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Thread: Civic 2005 Exi Prosmatic lost its pick and boost

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    Default Civic 2005 Exi Prosmatic lost its pick and boost

    Hi there, i live in Lahore and few months ago purchased civic exi 2005 prosmatic engine swapped from d15y to d15b.... it had some transmission work required so i got it changed from bilal gunj....
    Now the problem is that it seems like that the car is pulling another car behind it...it takes 30 secs to reach 100....on cng its max speed is 120 and on petrol at the most 140....
    The car does not show any error codes on computer check at honda and at local mechanics....it also produces and engine knock while on petrol...no knock on cng.... and on high octane it stops...
    I have tried different octane boosters and other things but it all went vain... engine timing is fine too.....

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    Get Knock sensor and the AFM checked. Check if a "CNG tuner" has blocked the intake.
    Death is not the greatest loss in life. The greatest loss is what dies inside us while we live.

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    All the sensors are fine..... the car does not give any code or engine check light

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    Quote Originally Posted by zainshahryar View Post
    Hi there, i live in Lahore and few months ago purchased civic exi 2005 prosmatic engine swapped from d15y to d15b.... it had some transmission work required so i got it changed from bilal gunj....
    Now the problem is that it seems like that the car is pulling another car behind it...it takes 30 secs to reach 100....on cng its max speed is 120 and on petrol at the most 140....
    The car does not show any error codes on computer check at honda and at local mechanics....it also produces and engine knock while on petrol...no knock on cng.... and on high octane it stops...
    I have tried different octane boosters and other things but it all went vain... engine timing is fine too.....
    Brother have u done the engine compression test ?

    Is transmission shifting on proper RPMs ?
    All life is an experiment. The more experiments you make the better.

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    Yes the gear are shifting properly....i took the car at honda service center they say all is fine....

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    Quote Originally Posted by zainshahryar View Post
    Yes the gear are shifting properly....i took the car at honda service center they say all is fine....
    Check the spark coils.

    Engine is loosing compression.
    All life is an experiment. The more experiments you make the better.

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    AOA

    sir does 2005 has catalytic converter if yes than its choked get is services from honda

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    If the catalytic converter is clogged then the car would give an O2 sensor error.....

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    I've already checked the engine coils, they're all fine and healthy......

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    Check for the exuast system plus check for fuel pump. Same was the case for my car, i had to change its two sensors, Map and Rpm i think, i checked for entire exuast system plus the fuel pump, the culprit was the fuel pump.
    Got the total bill of Rs. 7000. Tuning + Fuel Pump + 2 Sensors (RPM sensor, MAP sensor)

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    I already got the Fuel pump checked and it is fine and so are the other sensors but can't say about the exhaust system....but it seems to be fine as the thrust at the end looks really normal just like my other rides.....

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    i hope u changed the ecu when upgrading to vtec assembly
    Life is short and very unpredictable just like a Quarter mile .....

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    The engine was already swapped when i bought this car so can't say any thing about that.... but what i know is D15y and D15b are the same engine just assembled in different countries....

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    make sure the check engine light is not rigged
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    Yaar engine check light is not the fault either.....

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    then best do a full inspection, start by checking fuel pressure properly and not with finger over the fuel line, use a pressure gauge. Do a compression test, check valve clearances and adjust as required.

    If you say the ECU is free of error codes and you have lost power then even in the service manual it is mentioned to physically check these also. Sometimes an intermittent crank sensor or TDC sensor also causes this.
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    Quote Originally Posted by zainshahryar View Post
    If the catalytic converter is clogged then the car would give an O2 sensor error.....
    sir it does not until or unless it is completely gone i was facing the same issue with my Civic went to honda they opened up the converter and it was blocked so he serviced it and the problem was gone

    i was having no errors yes but the car was sluggish
    rest choice is urs

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    There are many reasons which relate to your problem. Please confirm the following data with the tool described below:
    1. Spark plug gap 0.9 mm.
    2. Check Valve tappet clearance with feeler gauge at operating temperature 0.25 mm (both intake and exhaust).
    3. Fuel pump pressure with pressure gauge 38 psi to 44 psi.
    If you have already done all as above, then may be your valve timing is at fault. Moreover if you have replaced the timing belt make sure that the timing marks match as per Honda specification chart. Before doing such a laborious task get the ignition timing be checked with the help of a scan tool or computerized diagnostic equipment. The ignition timing should be 5 degrees BTDC (Before Top Dead Centre) to 7 degrees BTDC at idle speed with all the accessories switched off. If it is not as specified, recheck the timing belt alignment marks.
    Regards

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    Quote Originally Posted by shadab_lodhi View Post
    There are many reasons which relate to your problem. Please confirm the following data with the tool described below:
    1. Spark plug gap 0.9 mm.
    2. Check Valve tappet clearance with feeler gauge at operating temperature 0.25 mm (both intake and exhaust).
    3. Fuel pump pressure with pressure gauge 38 psi to 44 psi.
    If you have already done all as above, then may be your valve timing is at fault. Moreover if you have replaced the timing belt make sure that the timing marks match as per Honda specification chart. Before doing such a laborious task get the ignition timing be checked with the help of a scan tool or computerized diagnostic equipment. The ignition timing should be 5 degrees BTDC (Before Top Dead Centre) to 7 degrees BTDC at idle speed with all the accessories switched off. If it is not as specified, recheck the timing belt alignment marks.
    Regards
    Intake and exhaust valve lash gap is not same, please refer to the service manual.
    As far as I remember, the timing is 8 degrees before TDC with 1 or 2 deg tolerance.

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    Thank you for your kind advice. To my knowledge, the valve tappet clearance is concerned with the ambient temperature, engine temperature and the fuel to be used. Lower the ambient temperature more the clearance will be. Next, mostly the people here would hardly find the feeler gauge of 0.18mm or 0.23mm. I know the clearance is Intake (0.18mm-0.22mm cold) and exhuast is (0.22mm-0.27 cold). So the difference is only 0.02mm which will not harm the engine performance at all. Here the debate is not what the exact ign timing should be, but it is merely to check if the timing belt is dislocated or not. The ignition timing varies a bit at idle speed. It is 7 degrees +- 2 degrees which is exactly in the range which you have stated. If one tooth of timing belt is wrongly aligned with the index mark it will read the ign timing either 0 degree or 16 to 18 degrees BTDC.
    Once again I thank you for your valuable input and support.

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