eyecandy

iTrader: (19)

I am having problems with the initial setup of the SAFC II (or atleast I think I am). Its a S4 TII and I have the TPS line wired into the pressure line at the ECU. When I set the number of cylinders I have it a 4 and I hae been reading that the thorttle should be with the arrow up, but when I have the arrow up the engine will only turn over, so I put the throttle to ** and it runs. When I was in the sensor check with the car off it reads:

In-1 about 3.5v
In-2 0volts
Thrt 2volts

Then with the car running the Thrt is about .89volts (I cannot remeber the others)

But in the monitor mode I get 0% for the throttle (at idle and if I rev the engine), is this normal when running off the pressure line? Do I still need to set the throttle even though I am running off the pressure line?

After doing alot of searching (about 25 pages) I read a few that wired the throttle line to the tps, and set the lo throttle at 98 and hi throttle at 99 (and some had it set at 70lo and 99hi). Which set up is better for the S4 TII's? The tps or boost? Will fuel consumption, accuracy and tunning differ between the two?

I also noticed that the rpms on the SAFC were about 5-8% lower that the Tach, which is correct? Also I assume the knock sensor part of it is point less, i hooked it up anyways. Thats all I can remeber right now, thanks for the help!

HAILERS

Ok, I'll give it a try:

With a cold car, not run at all in the last 24hrs. I went out and turned just the key to ON. I took the safc in hand and went to ETC.

I went to SENSOR TYPE.....It should read FLAP

I went next to SENSOR NO.....It shold read 05_____05

Then I went to CAR SELECT and it should read CYL 4 and the arrow pointing up and to the right.

Then I went to SENSOR CHECK

There on IN-1 I read 3.894 (AFM)
There on IN-2 I read 0.085 (ain't nothing connected there)
There on THROTTLE I read 2.275 (it's connected to the Pressue Sensor not the TPS)

And my oil temp (in pan) is 165 degrees
My water temp is 178 degrees
My EGT is below the first reading so it's unknown
My AFR is 13.0
My SAFC rpm is flopping on either side of 750
My car's rpm shows 750/760 (splitting hairs, hey its not vernier!)

Now I'll go back and read what you wrote.

Now I warm up the engine and go to SENSOR CHECK and I read:

There on IN-1 I read 2.70 volts (AFM)
There on IN-2 I read 0,065volts (nothing connected there).
There on Throttle I read 1.23 volts (Again, the Pressure Sensor)

Now I go to MONITOR:

AF..I read 1.0 Percent
Throttle ..I read 11 Percent (remember it's the pressure sensor not the TPS)

My other car is connected to the TPS instead of the pressure sensor. I ain't givin out reading today on that one. I'm lazy.

eyecandy

iTrader: (19)

Thanks! for checking the numbers, you don't have to check the one with the tps (unless its a S4).

So the sensor check it about the same for both of ours when on and off which is good. When in the monitor I get the AF 1% and the throttle allways reads zero, hmmmm, I do have the ** instead of the arrow up, which might be the problem, and I have it set that way because the car will turn over but not start, like it almost starts then dies. I double, triple checked the wiring and it is all correct.

HAILERS

Tell you what, start the car what ever way it will start and let it fully warm up.

Then go to CAR SELECT, and put in 4 CYL and the arrow to the right and up.

Here's a helpful hint. Get access to your afm. Turn the key to ON. Put the safc to SENSOR CHECK. Now push the vane all the way back and HOLD IT THERE FOR A COUNT OF TEN TO FIFTEEN SECONDS, then let it go.

Now call this goofy or what....but the safc needs to see what the full voltage out of the afm is so it can *learn* what is expected?? Yes, that's it.

Anyway, I NEVER have seen on MONITOR, set to AFM a percentage greater than 92 percent ever. On either car. Just some FYI stuff in case your interested.

And I DO think you have a slight miswire on the pressure sensor. I'll be back in a moment.

HAILERS

DP ......DOG POOP POST

HAILERS

A question or two is needed. About the GREY wire that should be going to the Pressure Sensor (throttle on the safc).

What color is that wire? Not the grey wire from the safc but the wire it is tapped into??? I'll be back momentarily. I'll try not to DP no more (my grammer really is better, I just like *no more right at this moment*.

OH! Important, do you have a digital meter handy????????

HAILERS

Actually....you might very well have all connected up right.

I might have fallen into a mind trap about the safc having to LEARN. So one thing I did to help it LEARN was to connecto a MITTYVAC to the Pressure/Boost sensor and apply 10psi to it for over ten seconds. In my mind what that did ....was drive the voltage output of the pressure sensor to its maximum output that the safc will ever see. Remember, this outfit has not seen that figure prior to you connecting it up. I figue it surely can't hurt anything to do so, but MIGHT help.

Or in lieu of that......go out and find a steep hill and go up that hill in full boost and hold it there for a few moments!. This could all be superstition. Can't hurt though.

But do reply about the wire color and if you have a meter.

HAILERS

Well, I've got to go make some money.....but the guy on the other forum has a good reply. When in Monitor the percentage of *throttle* should not be reading zero. With the key to ON and no engine running it should be reading about 45 percent. What does yours read??

Does your boost gauge move up scale when you are boosting???? I don' t care about accuracy of the boost gauge...does it move upscale???

You should be tapped into a brown wire with a red stripe. It should still be connected to the ECU.

eyecandy

iTrader: (19)

Take a breath there! Thanks for the info, so I was out making money as well. and now I got to get my learn on So late tonite I can take a look at it again and try what you said.

I do not want to do any WOT, I only have 700 miles on my reman, I just wanted to get everything ready and I stumbled opun this problem with the SAFC....

So I need to run the tps line to BEFORE the FCD? Would that be betweent he pressure sensor and the FCD or between the FCD and were ever the line runs to then? I thought it made no differnece if the TPS line was tapped to the ecu or before the FCD.

HAILERS

I think it's more than a *before/after* the pressure sensor. I think there is something flat wrong.

That unit should be set to CYL 4 and the arrow up and to the right.

eyecandy

iTrader: (19)

Ok I just went back to check the #'s with the way its wired up now (throttle to pressure line at ecu) in the monitor mode with the car in the on position AF is 42% and throttle is 67%

In the sensor check it is still 2volts but I tried to apply a mightyvac to it, and for some reason I can only get it to 5 psi on the vac and at that point it goes to about 2.5v with the car in the on pos, with the enigne off.

Then I looked at the Throttle in the monitor mode with 5 psi from the mightyvac and it goes up to 76%.

Could the 76% be because it is wired at the ECU and not before th FCD? And I am not sure why I cannot apply more than 5psi with the mightyvac...

HAILERS

In MONITOR the AF should read on the order of .4 percent with the key to ON (engine not running).

With the engine running, the AF should read approx 1 percent (a fully warmed up engine idling at 750 rpm.

eyecandy

iTrader: (19)

Ok so I decided to take her for spin, and I was watching the thrt and it was reading as high as about 68% with boost gauge at just about 0psi, so I guess everything is kosher?

Something that was odd, after I started it up I check the cyl.sensor type and some how it was on 6 cylinder and the arrow was pointed, so i changed it to 4 cyl, and the in/out was 01/01 changed to 05/05, hmmmm how would have those gotten changed? I didn't do anything to them...

Also I noticed on my WB that I do not get full fuel cut on engine deceleration, it goes up to about 25-30:1 not the usual 40++:1. And the rpms are off, I know I stated that before, like at 3k its about 2750-2800 on the SAFC, does this pose a problem with tunning? So by calculating it will prolly be off by 500rpms when Tach read 7k... ANd which is accurate?

The AF was about 1% at warm up when idling thrt at o%and while crusing with the thrt at 0 it was about 4% crusing around 2500rpm, does this sound right?

Oh one other thing, the thrt, since wired to the pressure line will not raise from zero until slight load is present correct? So for exapmle to help explain it better if I hold the acclerator at 2500rpms the thrt will read 0%, right? And if I say punch it to 2500rpm the thrt % will raise becuase of slight load, right?

HAILERS

If your showing zero at idle (good compression/vacuum there) and you punch it, yes the percent should go upwards.

About the rpms.......the stock tach is optimistic by about 150 rpm when you holding a 2500 rpms going down the hwy. I say its the stock tach because I was watching the Fluke while at 2500 rpm and it was more in sync with the safc than the tach. At idle the safc and the tach were closer together along with the Fluke.

Come to think of it, I remember redlining the car several times in the past and the *Telltale* on the safc did not match the cars tach so to speak. When I say redline, I mean hearing the buzzer and letting off the throttle right then and there. So after letting off the throttle I took a look at the safc and the telltale was Below 7000 rpm. And I think the buzzer is supposed to go off above 7000 rpm. So yup, I think the stock tach is optimistic.

eyecandy

iTrader: (19)

I rewired the Throttle line to the line coming out of the pressure senosr to the FCD (to get a more accurate reading and because I need thats ame signal for my Dataloging with my wideband, and now I see 60% with car in on position/engine not running. But now when I drive up a hill and the stock boost guage is at 0psi the SAFC is showing 100%, is that because the actual boost is higher than what is showing on the stock guage because of the FCD?

I want to hook up a my friends HKS boost gauge to see how accurate or inaccurate the stock boost gauge is, is the best place to tap into the vac line from the line going to the pressure sensor? Or the BOV? Elsewhere?

Also now my engine stalls when I am coming to a stop, I went driving for about 2 miles and came up to 5 stop signs and it died at two of them...... Checked the settings and all seemed good...

Should I have reintialized it after I rewired the throttle line?

gsracer

Hah, cross forum posting?

To go along with my answer on the other forum, I forgot to add that you should just tee into the line that goes from the pressure sensor to the IM for the boost guage.