vafc's rpm readout.

 

good luck. let me know how things come out.

 

Make sure you have the set up correct, like the # of cylinders, throttle, and sensor in and out (six for both). One time my # of cylinders got changed to 6 and it showed a low low idle but really wasn't.

 

All the settings are correct.

I took out the connectors (cut them, actually) and stripped the wires a bit so i can solder later.

 

...get some heat shrink-wrap if you want a clean cover over the solderjob. just make sure you let it cool a little before sliding it over - otherwise it'll start shrinking before you cover all the solder.

 

everyone seems to have a different reading..what exactly is it?

 

ok i just checked mine..2 of the 3 sensors seem good..but my pressure one bounces around quite a bit...A LOt more then the others..any ideas on what it could be?

 

I soldered everything, pressure voltage is still .5-.7 and Throttle % is always wrong. It is almost always at 0, but occaisonally moves when a large change in throttle is realized. (I just typed this in another thread, hope it is similar!) On a good note, rpm is now correct. Anyone know what would cause the pressure (is this the MAP sensor?) to be this far off, voltage-wise, and why in turn the throttle % is the way it is?? Any help would be appreciated....


[Modified by Chris N, 6:12 PM 1/21/2003]