problem with TPS sensor

[fixkick]

both are covered in the manual, FSM. (factory service manual, and on my Duty cycle page)

 the dash pot is set hot engine at 2500 RPM that screw. on the DP is set buy forcing the DP to go active, on hot running engine.

the TB base TV screw is for setting ISC duty cycle only !
the ECU is hard coded for hot 800rpm and can not be changed, only the duty cycle can be set to 50% (no idle up commands active, like AC off, head lamps off, and blower off and defrost off)

I can't find the FSM service manual so I can look at the screws, you can show me where, a friend greeting, thank you

1980/90 G16 right?  1.6liter engine RIGHT>?

no lie, finding 31 year old manuals are not easy, (ebay has them if you keep and set a watch searched there, waiting...)
but this site here new shows it. (not tried by me but here it is)
https://www.genuinesuzukimanuals.com/car...rtn=2|25|3





the web site has 80/90 facts, here are some links to those 2 very unique year cars.

spark:

https://fixkick.com/no-spark#89

http://www.fixkick.com/IGN_timing/89-timing.html

tps calibration is after you do Dutycycle first ( at TV stop screw) (TV = throttle valve)

https://fixkick.com/tps-testing#1989-90-only-calib.

duty cycle is set with the TV stop screw. (
this can be done with a volt meter on DC volts across the 2 ISC wire pins, set to 7vdc running, (1/2 alternator output is 14/2=7v)
this is if you do not own a DUTY cycle meter, this above method.



the Duty cycle page is here.(not done like 1991 to 98 at all) UNIQUE ! 91+ manuals are useless HERE.

https://fixkick.com/IDLE-AIR/89-90-idle-air.html


and last after TPS calibration is Dash pot screw adjustments at the DashPOT screw shaft.



TPS calibration.

https://fixkick.com/tps-testing#1989-90-only-calib.


DP calibration. methods. (always last)
Hot engine, 82C.
activate the Dash pot with hand vacuum tool vacuum nipple to the tool  (the never touch screw TV only applies to 91 and newer G16 TBI engines)
on this car there is no idle air bleed screw so must be adjusted (all things relate) form the 1989/90 books not newer cars. oK?


https://fixkick.com/IDLE-AIR/Dash-pot.html#calibration

---------------------------------------------------------recap--------------------------------

1. spark timing must be right first (it effects RPM) SO IS FIRST.
   
2. hot engine not cold.
   
   
3. set Duty cycle first.  this makes 800 rpm regulation work right.
   
   
4. then TPS Calibration next, as the above step changes this on 89/90 only cars. 91 the bleed screw made all this more easy.
   
   
5. last set Dash pot adjustment.
   

working on any car and no manual is super hard work. why work blind?  89/90 car is not like 91 up. sorry not. nor the G13 is carburetor car here USA.
in 1991 the TBI throttle body changed radically as did the new ECU and matching new electronic advancing distributor, totally unlike any 89/90.


the dash pot only seen on 8valve TBI engine is short duration, 15 to 30 seconds cold start fast idle device, a vacuum servo motor it is.
and is covered how to set it in all FSM 89 to 95 , 8valve engines (unchanged this one part device. 16valve has no such DP device. nor does  the G13 USA 89 carb engine)