Yea when i start my car in the morning the idle pulses from 900-2000rpm until it is up to temp, does this have anything to do with the tps adjustment, because i just adjusted them perfectly.

Sounds like a vac leak.

i believe its your accelereated warm up system. tap the throttle and your idle should stop bouncing

na its not the warm up cycle. ive tryed that, it pulses until the temperature gauge is in the middle.

i dont think the temp gauge should be at the middle, doesnt it go up to like 3/4? from my experience halfway its running hot

the middle of the temp gauge is the correct running temp for all cars, or at least all the cars ive been in, 3/4 of the way is running hot because it is higher than 1/2.

ON rx7's half for Fc's is hot. Normal is about 1/4 to 1/3.

well my temp gauge reads half way always when the car is warmed up-even when its below freezing out. it never moves from halfway, what can i do to get it to not be halfway?

S4 cars: normal operating temperature on stock gauge is about 1/4 to 1/3 from "C"



S5 cars: normal operating temperature on stock gauge is about 1/2 from "C"



you have an 89, so 1/2 way is perfectly normal.



i have seen this "surging" during warmup on my car also. i have noticed that an improperly calibrated TPS and vacuum leaks will worsen this effect.



however it is not an indication of any serious problem, so i wouldn't worry about it too much.



- Aaron

yea i kinda figured that, I ran the codes also and there was 17, which is feedback system and it said something about the o2 sesor so i replaced the o2 sensor for 17$, got out my tps tester light's and adjusted them and theres no more pulsing. Car runs a little smoother too, 17$ is nothing, i must of had the original on there.

[quote name='rx7man629' date='Jul 19 2005, 10:31 AM']yea i kinda figured that, I ran the codes also and there was 17, which is feedback system and it said something about the o2 sesor so i replaced the o2 sensor for 17$, got out my tps tester light's and adjusted them and theres no more pulsing. Car runs a little smoother too, 17$ is nothing, i must of had the original on there.


[/quote]



i'm going to have to look up the FSM again, because for some reason i recall the O2 sensor having one other function besides running in closed loop cruise mode.

it could have SOMETHING to do with the surging, which could explain it on my car since it has never been working on my car (adjust cruise using SAFCII).



also, remember that you should adjust the TPS after a good hard drive so it's nice and hot up to operating temperature. i notice the resistance on mine changes quite a bit between cold and hot.



- Aaron

yea i made sure my engine was good and hot, Also today being the first day of the new 02 sensor in i drove to work and back and the car still shutters and the same code came up- i definatly can tell the o2 sensor helped the prob but the code is still coming up and the car shutters slightly. Im stumped https://www.nopistons.com/forums/pub...1047683561.gif

so you are getting a # 17 "feedback" system code?

[quote name='rx7man629' date='Jul 19 2005, 12:02 AM']well my temp gauge reads half way always when the car is warmed up-even when its below freezing out. it never moves from halfway, what can i do to get it to not be halfway?


[/quote]



drive at high rpms for awhile, that will heat that sucker up

[quote name='coldfire' date='Jul 20 2005, 07:39 AM']so you are getting a # 17 "feedback" system code?


[/quote]

Yes i am still getting code 17 https://www.nopistons.com/forums/pub...1047683358.gif

[quote name='rx7man629' date='Jul 20 2005, 12:47 PM']Yes i am still getting code 17 https://www.nopistons.com/forums/pub...1047683358.gif


[/quote]



i'm not at home right now, but check the FSM if there is any troubleshooting on that code.



i know i get that code quite often, doesn't seem to affect that much though...