Honda Civic Fk7 0-100

[Aleck Cobbs]

Ihave honda civic rebirth 2013 vti oriel prosmatic. Every thing is in perfect condition. I have replaced the spark plugs, new coils. changed fuel filter and fuel pump. clean the injectors. Engine is in perfect condition. Its mileage is 1 lack and I am using 5w 30 oil. catalytic has been removed by previous owner and its has plates instead of grill. It zero to 100 time is 13 to 13.5 seconds. I don't know why it is taking that much time. Need your suggestion to reduce that time.

can it be due to no catalytic converter? I have search a lot on internet and people are saying that without catalytic converter car acceleration is much better.

It is prosmatic. i tried with both manual shifting i.e. D1, D2 (shift the gear before it touch the red line) and also by simply set D3 gear but in both cases the results are same and it can not achieve 100 km/h speed before 13 seconds.

Spark plugs , throttle , catalytic and fuel filter, valve clearence, if one or more of these are bad that results in poor performance. If none of these are serviced get them all done its usually a 4-5k service from a decent tuning facility.

Most likely the removal of the cat is the culprit. Do you have a check engine light? I remember reading up a similar article 2 years ago on this forum about a person that had a similar problem, and someone replied that when you remove the cat you're supposed to make modifications to turn off the check engine light. Basically, when you remove the cat without making this modification, your engine runs in a kind of "safe mode" all the time where it thinks that the quality of the fuel is terrible. Therefore, to try to prevent this bad fuel from harming it, it goes into a state where the performance decreases and the car consumes more fuel.

In your particular case, There is a chance that plates installed by previous owner is restricting air flow but you should see a limit to RPM rather than increased time to achieve a top speed. Usual symptoms to what we experience with choked Cat converter but it doesn't seem to be the case here. So i don't think it has anything to do with Cat or plates.

Besides, a standard civic figure for 0-100 is 10 seconds, yours is just off by 3-3.5 seconds. I won't worry much about it.

Pre-Cat O2 sensor is used for air-fuel mixture calibration to achieve the stoichiometric ratio, If the ECU/PCM does not see any signal from the Pre-Cat O2 sensor, it'll revert back to Pre-Mapped values in the ECU and issue a CEL. Most of the vehicles drive fine with CEL but some manufacturers push the car into limp mode so that the customer panics and gets it fixed on priority.

ECU will not limit the fuel to injectors unless it has enough evidence to conclude that the car is running rich.

Post-Cat O2 sensor is just there to monitor the health of Catalytic converter. ECU/PCM does not use it's signal for any performance tuning.

His car is not in Limp Mode. In limp mode either the Engine RPM is kept under 2000RPM or car has only one gear available (usually 3rd ); Implementation of Limp Mode is different across manufacturers.

Some manufacturers don't even choose to implement it.

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