Subaru - Engines - Fuel-economy :: 2002 - Driving Too Hard?
Nov 29, 2015
I have a 2002 Subaru Impreza 2.5 RS with about 151,000 miles on it. And it's an auto. I recently took it to about 5.3K rpms on a stretch and it occurred to me that I might be pushing the engine a little too hard. My oil was all fine, and the engine was plenty warm, I had been driving for about 10 minutes but still. I also don't do this too much maybe like 1-2 times/month but I sort of get paranoid about these things.
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I have an '06 Subaru Forester (4 cyl, automatic) with about 97,000 miles on it. For the past 5 years I've had the car, it's been getting roughly 26-28 mpg on average. Within the past 3-4 months, though, the fuel economy has dramatically decreased. Now, I'm lucky if I get 21 mpg. (I used to be able to get almost 350 miles per tank, and now if I make it to 275 I'm jumping for joy!)
I took my car to the shop for the 90K service, and they didn't change the fuel filter as a part of that service. (They did replace the coolant, replace oil & filter, replace spark plugs, replace differential fluid front & rear, replace brake fluid, replace auto transaxle fluid, and then they did a bunch of inspections on belts, hoses, brakes, etc.)
I took the car back to the shop after this service so they could change the fuel filter, and they told me that because of the type of fuel filter I have, it should last the lifetime of the car. This sounded a little fishy to me, so is this true?
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My 2001 L.L.Bean Edition H6-3.0 is losing power & MPG on the fwy. Sometimes it will feel like something is holding it back or dragging. I've checked the brake calipers and they're not sticking, changed the air filter, oil & filter, transmission fluid, and still cannot find the problem. I've overfilled the gas tank and read this can damage the charcoal canister. Will a saturated charcoal canister cause a drop in power and MPG? What should I check out next?
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I have a 2002 Chrysler Town & Country FWD with 3.8L V6. Recently, I had an error code of MISFIRE CYL 5. I changed my spark plugs and added some injector cleaner to fuel tank with no results. Then I replaced my ignition coil and the misfire stopped (according to engine computer after reset and smoother engine). While it was misfiring, the gas mileage was reading about 10-11 mpg city. I changed my oil and air filter, switching to all 10w-30 synthetic oil. Since then, my mpg reads around 8 mpg! Before the misfire, I would get 17 mpg in the city.
One other issue that coincides is a 10-12" long thin vacuum hose near the engine snapped and I replaced it with a common rubber hose. The hose I replaced it with was at least twice inside diameter. I think I need to get the reducer/thin hose setup from a dealer. If the vac hose would be reducing my fuel economy by 7 mpg? Or did i screw something else up when changing the oil and coil? The engine seems to be running smoothly and I'm having no noticeable problems aside from paying for a gallon of gas that takes me 8 miles!!
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When using the active cruise control, the acceleration is heavily influenced by the driving mode, with as you could expect eco being more relaxed and power going full steam ahead whenever possible.
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While driving my 1998 Chevy Prizm, my car lost the ability to accelerate but the car never lost power. I managed to pull over and let the car run for a bit before trying to accelerate again..the car only got up to 30 mph and wouldn't go any faster.....after a couple of hours the car run okay. What could be going on? I got new spark plugs, oil change, and an idle air control valve........
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Every time I turn the car on, the "from start" fuel economy reading resets to 15l/100k. After driving for a while it goes down to 4l/100k but then resets back to 15 once the car is turned off. Is there any way to get it to stay at what it finished at?
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While most of the emphasis I've seen on improving fuel economy seems to focus on warming the car up quickly in cool/cold weather, I seem to be experiencing significant mpg drops at the other end of the spectrum.
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I have a 2008 prius. Usually it gets me around 52-55mpg, I've had it since January. Since a couple of days ago its not giving me anything above 49. I know thats a normal number, but considering the fact that its usually quite a bit higher I'm wondering what the cause of the drop is. Also around the same time, when I pull out of my driveway I notice what appears to be a bit of water leakage. Its under the vehicle in the front center, and it only happens when I start the car for the day and pull out of my driveway (its on an incline).
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I am wondering about how fast to accelerate for maximizing fuel economy. I understand with the P&G approach that you don't want to get up to speed too slowly. The question is whether it really is more efficient to go ahead and get up to speed or stay within the ECO guidelines? In particular, I find that getting up to highway speed especially that it can take quite a while to get up to 70 mph without having it going into the power range. It seems like it is better to get up to speed and then back off to go to the high efficiency mode.
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115,000 miles, adult driven. Hard cranking, took into dealer. Replaced 4 injectors - cylinder 2 misfiring. Showed me return gas line clogged with brownish material. Dealer stymied.
Now, Subaru headquarters diagnoses replacing all steel fuel lines, fuel rails, fuel pump...full of rust from inside. Tank looks Ok, as does filler neck. Premium gas used always, added Drygas seasonally as needed.
Question: where the heck would rust come from? What can I do to prevent this problem again? Love the car...would like to get 200,000 from it.
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Our 2006 Forester started shaking very hard while idling or driving. We drove it to the dealer asap, but the violent shaking had stopped. They hooked it up to the diagnostic machine and everything checked out as fine. This problem happens intermittently so the mechanics have not witnessed it. We've even let them keep the car a week and drive it home and back and it never gave them the shaking problem. There is no pattern to when it happens - hot or cold engine, hot or cold outside, just started or been running for awhile, it just doesn't seem to matter. If we give it some gas while at a stop sign it smooths out a bit but it doesn't stop the problem. When driving it still shakes but it's harder to tell how hard. I'm talking about shaking very hard, not just a rough idle.
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Wondering what could cause an increase in fuel economy. My GTI has been running at 29 +/- MPG since the day I bought it, but no higher than 30. I took it out for a ride on Sunday after I changed the front brakes Saturday. The dash tells me it's running at 34. So I filled it up and manually clocked it on a 50 mile trip. I refilled at the exact same pump - just to remove any error. And what I calculated is that the computer is right.
There is no loss of power. However, I've been fighting intermittent misfires on cyl #1 and #2. the misfire on #1 has all but gone away after finding out the coil wasn't sitting right and the spark had loosened up. I've tracked #2 down to either the injector or carbon. I'll be taking care of that next weekend.
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I have the 3.6 and it has been great on fuel economy up until last week. I was averaging about 26mpg and getting near 20 mpg around town. Now my fuel economy has dropped to 15mpg city and 25mpg highway putting the overall MPG down to around 20. What happened? Did I get a bad tank of fuel or is it time for new spark plugs? The car has 34k on it; and when I checked the plugs at 28k they looked like new and gapped to within .002 of the spec.
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I have a 2013 Prius V and my mpg averaged about 43. Now after about 13,000 miles it has gone down some to more like 41-42 and even 39. Once on a mostly highway trip it was down to about 34. Last summer it got 51 mpg in Colorado!
How to get better mileage. I once heard about a feathering technique with the accelerator but I don't know if I understand it.
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The check engine comes on and goes off intermittently. Because it was not on when the situation was checked the diagnostic scan did not show a problem. I have noticed that the gas cap has been extraordinarily tight on two occasions and after the car was refueled, the light went out when it was supposed to when the car was restarted. Today the light came on, but the cap was just normally snug. The car has been scrupulously maintained. It is a 2001 model with 145,000 on the odometer. No other problems are evident.
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I have a 92 Dodge Spirit 2.5L non turbo. I have been getting horrible fuel mileage. Around 17. I have given it a full tune up, including replaced the distributor and hall effect sensor. Why my fuel economy is shot?
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Curious? Looking for if the generation 4 Prius' has less road noise and better acceleration?
My generation 3 is quite noisy inside.
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my girlfriend has a 2002 forester and it is making a very loud noise while driving, sounds like a helicopter coming from the front/right. when you let off the accelerator it changes pitch and sounds like more towards the middle...checked for axle play or anything rubbing and things look ok...very confused, i'm a former VW tech and i've never heard this noise before
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Have not purchased a Prius yet as I have a TDI awaiting results of the lawsuit. I am wondering over the last week or so, Vegas has been really hot. Just wondering how the new battery and the MPG is holding up in the Vegas heat.
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Ok, so I was already getting pretty bad fuel economy from my 3.6 4motion wagon (14/24 city/highway). so last week I take it in to the dealer for 5k oil service. now after the service I get 10/18 (city/highway)!!!!
Car seems to run fine, but for some reason the fuel economy has dropped significantly. Most people on here say they get better economy after the 5k service.
Now the car is at the dealer for a few days for them to check it out. Gave me a old hyundai for a loaner.
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