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Thread: Civic 99 Drinking Petrol like Sharbat

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    Thumbs up (FINALLY SOLVED) Civic 99 Drinking Petrol like Sharbat

    Salam PWs
    My civic is drinking petrol like hell. does only 300 kms per tank on highway & even less in city. The petrol needle can be felt going down while driving. there is no leakage & car moves great on petrol. no problem in driving.
    On CNG it does 200kms per 55cylinder. can u tell me how to increase petrol average. i have the advancer installed and it works. no problem on driving on CNG or PETROL. plz help

    ***EDIT***
    Problem Solved
    For all lazy people like me See Last Page


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    Quote Originally Posted by capsat View Post
    @Xulifiqar - I can assure you everyone now will stat messing with that Trimmer - such stuff may be advised in PM, so less of members get 'Excited'
    hmm - too much of something can be disastrous I think.
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    In Efi Cars .............everything Matters Alot.......!!
    Those Thermostat Valves Which are Putted B/w Coolant Passage Are for some Reason......Not For decoration......!!!
    I Know Myself How Much A Coolant Temp Sensor worth As I Wired It Up And Have Checked It......!!!
    So For Just And Looking For Magical Hidden Stuff......Keep Your eyes On Basic Stuff 1st and Thoroughly Check Each And Everything.........!!!

    When Efi Cars Starts Consuming Too Much Fuel As You Stated Like "Sharbat"
    Something Is Definitely messed Out.....!!
    TOYOTA Sprinter 86- AE80 DOHC 20v'D TOYOTA Corolla 98- AE101 4AFE 16v

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    kaash - yeh decoration item thermostat ka function hamari awam samjhe
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    if she is consiming it like sharbat thn will improve in winters :p
    d15b single vtec is usually equiped wth P08
    d15b dual vtec is usually equipped wth P2j

    unlike local Ds these JDM ds do require O2 do u hav one.
    DIY The Best Workshop on the Holy Planet!
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    Quote Originally Posted by Xulfiqar View Post
    kaash - yeh decoration item thermostat ka function hamari awam samjhe
    Ameen

    Got engine fully built of an city idsi since it got overheated several times.yet only 90k kms ppl never care abt such stuff but they do matter alot
    DIY The Best Workshop on the Holy Planet!
    Every thing changes,Its only the "change" which never changes.

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    Here Mechanics Care More About Opening And Closing Of Thermostat As Thermostat Didn't Do Itself

    They Always Think Its Gonna Fail And We Are Gonna Open It...So Lets Remove It Now....Kissa He Khatam kardo
    Na Rahega Bansss Na Bajege Bansrri
    TOYOTA Sprinter 86- AE80 DOHC 20v'D TOYOTA Corolla 98- AE101 4AFE 16v

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    Quote Originally Posted by SER_GTR View Post
    Here Mechanics Care More About Opening And Closing Of Thermostat As Thermostat Didn't Do Itself

    They Always Think Its Gonna Fail And We Are Gonna Open It...So Lets Remove It Now....Kissa He Khatam kardo
    Na Rahega Bansss Na Bajege Bansrri

    hmm - I wonder how they deal with the "pooping business" of a newborn child..
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    p2c is the d series ecu for the philippines market
    Honda Tuning Solutions
    03468152233

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    Quote Originally Posted by wasay_ahmed View Post
    if she is consiming it like sharbat thn will improve in winters :p
    d15b single vtec is usually equiped wth P08
    d15b dual vtec is usually equipped wth P2j

    unlike local Ds these JDM ds do require O2 do u hav one.
    The engine under discussion is D15B non-vtec. The car is EXI.

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    Quote Originally Posted by tayyabbaig View Post
    The engine under discussion is D15B non-vtec. The car is EXI.
    the car is not running stock engine but swaped jdm 1
    DIY The Best Workshop on the Holy Planet!
    Every thing changes,Its only the "change" which never changes.

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    @Xulfiqar
    Thnx bhai.
    1. I hav actually changed the injectors recently caz they were totally clogged & even refused to start the engine due to some bad fuel (the problem was there even before the previous injectors got clogged). new one r not actually new but works fine.
    2. Timing is dead OK on Petrol.
    3. No fuel leaks & engine compression checked & OK.
    4. Rocker adjustment is on factory recommended specs as opposed to general mechanic psychee.
    5. Is there a chance that the new injectors are of bigger capacity i.e. i hav heard that these models came with 190cc injectors & all new injectors are of 230cc. the injectors i bought are same brand & shape but couldnt find their capacity written anywhere. The shopkeepers didnt even know anything & laughed as if i m speaking greek. This may b a reason of more fuel injection.
    6. The other suspect is the FPR (fuel pressure regulator). i dont have any fuel pressure guage. but i know it is working OK.
    7. The Petrol tank was also cleaned & is shiny from inside, no rust etc. BTW the stupid mechanic couldnt open up the nuts of inline fuel filter. it was stuck too hard & due to multiple tries the wrench slipped & flattened out the sides of the nut. so it was left as it is & was not changed.
    8. CEL is working but i have all my doubts on that caz it doesnt goes ON by itself. it only works when i short out the 2pin DLC near ECU. i checked it & it gives error codes for sensors but not all. it doesnt know if TPS and MAP sensors r disconnected. it works fine on other sensors.
    Is it OK? how can i check its wiring (caz our intelligent mechanics r unfortunately not intelligent enough to check that)LOL
    ----Anybody with bright ideas is welcome to comment plz

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    And Yes my motor is D15B JDM non v-tec 5MT with s40 gear assembly. I like its smooth & humming sound. Its very quite but gives great acceleration & top speed. Ofcourse i m not into racing & talking abt the daily driving.

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    Here r the pics of my engine if any one wants to have a look.
    https://www.pakwheels.com/forums/per...swapped-engine

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    Quote Originally Posted by irfan44 View Post
    @Xulfiqar
    Thnx bhai.
    1. I hav actually changed the injectors recently caz they were totally clogged & even refused to start the engine due to some bad fuel (the problem was there even before the previous injectors got clogged). new one r not actually new but works fine.
    2. Timing is dead OK on Petrol.
    3. No fuel leaks & engine compression checked & OK.
    4. Rocker adjustment is on factory recommended specs as opposed to general mechanic psychee.
    5. Is there a chance that the new injectors are of bigger capacity i.e. i hav heard that these models came with 190cc injectors & all new injectors are of 230cc. the injectors i bought are same brand & shape but couldnt find their capacity written anywhere. The shopkeepers didnt even know anything & laughed as if i m speaking greek. This may b a reason of more fuel injection.
    6. The other suspect is the FPR (fuel pressure regulator). i dont have any fuel pressure guage. but i know it is working OK.
    7. The Petrol tank was also cleaned & is shiny from inside, no rust etc. BTW the stupid mechanic couldnt open up the nuts of inline fuel filter. it was stuck too hard & due to multiple tries the wrench slipped & flattened out the sides of the nut. so it was left as it is & was not changed.
    8. CEL is working but i have all my doubts on that caz it doesnt goes ON by itself. it only works when i short out the 2pin DLC near ECU. i checked it & it gives error codes for sensors but not all. it doesnt know if TPS and MAP sensors r disconnected. it works fine on other sensors.
    Is it OK? how can i check its wiring (caz our intelligent mechanics r unfortunately not intelligent enough to check that)LOL
    ----Anybody with bright ideas is welcome to comment plz
    the bit that you wrote that it does not see the TPS and MAP sensors disconnected is worrying, it should immediately set its check light when either is disconnected and the engine is running. ECU repaired by some genius before? Honda EFI wiring is quite simple, and if you peel back the looming you will see the wiring colours and damages if any, They usually are damaged from the TPS and map sensor outputs because CNG guys put their advancers right on these wires.

    For the injectors - check their part nos. which is stamped on them and compare to your old ones. - and check their resistance too.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    @irfan
    few months back u even didnt know if that engine is EFI
    seems like that problematic honda engine taught you alot during this time

    sometime back a pw'r also had fuel consumption issues with a swapped 4efe engine. the cars injectors were leaking
    Life is short and very unpredictable just like a Quarter mile .....

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    Quote Originally Posted by hash4u View Post
    @irfan
    few months back u even didnt know if that engine is EFI
    seems like that problematic honda engine taught you alot during this time

    sometime back a pw'r also had fuel consumption issues with a swapped 4efe engine. the cars injectors were leaking
    LOL. Yes that bugger (D15B) has taught me much. extensive research & fiddling has made me a mechanic. abt the injectors leaking, i think that cant be the issue, as i have installed a fuel pump cut off relay. its cuts off the power to fuel pump when on CNG. so no pressure=no leaking.

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    Quote Originally Posted by Xulfiqar View Post
    the bit that you wrote that it does not see the TPS and MAP sensors disconnected is worrying, it should immediately set its check light when either is disconnected and the engine is running. ECU repaired by some genius before? Honda EFI wiring is quite simple, and if you peel back the looming you will see the wiring colours and damages if any, They usually are damaged from the TPS and map sensor outputs because CNG guys put their advancers right on these wires.

    For the injectors - check their part nos. which is stamped on them and compare to your old ones. - and check their resistance too.
    i have checked the resistance of injectors as per the manual of the engine. they all r consistently similar. so the injector coils r ok & the visual inspection by hearing them clicking and removing connectors from injectors one by one also ok.
    Actually i wanted the ECU wiring diagrams to know abt the plugs wire colors & connections on ECU for troubleshooting the wiring issues but coudnt find the ECU on the net, even i couldnt find a similar ECU which has two plugs. so i m handicapped here on checking the wiring.
    Abt CEL not worried abt TPS & MAP, i came to know about this issue before installing the advancer. so no chance of advancer F****ing the wiring. Actually i have myself installed the advancer. checkout my thread below
    https://www.pakwheels.com/forums/cng...ancer-emulator
    CEL is actually not lightning up by itself. i have to check after every 2-3 days by shorting out the DLC if there r any errors. it tells me error codes by blinking but not without fiddling with DLC.
    whenever there is some error or i sense rough engine running, i short out the connector & it gives me error codes OK. but it doesnt light up without shorting the connector.
    Abt the MAP sensor, it has given me once code 3 which is MAP circuit problem (by above procedure) but it was intermittent & never appeared again after i cleaned the MAP sensor's connector.
    Can someone provide me P2C's rear pinout wiring diagram?

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    Quote Originally Posted by irfan44 View Post
    LOL. Yes that bugger (D15B) has taught me much. extensive research & fiddling has made me a mechanic. abt the injectors leaking, i think that cant be the issue, as i have installed a fuel pump cut off relay. its cuts off the power to fuel pump when on CNG. so no pressure=no leaking.
    the fuel line and injector rail remain pressurised for about 30 minutes after you shut off the fuel pump. The anti drain valve which is built into the pump takes care of this. Sometimes the fuel filter banjo bolts also have a check ball for this purpose.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    Quote Originally Posted by irfan44 View Post
    i have checked the resistance of injectors as per the manual of the engine. they all r consistently similar. so the injector coils r ok & the visual inspection by hearing them clicking and removing connectors from injectors one by one also ok.
    Actually i wanted the ECU wiring diagrams to know abt the plugs wire colors & connections on ECU for troubleshooting the wiring issues but coudnt find the ECU on the net, even i couldnt find a similar ECU which has two plugs. so i m handicapped here on checking the wiring.
    Abt CEL not worried abt TPS & MAP, i came to know about this issue before installing the advancer. so no chance of advancer F****ing the wiring. Actually i have myself installed the advancer. checkout my thread below
    https://www.pakwheels.com/forums/cng...ancer-emulator
    CEL is actually not lightning up by itself. i have to check after every 2-3 days by shorting out the DLC if there r any errors. it tells me error codes by blinking but not without fiddling with DLC.
    whenever there is some error or i sense rough engine running, i short out the connector & it gives me error codes OK. but it doesnt light up without shorting the connector.
    Abt the MAP sensor, it has given me once code 3 which is MAP circuit problem (by above procedure) but it was intermittent & never appeared again after i cleaned the MAP sensor's connector.
    Can someone provide me P2C's rear pinout wiring diagram?
    If the CEL is not functioning as a warning light then I believe the ECU is bad. You would be better off installing another similar ECU or something to match your engine, you may have to change the wiring too as you are a 2 plug system.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    After some search i found a workshop with an EGA machine here. The mechanic told me that petrol mixture adjustment cant be done with EGA, only CNG. So he connected his laptop with diagnostic software & read out any codes but there were none. The readings from ecu (at idle) were as under
    1. Idle Mixture Adjustment - 2.5 v
    2. Fuel Injectors - 3.2 ms
    3. TPS - 0
    4. RPM - 750+-
    Rest i dont remember.
    Then he adjusted the IDLE MIXTURE ADJUSTMENT with the trim pot screw with a screw driver & the new reading was as under
    1. Idle Mixture Adjustment - 2.1 v
    2. Fuel Injectors - 2.98 ms
    3. TPS - 0
    4. RPM - 750 +-
    He told me to have a test run for a few days. will post improvements if any soon
    @Xulfiqar
    Please comment on the above & by the way he told me that my ECU P2C is an OBD2 ECU but only has a 3pin DLC instead of 16pin as he connected the OBD2 diagnostic software by using a 16pin to 3pin converter plug.

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