bugman1973

ive been looking for this thing every where cant find it. i know its on the site some where but where is it and the one in the archive has no pictures and it should. this has me really lost i dont know what to hook up where or what. can someone please help

bugman1973

does any one know where to find this or atleast the pics that go with the archive file? anyone?

John64

I just did the adjustment using two multi meters.

bugman1973

and how did you do that?

gsl-se addict

iTrader: (3)

The Haynes manual and the FSM both show how to set the TPS. You can either use a pair of lights (flashlight bulbs or LEDs) or you can use the multimeter method. The lightbuld rig is the easier of the two IMO.

bugman1973

well that what i was going to do but of the three prongs on the green test prong is positive and negative so i can hook up my leds and not have to re wire it.

gsl-se addict

iTrader: (3)

The two positive wires will go to the 'mouth' of the connector. One negative to each 'eye'. If you use the flaslight bulbs, then polarity does not matter.

bugman1973

yeah i guess i could do that i just have to find two bulbs. i have leds here already though

gsl-se addict

iTrader: (3)

The LEDs will be fine. I use a pair of the 12v LEDs from RadioShack when I adjust it

bugman1973

still cant get it to idle and still cant get the cooling system to not back flow into the overflow bottle. this car is really making me mad ive done nothing but take care of it and this is what she gives me.
when i get this thing running im going to run her hard just a little bit to make up for it and maybe ill have to put a new set of tires on it

bliffle

This problem is perplexing and persistent.

It seems as though we've covered all the basic fuel, ignition and cooling system problems.

That seems to leave only the possibility of combustion gases leaking into the cooling system. Usually that involves an engine rebuild if it is as serious as this suggests.

Does anyone have any better ideas?

Any good ideas to detect combustion gases in the coolant?

Any ideas of how exhaust gas might get into coolant in the external systems, i.e., exhaust leaks, etc?

rearviewmirror

Use a couple of voltmeters.... Takes just a minute or so to adjust the TPS. EDIT.. it's not a TPS, it's just a TS. There is no potentiometer measuring the position, it's a simple ON/OFF switch.

bugman1973

it runs and runs strong just wont idle when i can figure out that part ill do something about the cooling system i guess ill just go get another thermostat later.

gsl-se addict

iTrader: (3)

That is not true. The TPS is a potentiometer. When you set the TPS position, the ON/OFF characteristic is not due to the TPS itself. The TPS adjustment connector actually leads to the output of the ECU for the vent/vac solenoids for idle control (doesn't actually connect to the TPS). In otherwords, you are not directly looking at the output of the TPS. The TPS feeds into the ECU and then you are JUST looking at the output of the ECU and putting the vent/vac solenoids in the state that they should be in during idle when you adjust the TPS. The one light on that you are trying to get means that the vac solenoid is ON and the vent solenoid is OFF.

rearviewmirror

Thanks for the clarification. I was under the impression that since Mazda called it a Throttle Sensor (w/o Position) that it was doing nothing more than letting the ECU that some amount of throttle was applied and then whether or not to operate the alternate air systems. It makes sense that the ON/OFF condition is experienced with the green connector if it is on the back side of the ECU.