TPS Calibration (With Pics) for Honda Lovers

[SER_GTR]

Nice Efforts But As Xulfi Bhai Said...One Thing Has To Be Locked And Other Adjusted As Per Required....One Simply Don't Need To File It Till Its Beaten Badly..It Remain Adjustable In Range....!!

Volt-Meter 0 Throttle And WOT Readings Should Be Within Range..!

[irfan44]

i admit. The filing part is the extreme. I think its for Jugaari people or for people who have used parts from a different machine & needs to adjust it as per oem specs.

Anyways, the 1st part is absolutely OK & shows the correct procedure of calibrating a Honda TPS.
& i totaly agree that atleast 1 thing should be locked. But wat if our Ustaad has already shown his ustaadi & now he orders u to buy a new TB alongwith untouched sensors?
So atleast this would bring the messed up TB near to oem specs if not exact as already said by Xulfiqar.

[irfan44]

In most cases the Throttle Stop Screw is messed up by mechs, as they use it to increase rpm on cng. It affects the upper & lower volt readings as a whole e.g it moves from standard 0.48-4.5v to 0.53-5.0v.
So 1st we need to attach the multimeter & start unscrewing the TS Screw & both upper & lower ranges to 0.48-4.5v. DONE

2nd Scenario.
U buy a car & someone has already fiddled with both Tps & TS Screw independently, WORST Case ur throttle plate is bent as well.
OR u buy a TB from Kabaar & find both settings out.
So there comes the 2nd part of DIY as a rescue.

& again FILING it is extreme, caz innovations & improvisations hav no limits:)

[shqasmi]

@irfan44: great thread! this is the thing our so called mechnics dont even know. one thing i want to ask you, can i apply this procedure on my City ExiS 2001 auto? I am a DIY lover and love to do things on my own, rather than visiting mechanics and spending money and in the end you find out that the car has been messed up! great thread mate keep up the great work

[irfan44]

@Shqasmi
Yes u can do it.

[xsxd]

Our Ustaads have knowledge which their Ustaad gav them. They r not ready to accept anything new.
They apply standard settings to all engines, starting from so called tappets to tps etc
They deal A,B,C Honda as just Honda. they r not concerned wat motor is lying under the hood.
The Baseline they use is that if a 14 inch tyre can fit any model then all settings can apply on all engines.

you vouched for Asad at Tweakshop... that still true?

[jz]

great thread,v v informative (Y)

[xsxd]

i dont normally mess with my car, but i m starting to believe that i should start. tired of all these 'expert' tuners screwing up my car

[imtishal]

Pics not visible..

[shqasmi]

pics are also not visible to me except the one which is showing a yellow multimeter

[irfan44]

Pics not visible..

pics are also not visible to me except the one which is showing a yellow multimeter

Can anyone else confirm that. caz yesterday i spent 30 mins uploading bigger pics as ToxicDevil couldn't read them.
btw i can view all at my home PC, my office PC and my iphone. first 2 use Firefox & iphone use Safari.

Even then if u cant see pics, i'll try to upload again.
btw there r 40 pics in the post.

[xsxd]

pics visible! never stopped being visible.

[irfan44]

Sorry for inconvenience abt pics not showing. i m fixing it.

[irfan44]

i've fixed the pics

[immad100]

seeing a level diy after a long time,great effort,post vids of idle rpm on gasoline and cng if you can.

[irfan44]

After discussions here with Xulfiqar & others, i did something insane today to my civic.
I wanted to recreate the scenario of a CNG mech fiddling with Throttle Stop Screw to increase rpm & de-calibrating the TPS by moving it.
Here it goes:

May car specs b4 fiddling
- Idle fine. 850 on Petrol & CNG both
- Turning on AC increases rpm by 100 on both Petrol & CNG
- Little jerk felt on every gear change

The Insane Experiment
- I screwed in the TS screw to increase rpm as mech do by giving it few turns
- Loosened the TPS bolts & moved it to & fro, so i dont know how much it moved
- did the same to Idle adjust screw
(i made a big mess of my ride lets see if i can recover it)

The Voltage Readings from TPS
- WOT = 4.63v
- CT = 0.59v

The Come Back
- Unscrewed the TS screw but it could not move readings below 0.54v (previous 0.59v) as Throttle closed fully at 0.54v
- Locked the TS screw at 0.55v
- Checked WOT, It was 4.63v. so moved TPS & brought it down to 4.5v exact & locked the TPS.
- Checked CT, it was 0.43v. so tightened the TS screw again till it got to 0.48v exact & locked it
- Now everything is in order (or i thought so :)) CT=0.48v, WOT 4.5v
- Did an ECU reset & started the engine
- It started wobbling (later found a loose injector holder)
- with injector problem fixed, started the car again, the idle started surging from 1100-1800 repeatedly
- After abt a minute the idle settled at abt 1200 & stayed there refusing to come down

• Did i miss something? YES the Idle Adjust Screw
• Adjusted the idle with Idle Adjust Screw to 900
• Reset the ECU again
• It started at 1600 & i let it idle for 5 mins
• Eventually it came down to 850 & stayed there WOW
• Checked with AC on, increased to 950 WOW
  
  The Results
• RPM back to stable 850 on both Petrol & CNG
• No problems with AC on
• WOT 4.5v & cT 0.48v
• Jerk on gear change vanished

So it is proved that u can safely rescue ur TB & TPS without buying a new TB if ur Ustaad screwed it up
THUMBS UP

[ToxicDevil]

I am going to do this tomorrow. If I mess up it will be your fault.

[irfan44]

Recommended sequence 4 all who dare do it

1. switch on ignition
2. note down CT & WOT readings. if within 0.01v then plz dont fiddle STOP
3. if WOT 4.5v then just adjust TS screw & make CT 0.48v
4. if CT is above 0.48v & TS screw is fully out then follow my post 35 above
5. dont just unscrew ur TS screw all the way. the throttle plate might get stuck.

[xsxd]

man i have to get myself a multimeter... but i m still stuck with iacv and CEL codes

just "blew" an ecu today.... apparently "its cover was left loose and dust got inside and messed up the iacv circuit" ... put in a new ecu that is supposed to cost 8000 and the check light still comes on when the car reaches 100km.... UGH!!

[coolsmart]

nice guide, keep it up
I once messed with my TPS sensor with intention of cleaning and panga. After cleaning and installing it back, the idle rpm were above 1000(cant remember exactly). Quite sad wht i did , I dismantled and installed it again but with same result. I rushed to my local mechanic but came to come they are off on friday.
Went home and this time i installed the TPS with ignition on and finally the rpm got normal. us kay bad toba kar le, kyun kay baron ka kehana hay
"chalti cheez ko hat nahi lagana".
for Honda city 04---07 the manual says following calibration.
With ignition switch ON (II) and throttle fully open: 4.9 V
With ignition switch ON (II) and throttle fully closed: 0.1 V