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Fuel Filter Replacement

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9.9K views 6 replies 5 participants last post by  Ranger  
#1 ·
I would like to replace the fuel filter on my 1999 Seville STS but I don't know the location. I have been trying to find it in the forums but no luck yet. Anyone have any idea where it is?
 
#2 ·
Re: Fuel consumption improvement STS 1998

On the underside of the car where the rear driver's side person in the back would sit. Relieve the fuel pressure before touching it and have a big bowl handy (and do it outside.)

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Unless it's horribly clogged it likely won't improve much of anything (and if it was horribly clogged, you'd probably be complaining of bad acceleration/misfiring.) It's cheap ($10-$15), maybe worth the effort as DIY, though. :noidea:
 
#3 ·
Re: Fuel consumption improvement STS 1998

Always have a good clean air intake path (filter, throttle body).
Engine /transmission must be well maintained (spark plugs, sparkplug wires, PCV, EGR, sensors, fluids).
Have the car in good shape (tires, suspension, no loose/broken trims) don't add body kits, spoilers, fake convertible roof and such (these are adding drag).
Keep the unnecessary weight out of the car (some people use their trunk as storage box, or add giant speakers and cabinets).
Don’t fall into the “miracle” instant HP and massive fuel savings devices, these do nothing but costing you money.

And you can get up to 30% better gas mileage just from your driving habits. Like it was mentioned, avoid heavy unnecessary accelerations, plan ahead what is the traffic around likely to do so you avoid breaking (breaking is wasting energy), try to drive as safe and as steady as possible.
 
#4 ·
Re: Fuel consumption improvement STS 1998

Air up the tires.... Use the door jamb tire pressure recommendations as the low end of the spec and the max inflation cast in the tire sidewall as the upper limit. Air pressures of 42 PSI in the front and 38 in the rear are good for rolling resistence, fuel economy, tire life but there is a tradeoff in terms of ride quality. The more PSI (up to the inflation limit on the tire sidewall) the better for fuel economy.
When you inflate tires that much, you are not increasing tire life because now the tire will not wear evenly.High in the middle. Also you are eliminating grip, especially in wet situations.