PowerJet - Fuel Saver

[Kiatmobile]

Hi Brothers, Sisters,

 

I'm driving a Hyundai Matrix 1.6(A) and I really regrette fixing the PowerJet Fuel Saver that claims to be fuel savings of at least 10%. It has been with my car for about 2 months already and i see that its worst.

 

Before the fixing of PowerJet, the fuel consumption was about +/-9.7km/l. Now, the most i can go is +/-8.7km/l. What exactly happen? What can i do to improve the fuel consumptions?

 

My driving habits is that i do not give a full acceleration when driving. That's to say, my RPM does not go beyond 3. Is this normal?

 

Please comments and suggest.

 

Thank you.

[Throttleb]

R u driving harder with the added power?

Is your ECU compensating /taking time to adjust?

[Kiatmobile]

Hi Bro.Throttleb,

 

I would say yes, am driving even harder and that even the exchange of gear seems to drag longer than before.

 

Pardon me. I cannot understand what's ECU compensating/taking time to adjust. Can you elaborate more and how can i do a check on it.

 

Thanks.

[Mmythos]

I think there's alot of mechanical/technical stuffs drivers don't understand, just like it doesn't mean a lower cc car is more fuel efficient whereas a large cc car is 'petrolaholic'. A powerful car can move the car with ease, without flooring the accelerator, for less powerful car, usually u need to step the accelerator harder to get the car to move off cos higher torque is required. Get what I mean? Example, the new 735 uses a 6-speed gearbox and travelling at 90kph, the fuel comsumption is around 6-7l/100km, and that is a 1.9ton car, the engine rpm is around 2000rpm, look at wat rpm is ur engine at 90kph.

 

If you look at your engine performance chart, you will realise that the torque usually peaks at around 3/4 of the maximum revolutions. This means that for better acceleration, flooring down the accelerator doesn't help because although power is increasing, the torque is decreasing so by doing so, you are wasting fuel and not maximising performance. So for max fuel efficient, slow acceleration doesn't mean fuel saving and flooring down also isn't fuel saving. Step ur accelerator 1/3-2/3 down for better fuel response and 3/4 down for maximum efficiency...

 

Anyone disagree?

[Kiatmobile]

Hi Mmythos,

 

Thanks. Thank you for your detail explaination. Appreciate that and your time spent on writing to explain.

 

Agree with you in some points and for all i understand is that without flooring down the accelerator would save fuel which i could be wrong. Now, i'll try with your 1/3-2/3 down for better fuel respond and hope the km can be increased.

 

Will keep you guys update and see how it goes.

 

Maybe, others can comment further.

 

Rds,

[Mmythos]

The 1/3-2/3 is subjective, it depends alot of the car, so u need to try and find where is ur car's torquey point...

[Blacvios]

Hi bro if your powerjet is the original from USA, there is a setting whereby how much air you let in when at certain rpm, you can change setting by tightening or loosening the device, if open too much more air is let in causing the ECU to pump in more fuel to your fuel rail, there is no standard setting but by trial and error as it is not the same for different cars

[Esky]

Yeah, that's probably it- too much air going in and leaning out the a/f mixture. Try screwing back little by little.

[Guyver]

Hi Brothers, Sisters,

 

I'm driving a Hyundai Matrix 1.6(A) and I really regrette fixing the PowerJet Fuel Saver that claims to be fuel savings of at least 10%. It has been with my car for about 2 months already and i see that its worst.

 

Before the fixing of PowerJet, the fuel consumption was about +/-9.7km/l. Now, the most i can go is +/-8.7km/l. What exactly happen? What can i do to improve the fuel consumptions?

 

My driving habits is that i do not give a full acceleration when driving. That's to say, my RPM does not go beyond 3. Is this normal?

 

Please comments and suggest.

 

Thank you.

 

Hyundai cars typically more not so fuel efficient due to the weight... from my experience.. the $$ spend to improve fuel consumption is not really worthwhile.. that's just my personal opinion...