₦airaland Forum

Since the mechanic re-filled the A/C gas (assuming that he actually has), apparently the gas has leaked out again. Re-filling the system will not solve the problem, unless the point of leakage is identified, and rectified.
If it is actually not a leakage issue in the system, you have an electrical fault in the A/C circuit or a mechanical problem with some of the A/C components.
Honda Civic's from 2001 - 2006 are prone to faulty compressors / clutch magmets, leaking evaporators, malfunctioning expansion valve, condenser clogging caused by heavy debris due to design, faulty thermostats etc
You may give us a call below, as we have the leak detectors, manifold gauges and A/C recovery / recycling equipments, for accurate diagnosis. We diagnose, and repair A/C systems on Honda, Toyota, Kia, Mitsubishi, and Hyundai.

Best regards

HAMA ENTERPRISES (NIG.) LTD.
08026158430 & 08098045555
(ASE CERTIFIED)

1) Avoid hard acceleration
2) Gap or replace spark plugs as and when necessary at routine service intervals (3000 miles), or 5,000km
3) Keep air filter clean. Blow with compressed air or replace as necessary.
4) Clean or replace fuel filter (if necessary) at routine service intervals.
5) It is advisable to remove the fuel injectors, and run a volume / spray pattern, and flow bench test at least every 6 months. This is to be done on   a fuel injection cleaning machine. This will give an indication of fuel injector condition, and flow pattern to maxime fuel efficiency. If any abnormalites, the fuel injectors may be serviced in a ultrasonic bath, and re-tested.
6) On newer model vehicles, a fuel filter is not used, instead the fuel pump casing has a filter embedded, which should be removed, and serviced at least  a minimum of once every 6 months.
7) Try not to let the fuel level reduce below quarter tank, before re-filling. This will avoid any sediments accumulated by the fuel at the bottom of the tank to be drawn by the fuel pump / filter, and into the fuel line (fuel rail, injectors etc)
On older vehicles, ensure the ignition timing is set according to manufacturers specs.

You may contact us for fuel injector spray / volume, and flow bench tests etc., and other misc repairs on the following #:


HAMA ENTERPRISES (NIG.) LTD.
TEL: 08098045555 & 08026158430

We maintain, and repair Toyota, Honda, Kia, Hyundai, Mitsubishi, and some Nissan products.

Best regards

Hello! A busted / broken exhaust, we are assuming will be either of the following comoponents: exhaust manifold, intermediate 'A' pipe, catalytic converter. resonator, intermediate 'B' pipe, muffler, and any additional piping. These items generally rust due to age, water (road salt) etc. A hole or severe leakage (gasket), in any of these components will directly affect fuel economy.
The back pressure maintained at the engine is reduced; hence energy is sapped in pumping losses of, eg. a 4 stroke motor. The pumping loss is the negative / positive efficiency the engine is allowed to inhale air (intake), and exhale (exhaust) gasses, after the combustion process.
The faulty exhaust will create a negative backpressure on the exhaust side (ports) of the cylinder head, and the 4 stroke (cylinder) motor will automatically inhale (intake) more air to make up for the faster exit of the exhaust gasses.
Think of a four stroke (cylinder) engine as an air pump, intake ,and exhaust. Both sides have to maintained to create a steady (balanced) line pressure. Any restriction or leakage will upset the flow, and directly affect line (air) pressure.
The above is only a basic explanation on intake / exhaust. This is not what determines whether the engine is running lean (too much air), or rich (too much fuel).
All electronically controlled vehicles have an ELECTRONIC CONTROL MODULE / POWERTRIAN CONTROL MODULE, which work in conjunction with various sensors on the engine e.g. MAP (manifold absolute) pressure sensor, throttle body sensor, camshaft sensor etc.These sensors relay tiny voltages back and forth to the control modules to maintain proper ignition timing, efficient fuel curve etc.
The MAP (located on air intake) & oxygen sensor located in the exhaust manifold will determine the oxygen contect in the exhaust.
The negative back pressure created by the faulty exhaust will give a lean (too much air) reading back to the ELECTRONIC CONTROL MODULE. The ECM will then try and correct this by adding more fuel into the combustion chamber, by increasing fuel injectors duty cycle, in order to create maximum fuel efficiency.
Unfortunately, due to the busted / broken exhaust the high negative pumping loss is too excessive for the oxygen sensor (it cannot adjust), to give balanced readings to the ECM, the air is too much: hence the reading back to the ECU will be lean (too much air).
Since the ECM has no accurate reading it will increase the injector duty cycle, and dump more fuel into the engine, to keep it running, until the problem is fixed (THE LEAKING EXHAUST)!!!
THERE YOU HAVE IT, THIS IS HOW A FAULTY EXHAUST SYSTEM WILL AFFECT FUEL ECONOMY.
There are many other factors on racing / performance automobiles, and their less restrcitive exhaust systems, that despite being less restrictive, will actually slightly improve fuel economy, but that is another topic!!
Also, please note, that more exhaust oulets on a vehicle does not determine the most powerful naturally aspirated motors. This is a misconception, and is solely based on exhaust design, and structure.

Hope this was helpful!

Best regards