vrracing

iTrader: (1)

JDM S5 Tii in a 90 vert. RTek 1.8, 720 primaries, 1000 secondaries. SAFC Neo and Zeitronix WB.

Slightly bouncing idle when cold. Can die when letting off gas. Damn, sounds like TPS trouble!


My SAFC taps into 2G as does my Zeitronix. My tps lights were both off and I couldnt find a setting where they came on. I checked the resistance on the black and green wires of the TPS plug (with it unplugged) and the ohm ranges looked good. Randomly screwing the adjustment in and out and I stumbled on a single light, but it still bounces the idle.

I saw a 3 year old post by Hailers noting the 1V method at 2G. That car was an 88 Tii.

When I look at the S5Tii FSM on page F2-78, it says that 2G is the full range sensor and should go from 0.8v at idle to 4.3v at full throttle. The narrow range is at 2F and ranges from 1.0v at idle to 5v at full throttle.

That suggests to me that the S5 narrow range (pin 2F) is equivalent to the one-dimensional TPS on the S4 on 2G. Right?

If I hook the pin 12 blue 0-5v user input from the Zeitronix, I should be able to adjust both (narrow range on 2F) and validate (full range on 2G) TPS settings using the Zeitronix, right?

Thanks. Finally got the car close. Oh so close!

Jim

arghx

iTrader: (3)

you can just set them with a multimeter, although it's a pain. replace the little screws for the TPS with allen head screws or they will strip.

the narrow range tps on the s5/s6 cars is equivalent to the s4 TPS. I usually set that to .7 volts. full range I set to .4 I believe, double check the FSM. both should be 4.8-4.9 at WOT if the TPS is good and adjusted properly

vrracing

iTrader: (1)

Woah, you lost me! What little screws? There is just the big slotted screw for adjusting the TPS.

Here's the S5 Tii FSM



The numbers are listed there. Why would you set the narrow to 0.7v when the FSM says 1.0v at idle?

HAILERS

Seems that Blue wire would work and show the Full range. Let me know if it works, but I have a series four so it isn't pertinent to me.

The narrow should be approx one volt at idle, like you say. I believe on a series five the ECU does some internal adjustments to TPS signal during its life. There's some honorable mention of it in the series five FSM. I've no idea how that works. Anyway, it should be one volt at idle with a HOT engine (thermowax related).

I'm not familiar with series five/six TPS other than adjusting the TPS adjustment screw shown in the FSM. Maybe there's some screws on it that I don't see in the FSM graphics.

Narrow range is from your foot off the pedal til you apply pressure on the pedal and the secondary throttle plates barely start to open. Not much foot action for that to happen.

arghx

iTrader: (3)

maybe I'm getting a little mixed up with the s6/FD TPS adjustment procedure, although the TPS's are effectively the same in terms of signal output. the FD FSM gives a range of values for the narrow and full range TPS as opposed to an absolute number. FD FSM page F-172:

s6 narrow range TPS spec: .75-1.25 V closed, 4.8-5.0 V WOT

s6 full range TPS spec: .1-.7 V closed, 4.2-4.6 V WOT

I don't think it really matters that much though.

vrracing

iTrader: (1)

I think my narrow range is bad.

The SAFC and the Zeitronix are hooked up to the full range TPS 2G.

I think the narrow range is bad. When idling the narrow range (read thru the Zeitronix blue wire 5v input) sits at 2.27v. No amount of messing with the TPS screw changes it.

If I use the LED method to set it, I can get one light on but I can also turn the adjustment screw several rotations before it will go off again.

The kid is pulling the TPS off and we'll put the NA's sensors on to the Tii bracket.

HAILERS

Are you REAL sure your connecting to the right wires? 2F is green with red stripe. The 2G is black/green.

vrracing

iTrader: (1)

Yes, HAILERS, I am sure. I figured it out. If the car is On but not running, the value is 2.27v and it doesnt matter how the TPS is set. But if the car is running, then it reacts to the TPS adjustment.