pak:
I have a car with a 3.0L engine. though the fuel consumption has always been on the high side,

however of recent, the fuel consumption has shot to the roof.


It now guzzles fuel like no man's business.

I've had to service the car, the mechanic requested that the spark plugs be changed, which I did.

But the situation hasn't improved considerably.

Now the mech is suggesting I change/service the fuel injector and the exhaust.


Please, I wish i can get expert advice on this cos am quite scared of this trial and error method from Nigerian Mechs.


What do you think caused this and what are the suggestion as regards resolving the problem.

By the way, the car is a Honda Accord EOD 2003 model

gly2ken: seina, my car refuse to start whenever the engine is hot. after driving it for sometime, if i pack it and want to start it immediately the temperature guage will b high and the car will refuse to start until the temperature goes down. the car is toyota rav 4, 2004 model.

gly2ken: seina, my car refuse to start whenever the engine is hot. after driving it for sometime, if i pack it and want to start it immediately the temperature guage will b high and the car will refuse to start until the temperature goes down. the car is toyota rav 4, 2004 model.

NUkachukwu: Hi guys, I have a SAAB 95{Eco power, direct ignition}, when ever the AC is turned on, it drags the engine hence the car struggles to move and it consumes a lot of fuel even without the AC turned on. Can anyone kindly advice because I so love that car and do not want it to park up? Thanks.....

realflakes: I have d same problem wt my siena 2002 model it consumes fuel like mad. I just got it 7months ago dey asked me to change d plugs n many others things which I did but I wouldn't know maybe is d tire cos I bought new 4 tyres that is higher than d specified one don't know d serial no except I asked my hubby. I use full tank within 3wks within d town n I don't go out more dan 3x a wk @siena pls I need a urgent response

I'm old skool, so don't have a Blackberry, lol. My email address is siena_@hotmail.co.uk

Or you can post your query here, if you wish.

Siena: Things that can make a car thirstier than normal:

01) Dirty / clogged air filter.
02) Incorrect ignition timing. *
03) Under-inflated tyres (higher rolling resistance).
04) Binding brakes.
05) Leaking fuel injectors.
06) Blowing exhaust system.
07) Faulty MAF (mass air flow meter).*
08) Faulty CTS (coolant temperature switch).*
08) Faulty o2 sensor (Lambda).*
09) Thermostat stuck open, or removed by some dodgy mechanic. Over cooled engine.
10) Split / perished vacuum hoses, engine drawing in unmetered air.*

I would suggest an OBD scan, your '03 Honda Accord is fully OBD II compliant. All the items marked with an asterisk will normally trigger an engine check light (CEL). It would help too, if you can recall when you noticed the higher than normal fuel consumption. Did it occur after any work was carried out on the car? The thermostat is an area I would look into - if it's stuck open (or it's been removed) the engine will never reach its optimum operating temperature. The CTS will sense the engine is not hot, and the ECU will send more fuel through the injectors as a result. This is done by altering the duty cycle (the amount of time the injectors are held open will be longer).

Tyre pressures are also important, if the pressures are too low, the rolling resistance will place more load on the transmission, then the engine will work harder. The same goes for brakes that are binding (sticking on).

Chynx: Nice one Siena. You ar too good!
Kindly advise me on this issue:
My car (Nissan Altima 2.5s 2002 model) no longer accelerates as usual. When driving normally, it always drags when I try to move faster except I step hard on d gas pedal then I get this roar and subsequent surge 4wrd with serious muscle.
I have serviced d injector, changed d fuel pump and washed d fuel filters, yet no improvement has been noticed. In addition, my car no swallows fuel more than I gozzle beer. Your professional advice will be very much welcome.

2ndly, I have always suffered dis noise from d front legs each time t drive on rough surfaces like inter-locking tiles. I have changed my 4 shock absorbers, lower arms and thyroids and painfully, d noise hasnt stopped.

Please help me out on this.
My email is c4mine@yahoo.com
May God bless u.

ojeffo: Oga sienna and other gurus in d house...I hv a 2007 honda accord that is gradually getting on my nerves..the most annoying of all the problems is d constant vibration wen on drive or while parked...and I also noticed dt wen d car is on park.d engine will randomly fire itself n drops and keeps doing that.and also some sound coming out from d hood..im very upset with the car.. I hv been to two mechanics and they dnt seem to know what to do with it. .plsss I need serious help and advice

ojeffo:

Haba!!! Nobody is looking at my post...plsssssss

Siena: Things that can make a car thirstier than normal:

01) Dirty / clogged air filter.
02) Incorrect ignition timing. *
03) Under-inflated tyres (higher rolling resistance).
04) Binding brakes.
05) Leaking fuel injectors.
06) Blowing exhaust system.
07) Faulty MAF (mass air flow meter).*
08) Faulty CTS (coolant temperature switch).*
08) Faulty o2 sensor (Lambda).*
09) Thermostat stuck open, or removed by some dodgy mechanic. Over cooled engine.
10) Split / perished vacuum hoses, engine drawing in unmetered air.*

I would suggest an OBD scan, your '03 Honda Accord is fully OBD II compliant. All the items marked with an asterisk will normally trigger an engine check light (CEL). It would help too, if you can recall when you noticed the higher than normal fuel consumption. Did it occur after any work was carried out on the car? The thermostat is an area I would look into - if it's stuck open (or it's been removed) the engine will never reach its optimum operating temperature. The CTS will sense the engine is not hot, and the ECU will send more fuel through the injectors as a result. This is done by altering the duty cycle (the amount of time the injectors are held open will be longer).

Tyre pressures are also important, if the pressures are too low, the rolling resistance will place more load on the transmission, then the engine will work harder. The same goes for brakes that are binding (sticking on).

pak: I have a car with a 3.0L engine. though the fuel consumption has always been on the high side,

however of recent, the fuel consumption has shot to the roof.


It now guzzles fuel like no man's business.

I've had to service the car, the mechanic requested that the spark plugs be changed, which I did.

But the situation hasn't improved considerably.

Now the mech is suggesting I change/service the fuel injector and the exhaust.


Please, I wish i can get expert advice on this cos am quite scared of this trial and error method from Nigerian Mechs.


What do you think caused this and what are the suggestion as regards resolving the problem.

By the way, the car is a Honda Accord EOD 2003 model




NOTES 2013
Alleluya ! My two year old thread finally made frontpage.
Though, I've gotten another car anyway (a second alleluya, pls)
and it seems oga Sienna is no longer following the thread.

For Posterity sake, the two problems I had was
1. Using bigger tyres than the recommended size, as stated below
2. My Mechs put water inside the radiator instead of coolant after servicing, leading to the engine operating at a higher temperature than normal.
Good thing is the car is still on the road, still ran around town with it today.

NUkachukwu: Hi guys, I have a SAAB 95{Eco power, direct ignition}, when ever the AC is turned on, it drags the engine hence the car struggles to move and it consumes a lot of fuel even without the AC turned on. Can anyone kindly advice because I so love that car and do not want it to park up? Thanks.....