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Thread: Check light on after throttle body servicing: City 2007

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    Default Check light on after throttle body servicing: City 2007

    CHECK LIGHT ON AFTER THROTTLE BODY SERVICING: HONDA CITY 2007

    Wanted to confirm something, yesterday I have performed the servicing of Throttle Body of Honda City 2007 by my own self. Everything was done successfully but later I noticed the increase in RPM on petrol and CNG to 1500 RPM. That may be probably because of cleaning and adjustment of CNG & Petrol with settings with dirty throttle body.


    Now engine check light of oxygen sensor turned on within 3 seconds of vehicle is made to run on Petrol where as this light remains off on CNG.
    I am bit confused as I remember that this same light used to operate on CNG once in past which had something to do with Advancer and Emulator but right now its fine on CNG but turn its self on Petrol. I have verified the connections and everything seems to be fine.


    Any wild guess what may be causing this.


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    No need to worry... it happens.

    i think one must do tunning along with TB cleaning.. just my personal experience

    OK for the problem..
    after driving, just disconnect your -ve battery terminal for abt 5 minutes and recconnect after that for ECU reset.

    if problem doesnt go away then do the computerized tunning on petrol and gas along with airfilter change/ cleaning.
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    As per my assumption i think that if u cleaned throttle body by your self at home.if u open the MAP and TB sensor then it is impossible to get the car back on its old settings.And if u havent opened it then it might be a short somewhere in the clamps of the MAP,IACV,MAF sensors of ur vehicle.You should open the clamps of the Throttle Body sensors and wipe the grim or petrol off from there then check and tell us.
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    Thanks for your reply, I will try the option which you have highlighted. I have already tried this by taking off the battery terminals but it did not seemed to work. I will try it once more and will give 5 minutes interval in between then will try to get it computer checked.



    @Car_bus2008
    It can be a possibility as I have removed all the sensors and then cleaned the main throttle. Thing which bothers me that I have to perform this operation thrice as first time once I installed the throttle body back, RPM went very high 3000 and was not coming back so I had to redo the entire procedure. Second time I again failed to control the RPM and ask for a technicians help and third time it back stable on 1000. Might be, some of the electronic sensor may be short with petrol but it should recover quickly as we know petrol evaporates very quickly.

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    bhai sabah this is to be set with proper diagnostic tool, you cannot set it your self. now visit the dealership and get the idle setting set.
    RIP

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    i hope you have not screwed TPS or oxygen or theres a third kind of sensor too.
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    By the way I ve tried servicing the TB cleaning of Platz 2001. I did it by disconnecting the terminals. then all electric connectors and sensors one by one. except for last one sensor cuz i noticed that it was connected to a body thru which engine coolant circulates. so i put everythng back n didnt clean it.

    I want to know from where should i disconnect that coolant thngee. from the points the two tubes are connected to main coolant lines or by opening the screws on the throttle body.
    -

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    as for the prob of the poster, my bro in law had exactly the same problem with his chevrolet joy. n it was resolved only when computer was connected to the ODB port n the 3s mechanic did his thing.
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    i think the TPS sensor assumes that a different position is the idling position and stores that position into some kind of memory. n the problem can be resolved by resetting its memory value.
    did u performed the cleaning by disconnecting the battery first???
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line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]--> I did one thing after cleaning Throttle body, sensor were laying separate and once throttle body was cleaned properly, I took a brush and after dipping it in Petrol, I have tried to clean exterior of sensors with it. Maybe some petrol might would have made its way inside the electronics of the sensor.

  11. #11
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    just 2 cents from my side

    I can not find the words how to explain it to you but there is an adjustment screw by which you can adjust the idle rpms. I myself had the same problem when few mechanics ruined the idle rpms by fiddling with the same screw. The used to tighten it and it used to increase the idle rpms. Actually its a juggar by which our mechanics increase its idle rpms. When your car was running all the sensors had adjusted them with the position of the screw now that they are clean you can loosen the screw. I would try and arrange a pic for reference Check light on after throttle body servicing City 2007 -395655

    Actually when press the accelerator and the cable is pulled there is silver coloured circular wheel sort of thing to which the extremer end of cable of is attached. When you press the accelerator the wheel turns in clockwise direction and when one releases the accelarator the wheel moves back in anticlockwise direction. Now there it is the screw to reduce the backward anticlockwise movement of the wheel sort of thing now when you unscrew it it will reduce idle rpms. For unscrewing the screw first you have loosen the nut that holds the screw in place. Its the same setting as is used in mehrans kit for peak adjustment.

    I hope you got it

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    Dear hav u changed the gaskit of throttle body before putting it back on. If u did not fiddle with the sensor settings or idle stop screw then the increase in the rpm indicates a vacuum leak. change the gaskit & make sure u tighten it good (w/o breaking the bolts). if problem persist then do a diagnostic check & find out which exact sensor is reporting the malfunctioning.

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    Hello to all,

    i've read that topic but i m still confused some says should use only honda oil bough from honda dealer. some says havoline or Zic should be fine.

    expert opinion required for my honda city manual 2007,

    also i have just tuned up my car , like throttle body clean tappet setting new NGK iridium plug installed. there has been positive changing while driving but still some thing missing, what should i do or check to ensure everything working accordingly.

    Note = my city manuel 2007 driven on petrol odo shows 136000 km done,

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    Talha. Nice to see that you work and it was your Diy work I really appreciate it. For the Procedure as you are well known and I know you had done the things properly. But 2 aspects from my side plz do recheck the Idle valve readjustment the one which is below the TB and clean it thoroughly by removing its 4 screws and the magnetic pulser as well when you r done with that cleaning just refit it back and adjust the idle rpms from that idle air valve. Remember the TPS clearance screw must not interfere or add any tps or TB blade clearance AkA it should not be raced up from that screw. Your idle problem would be solved and for the check engine light. As you describe on obd it shows O2. Check for the heater circuit of the O2 by Multimeter or the test lamp procedure one thing more by the help of obd scan tool just check the o2 voltage reference. Is there any movement in that voltage if yes then go for the heater circuit if no then change the o2 but first confirm the heatet circuit +tive probe. Most of the time in these (chowa) shape honda's had blown +tive wire to the o2.

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    Quote Originally Posted by talhawaleed View Post
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line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]--> I did one thing after cleaning Throttle body, sensor were laying separate and once throttle body was cleaned properly, I took a brush and after dipping it in Petrol, I have tried to clean exterior of sensors with it. Maybe some petrol might would have made its way inside the electronics of the sensor.
    - sensors are delicate carbon heads and should not be cleaned with contact, a carb spray is enough
    - some sensors (like tps) have initial position or the last position which is stored in ecu .. when u remove the sensors and do not initialize the ecu gets error.
    "You have not lived today until you have done something for someone who can never repay you."

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    RPM Raise can be defined by non functional IACV or Introduction of space between throttle butterfly and body causing vacuum leak. If you say you are having check engine light you may have got issues with IACV. Secondly if you have verified a code for O2 after inspecting your error codes then some CNG guys also bypass the O2 sensor from modules you need to make sure that wiring is intact and connectons are worky else o2 can be suspect. But even if o2 dies RPM cant be raised.

    Solution: Start the car. Take carb cleaner and spray near the throttle body to see if there is a vacuumm leak. If engine speed changes then you found a leak. Dont adjust throttle screw for rpm adjustments if you want to have peaceful life
    93 Accord CB7 (Sold) / 2005 CL7

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    Quote Originally Posted by waqar613 View Post
    Hello to all,

    i've read that topic but i m still confused some says should use only honda oil bough from honda dealer. some says havoline or Zic should be fine.

    expert opinion required for my honda city manual 2007,

    also i have just tuned up my car , like throttle body clean tappet setting new NGK iridium plug installed. there has been positive changing while driving but still some thing missing, what should i do or check to ensure everything working accordingly.

    Note = my city manuel 2007 driven on petrol odo shows 136000 km done,

    I think, its injector cleaning, whenever someone removes the intake manifold for tappet settings which we have to do on this vehicle then kindly ask him to clean injectors as well by taking it out. At that time, its very easy and hardly 10 minutes of additional job. I got those cleaned on 120k, they were dam dirty and clogged, the mileage immediately improved from 9km/L to 15km/L.

    Plus, if you ever think of servicing it then consider replacing fuel filter as well, otherwise is going to be clogged much earlier like within 5k to 10k.

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    Quote Originally Posted by Naweed View Post
    - sensors are delicate carbon heads and should not be cleaned with contact, a carb spray is enough
    - some sensors (like tps) have initial position or the last position which is stored in ecu .. when u remove the sensors and do not initialize the ecu gets error.
    agreed.

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    Quote Originally Posted by waqar613 View Post
    Hello to all,

    i've read that topic but i m still confused some says should use only honda oil bough from honda dealer. some says havoline or Zic should be fine.

    expert opinion required for my honda city manual 2007,

    also i have just tuned up my car , like throttle body clean tappet setting new NGK iridium plug installed. there has been positive changing while driving but still some thing missing, what should i do or check to ensure everything working accordingly.

    Note = my city manuel 2007 driven on petrol odo shows 136000 km done,


    As far as engine oil is concerned, i think this vehicle runs far better on 5w-30, 0w-30 as compared to thicker oils, may it be whatever brand.

    now as far as gear oil is concerned, use Honda genuine gear oil, the basic reason behind this is that gear oils used in other vehicles and one available in market have a completely different specification and viscosities whereas the one recommended for this vehicle has a completely different viscosity and only sold by Honda.

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    Quote Originally Posted by a_n_memon88 View Post
    just 2 cents from my side

    I can not find the words how to explain it to you but there is an adjustment screw by which you can adjust the idle rpms. I myself had the same problem when few mechanics ruined the idle rpms by fiddling with the same screw. The used to tighten it and it used to increase the idle rpms. Actually its a juggar by which our mechanics increase its idle rpms. When your car was running all the sensors had adjusted them with the position of the screw now that they are clean you can loosen the screw. I would try and arrange a pic for reference Check light on after throttle body servicing City 2007 -395655

    Actually when press the accelerator and the cable is pulled there is silver coloured circular wheel sort of thing to which the extremer end of cable of is attached. When you press the accelerator the wheel turns in clockwise direction and when one releases the accelarator the wheel moves back in anticlockwise direction. Now there it is the screw to reduce the backward anticlockwise movement of the wheel sort of thing now when you unscrew it it will reduce idle rpms. For unscrewing the screw first you have loosen the nut that holds the screw in place. Its the same setting as is used in mehrans kit for peak adjustment.

    I hope you got it
    Very old message but let me reply that as well, I now completely understand what you are talking about. Engine RPM can be controlled either by throttle position sensor or by a screw which rests on throttle body. Problem for those who run this vehicle on CNG is that at times, you can adjust it either for petrol or either for CNG. Once adjusted for CNG then vehicle may run on higher rpm once driven on petrol and once adjusted on petrol then rpm may completely drop on cng. This area is one of the most tricky for vehicle which runs on duel fuel as only solution to this is have a good quality venture installed on this vehicle otherwise we may always be struggling with idle rpm screw on cng kit. Sorry, I have learnt a lot in past few years since I posted this thread.

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