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Question about Power versus Fuel Input


DOCTORBILL
07-14-2010, 10:38 AM
I have an observation and then a question.

I have a long two mile hill I drive up in my '93 Geo Metro (The Phoenix).

I go it in 4th gear and maintain 55 mph - that is about all the old girl can do !

The gas pedal is on the floor, but I notice that if I let up on the pedal maybe 1/4 to 1/2 inch,
the speed doesn't go down.
Thus, more accelerator doesn't give more speed.

When you drove an older car with a carburetor, when you press down on the accelerator,
more gasoline is dumped into the engine.

Now my question is - with the Metro, the Computer and the Throttle Body/Injector, when
the engine is doing all it can, does the computer stop adding MORE gasoline regardless
of the position of the accelerator ?

An older, carbureted vehicle would have just dumped more gasoline and made it rich.

Is my Metro's computer smart enough to keep the fuel at an optimum for the power needed,
or does it add more fuel as I depress the pedal ?

Is my question clear ?

DoctorBill

PS - Is the Chevy AVEO worth squat ? Came out in 2004 - I'm slow on the uptake....
Is it the new Geo Metro ?

Metro Mighty Mouse
07-15-2010, 05:14 AM
To answer your 2nd question, the Aveo is actually a Daewoo from when Chevy and Suzuki purchased the company. Don't know that I would trust one. The true replacement is the Suzuki Aerio. The styling is very odd inside and out and the front bumper hangs too low (I've made $100 repairing 2 bumpers that were trashed at the bottom and pulling off their mounts) but it is a Suzuki from Japan and shares the heritage of our vehicles.

DOCTORBILL
07-15-2010, 10:57 PM
When did the Suzuki Aerio come out ? Probably 4 cylinder full of environmentally loaded crap.

Is the engine truly a Suzuki engine - not some Chinese crap copy ?

My '93 GEO METRO "Phoenix" is still going strong - but getting long in the tooth, as it were.
It is now 17 years old - wow!

I love the little bastard !

But one day, I may have to get a replacement.

You never know when some Butt-Brain will crash into you somewhere...

All the rubber goes to Hell on old cars.

No rust yet that I know of - oil leaks make a mess underneath, but in the end
I think small oil leaks keep the rust away !

DoctorBill

RossT
07-16-2010, 12:10 AM
The previous owner of my 1st metro had problems making it up long hills. Best he could do would be about 50 MPH. Other than that, the car ran perfect. The dealer replaced the fuel pump for him and he said it was like going into hyperdrive. The car flew up the hills.

Just a thought.

carpenter_jai
07-16-2010, 02:36 AM
I've always had to plan my hill approaches with my 3 banger. Even when it had only 100k kms on the odometer, I had to shift down to 4th or even 3rd. I do like the idea that a new fuel pump would put some umph in my upswing. I don't know the answer to Bill's question, but I have noticed that if you can avoid letting the pedal hit the floor, you'll usually be going faster when you make it to the top of the hill.

Jai

Metro Mighty Mouse
07-16-2010, 04:49 AM
Here is the information from Wikipedia on the Aerio

"Models in North America got a larger and more powerful 2.0 L engine with 145 hp (108 kW). A 5-speed manual transmission was standard with a 4-speed automatic optional. All-wheel-drive was available, but only with the automatic. American Aerios came in two trim levels: the S and GS (2002-2004), S and LX (2005), and Base and Premium (2006-2007). Key changes over the years included an upgrade to a new 2.3-liter 155 hp (116 kW; 157 PS) engine in 2004, a major styling and interior refresh in 2005 (replacing the digital instruments with conventional analog ones), and the standardization of antilock brakes in 2006. Only the Aerio sedan remained for 2007, as the hatchback had been shelved to make room for the new 2007 SX4 hatchback. Likewise, the Aerio sedan bowed out at year's end, making way for the 2008 SX4 Sport sedan. Throughout its run, the Aerio was distinct for being the most affordable car in America to offer all-wheel-drive."

The Aerio was wholly manufactured in Japan.

Woodie83
07-16-2010, 05:27 AM
I own an Aerio and absolutely love it, but it is in no way a replacement for a Metro. It is much bigger, much heavier and more luxurious than a Swift/Metro. The best mileage I've ever gotten from it was 33mpg.

Aerio was sold from 2002 - 2007 and has now been replaced with the SX-4. It starts out at $14,000, has three times the power of a Metro, and is EPA rated at 23/33.

The closest thing Suzuki has to the Metro is the Splash, and that's not coming here for the foreseeable future, not as long as gas is under $6. Rumour is that the new Swift is coming here in 2011, but nothing official from Suzuki yet.

Metro Mighty Mouse
07-17-2010, 07:38 PM
On your power issue, one thought is if your throttle is out of adjustment, then wide open throttle may be pulling your butterfly past the full open position to past and closing the air stream off causing a power drop.

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