It's been two days since I gutted the airbox and so far I am getting horrible gas mileage. Granted, I have only been driving to work and back (about 5 miles each way) but the DIC says that I am getting about 13 - 16 mpg? Whats did I do wrong? I just replace my plugs and wires about 10k miles ago so I don't think that would be the problem.
If it's not helping, change it back. One thing on intake mods is that often people think "louder is freer" but usually louder is just more turbulent, hence the noise. Turbulence means air flow is worse. Not saying the airbox mod doesn't work. But not all removal of stuff in an airbox is always helpful. My airbox is almost a thing of beauty (especially compared to many OEM airboxes) as it is well shaped to transition air smoothly up into the MAF and down into the intake.
Anyway, a less restrictive intake and exhaust will lower pumping losses by the engine (less power required to pull air in and less required to push it out) and in the same driving, economy should improve. If you floor it all the time, it will be worse as more fuel is used to mix with any more air that is added. I think exhaust makes a more noticeable economy improvement, as a generalization.
But a lot of mileage is the driver. I can squeeze pretty impressive economy out of most any car when I want to. Some people manage to squeeze pretty crappy economy out of most any car when they want to...
Don't get me wrong, I love the mod. Makes the car drive easier. I guess the increased airflow actually works, but I guess I am just afraid. Afraid that it did indeed lower my gas mileage. I looked up the stats on a 97 aurora and it said 17 city. So if that is true, I can probably live with it. But I DO love how it makes the car drive "easier" and more "V8ish."
On another note, I, the mechanically challenged one, took my engine cover off the other day. I actually told myself that I can do repair to the car like spark plug and wire changes. But I have to flush out the radiator first. I need to quit jumping the gun.
Thanks for listening to me. Sorry for all my constant whining to you. I do , believe it or not, like the airbox mod. I think I want to do more!
P.S. Any ideas what I can let my old antifreeze flow into while I do the flush. I don't have jackstands, so it would probably have to something very height challanges? Or should I go ahead and buy jack stands?
If I were you and was planning on tackling some maintenance projects in your driveway, I would scour Ebay or something for the 1997 GM G-body shop manual. Then get your jackstands, then go for the work. You'll feel better doing the work, knowing you are more educated on the task at hand.
I just bought an RSM intake pipe (no filter or reducer yet) and the 2 volumes of the GM shop manual.
You could get a large flat pan from a hardware store, probably, or a large kitty-litter pan. But it will be hard to pour the anti-freeze into a subsequent container. Flushing the radiator is very easy, just take your time and be careful.
If it is your first time doing any real work on the car, make sure you have a second car or a friend who can pick you up, if you suddenly realize you forgot to buy something or broke something during the procedure. And don't figure it'll take an hour to do, therefore you can start on it 2 hours before you have to be at your wedding...
Last Edit: Jul 4, 2004 11:49:01 GMT -6 by Aurora40
I'll probably leave Sunday, early morning, stay in Syracuse with my buddy overnight or something, get a head start on Monday morning, its about 6.5-7 hrs from Syracuse NY to Cape Cod MA...we'll need directions...we can talk later bout that. I'l be staying for 2 or 3 nights for sure!
Ohh Sharp today huh 40? LoL I would like to point out for the record NONE of those accidents were my fault… one I wasn’t even in the car for… the other was in a parking lot and my car wasn’t even in motion for!! Ok good enough for now LoL…
Amanda H. 1995 Aurora White on Black (sold) 2001 Lincoln Conti Special Edition Black on 2tone Charcoal (traded - I'll miss that car) 2001 Aurora Burgandy over Tan 4.0 (Devil Car)
Since this seems to be such a hot thread I guess I will post this here. As everyone knows by now I recently modded my airbox. My gas mileage started being a horrible 15-16mpg.....turned out one of my tires was low in air.....so I filled it up and got her back up to 16.5 mpg. That still sucked, but I thought the performance aspect of it was worth living with the bad mileage. Recently, as in the last week, my gas mileage has returned to around 15 mpg (15.3 mpg today). My tires are all at the proper air levels. Could it be bad spark plugs? I just had them replaced about 4 months ago along with the wires. Do you thing it may be something else? HELP!!!!!!!!!!!!!!!!!!
Woohoo!!!!!!!!!!!! I've got a beautiful woman taking pity on me I don't remember what plugs were used............probably some cheapo plugs............where are the 02 sensors and how hard are they to replace?
Well, ok, plugs are very important on this vehicle, I highly recommend the stock platinum tipped plugs. The Northstar is very fussy about its electical components and stock (OEM parts) is best for plugs, wires, coil packs etc.
Also I assume you are running high grade gasoline? Try running some fuel injector cleaner thru the system. Also make sure your IAT sensor on the air box is tightly attached. Hrmmm what else? Oh MAF screen, could be clogged up. The screen is where the intake tube meets the throttle body.
I dont have my service manual yet, so I cant say for sure the o2 sensor locations yet!...sorry bud
The thing about plugs on 90's GM cars is that they use waste spark. This means the spark fires on the power stroke and on the exhaust stroke. This is also why there are half as many coil packs as cylinders. Anyway, the result is that your plug fires in reverse directions all the time. Most platinum plugs are only platinum on one side (as the spark usually only travels one way on most cars). On a GM car with waste spark, this means every other spark, the non-platinum side is getting zapped away. So many platinum plugs on a GM car will work for a few months and then crap out. If you bought cheapo plugs, this is the first thing I'd check if I were you.
On an aside, the 2001+ Aurora does not have this problem, and I plan on swapping to ACDelco Iridium plugs at about 50k.