turbine

iTrader: (1)

can you adjust the tps with the values on the safc ?
rite now my safc says im at 3% throttle with the plates closed. isnt the idea to get the tps at 0 @0 throttle
will this be accurate
thanks

rs_1101

id like to know too. in the sensor chk it gives a throttle voltage value. maybe you should do another sensor chk when the cars hot.. that could be your problem.

ddub

If your S-AFC reads throttle when you aren't pushing in the gas pedal this is because the idle has been adjusted (up) via the throttle stop screw on your TB, or your plates are slightly stuck open.

casio

i believe its natural value when installed should be 0% and 100% at full. i'm not sure, but mine worked fine and the screw had been adjusted previously.

i was hoping this thread was addressing the problem with setting the TPS voltage at 1volt. my TPS voltage at idle is .2v and 4.2 at full open.

rs_1101

my throttle stop screw is all the way down.. it idles at 800 at the least... and i still get a 6% throttle. its also reading 1.6volts from my tps.

ilike2eatricers

Checked the tension on the throttle cable?

88IntegraLS

I get about 5% throttle at idle. Think about it. When idling, the throttle must be open a little bit to allow enough air in for the motor to run on @ 750 rpm.

As far as checking the tps setting on the SAFC, I do that too, using the 'sensor check' menu. Just turn the adjustment screw until it reads 1.00 volt.

rs_1101

yes. i have checked the tension. its been pretty carefully set.

ilike2eatricers

I get 0% throttle at idle. What kind of airflow is everyone pulling at idle btw? I pull about 1.0-1.3% airflow at idle.

casio

say, for instance, instead of even touching the screw, i were to just push the mechanism opening the throttle and adjusting the voltage. would this be as accurate? i'm only asking because mine reads .2volts, but i have about an 800 idle (i can richen or lean it to idle up or down some). if opening the throttle and watching my volts, 1volt is WAY above idle (even for a PPort; which i dont have, just saying).

88IntegraLS

I wouldn't know, sorry. I'm kind of a simpleton and do things like they say in the manual, at least when it comes to electrical cr%p.

rs_1101

im confused as to what your talking about. if you play with the tps plunger itll show changes in voltage yes. but to permanently adjust it you need to mess iwth the screw to set the armature to the desired length.

casio

if youre referring to me; i was talking about testing the rpm at 1volt. i was making the point that, at one volt, my car is no where near idle. i didnt sit there and unscrew the screw until it was at 2000 or 3000rpm just so it would read 1 volt.
all i was doing was testing rpm versus voltage. my car reads .2volts at 700 or 800rpm. its WAY above that rpm at 1volt. i wasnt using the screw, but my hand to raise rpm at idle.

i'm not trying to be repetative, just trying to explain what i was doing.

totallimmortal

I hope someone will chime in soon who knows for sure but it seems that since the TPS works on chaning resistance with posisition that if the input voltage is the same then the amount of resistance that it has at idle should read a certain amount of voltage. I was told this was one volt and this is what i adjusted my tps to read at idle. The screw on top of the dynamic chamber being to tight or loose will not afect tps the screw to adjust it is on the throttle. On my s4 I used the SAFC to adjust my tps to read as close to one volt as i could and that worked, something may be wrong if this isn't working for your car, but i'd wait for some1 else to chime in maybe icemark or aaron cake
also if you adjust the tps properly regardless of what method you use (voltmeter, LEDs, or SAFC) it still may read other than 0% at idle but should end up reading 0% after the car has run for a bit and you've hit the throttle at least thats how mine works

HAILERS

First you set you idle with a fully warmed up engine. The tps screw has nadda to do with setting the idle speed.

Second you go to Sensor Check on the SAFC, and look at the tps voltage.

Third you adjust the tps screw to show one volt on the SAFC. Done

That does not apply if you have a turboii car and are using the boost/pressure sensor for the *TPS* input.

casio

wow this is frustrating. i was searching for a pic of the S5 screw, but wasnt coming up with anything. one thread, which involved HAILERS and Kenteth, had links, but they're broke now!
remember this link, HAILERS?? http://sheepdog.ar2engineering.net/temp/turnme.jpg

wish it still worked... anyone have a pic on a server thats still there??

WAYNE88N/A

Got FSM???

Or Haynes...It actually has REAL pictures in it, lol...

casio

i found my (ghetto) Haynes. i'm searching through it now. you have a page number? (haha, i'm like a toddler)

poor_red_neck

Ok... question about this.

If your car is S5... the TPS should be hooked into the full range TPS.

The TPS adjust screw adjusts the NARROW range. Unless you are hooking up the tps to the narrow range just to adjust it... its not being done properly correct? The Fullrange is not adjustable, as far as the screw that adjusts the narrow range.


Am I correct on this?

-Jon

casio

hence my predicament! see, i thought the same about that screw. us S5 guys and gals have 2 TPS's. the screw, like the redneck said, adjusts the narrow range (i believe).

why are all the gurus S4 owners??

rs_1101

cuz s5's fall apart.
lol... the 2nd gen safc should learn throttle on its own right?
in my case, my tps reads high when its cold and lower (1v) when its warmed up.

casio

that was mentioned in some other thread. someone said, when cold, you may see 2volts. when warm, it should be 1volt. mine is always about .235-.240volts (idle).

totallimmortal

Based on the different voltage readings people are gettin at idle and that they vary from the .2 to the 2 volt range i'd say set your tps with the LED or voltmeter method rather than the SAFC

HAILERS

The engine being hot is for cars that are stock and have the thermowax/fast idle screw/cam etc. These things move the throttle linkage when the engine is cold. That's why on a stock car the tps NEEDS to be set when the engine is hot.

I don't have a series five so I don't know squat about series five tps. If you look in the fsm you'll find the approx voltage for the narrow and full tps for a series five tps, when the car is idling. It's called out in the Control Unit section.

Now that you know that I know NOTHING about series five tps.......I think they are not adjustable and you might have to bend the tps mounting flange. Did you notice where I said I know NOTHING about series five tps??????? Take heed. I'm guessing. I also guess they are self adjusting in some way????? See my disclaimer above.

HAILERS

In the following thread/link I'm attaching, it has a page from the series five fsm. It mentions at the bottom something about a series five and the ECU making a self adjustment and indicating no adjustment needs to be made to the tps on a series five.

I'm guessing things could be tweaked a touch.

https://www.rx7club.com/forum/showthread.php?t=360869