after 2 weeks of almost not being able to drive the car at all due to bad idle problems and bucking and other stuff, I think I got it set.

car starts and idles great with lights on or off and accelerates good.

I set it too 1 volt I believe and it worked with the used tps I bought. I am so happy right now. hope the dang thing starts later after it is cold.

I didnt think I was ever going to get it running right.

thanks to all you guys for the help.

I do love a good running RX7

 

you used the multimeter test or the led test?

by 1 volt do you mean 1,000 ohms?

 

I used a multimeter. I dont remember now what it was. I had directions from 3 sources at once. I will double check it tommorrow. right now I dont remember. I do remember the range on the meter showed variation from 1 to 5 from open to closed throttle. does that make sense? I remember setting the tps to 1.00 whatever it was ...and then I tried to start it and it worked .

all my other problems were almost gone after that.

again, I dont remember right now. tired...

 

yup, you did it right. 1k ohms at closed throttle. 5k ohm at WOT. congratulations. The TPS is VERY frustrating sometimes.

 

belive it or not i have no tps.
it honestly runs better w/out one.. gone threw 3 tps's never ran right.
ripped it off one day and ran better than ever b4.
has a slight bog sometimes at 4k but verry rarely and it idles like **** most of the time.
but way better than b4. I would like to get it figured out still but only 1 rotory mechanic in my town and he is a bitch.

 

I think my TPS took a **** as well.. on my S4 TII the car doesn't wanna idle when cold, and doesn't wanna rev at all...

can I just unplug it?

 

i have a bunch of s4 tps's if you guys want to buy some

eric.

 

how much are u lookin for shipped to NY?

 

pm'ed you

 

yea i also have like 3 tps's
i'de like to get my car figured out but no one here to help me do it.
thats what you get for living in lincoln nebraska

 

I'm throwing my TPS and AFM away for good! I'm getting a MegaSquirt

 

for some reason when i use a multimeter and check the tps it starts at .91 then at full throttle it drops to .48 is my tps fried or just need adjusted?

 

If your talking .91 vdc at idle with a fully hot engine, and the voltage is dropping when you go to wide open throttle, then I'd suspect the tps is probably bad.

At idle it should be approx 1vdc. The .91vdc is close, but when you go full open throttle the voltage should be approx 4.5vdc or so.

Don't check/set the tps unless the car is fully hot or you lift up on the fast idle cam to make the cam come off the roll pin.

 

are you sure the multimeter is reading correctly?

 

i think so i road around and gave it a good beating shut key off and checked using 20 k ohm setting.ithink it was green and black wires does it matter which wires on meter go where on these two wires on tps

 

i also just pull the throttle cable on it for the wot checking

 

If checking the validity of the tps, using the resistance method described in the fsm, then yes, it makes a big difference. With the tps connector disengaged, and looking at the tps side of the connection.....hold the plug with the single blade at the twelve o'clock position and the two side by side blades at the six o'clock position. Put one lead of the meter on the top blade and the other meter lead on the bottom right blade.

With a fully hot engine at the idle position (engine not running), the reading should be approx 1K ohms. Now fully open the throttle and the reading should change to 5K ohms plus or minus 1K ohms.

A simpler way is to leave the tps connector connected and the Key to the ON position. Put the meters negative lead to the battery neg or another good ground spot. Push the Positive lead of the meter up the back of the green/red wire. The output of the tps should be approx 1vdc. If not, then adjust the tps screw til it reads 1 vdc. Done. Make sure the engine is fully warmed up as in HOT, before doing this setting. The throttle linkage and therefore the tps reading will change as the engine cools down. Therefore only set the tps if the engine is up to operating temperature.

There is a free download of the fsm availabe. See the fuel section.