Prius (2010-12) :: Mileage Is Slowly Dropping - Replace Spark Plugs?
Feb 3, 2013
I have 60k on a 2010 Prius III. my mileage is slowing dropping, i am thinking about installing new plugs.?
View 7 Replies
Feb 3, 2013
Advertisement
Prius (Gen 3) :: 2010 Mileage Is Dropping Than Usual
I just bought a 2010 salvage Prius. I have another 2010 I have been driving for 3 years so I am pretty used to the mileage I can expect under different conditions.
When the car is totally warm and I measure the mileage for 15 miles or so I get normal readings of mpg. But with a lot of 2-3 mile trips during the week I am getting about 10mpg less than usual compared to my other 2010.
Prius (2010-12) Fuel :: Mileage Dropping Without Any Apparent Reason
Have had my 2011 Prius all of 4 weeks. Followed PC for months before the purchase, practice pulse/glide regularly and have really change driving habits to increase MPG. First tank was 51 MPG, than 48, 46 and now 45. each one was 75% city driving, 25% freeway.
View 19 RepliesPrius (2010-12) Fuel :: MPG Dropping - Replace With New Tires?
So I bought a used 2010 Gen 3 with ~26,000 miles on it in July 2013. I started out getting 48-52mpg depending on where I was driving. I live in Raleigh, NC and I did notice a drop in drop in MPG over the winter ranging between 44-48mpg but the mpg never rose again as the months warmed and I averaged 44-46mpg for most of the summer. After changing my tires a few weeks ago I've dropped to about 40mpg regardless of where or how I drive. I bought Pirelli P4 Four Seasons 195 65R15 91T and have them inflated to the levels recommended by Toyota. 35/32 or something like that. Is it the tires or is there some other possible issue?
View 19 RepliesPassat (B5) :: 2002 - Changed Spark Plugs But Gas Mileage Dropped To 24 MPG?
As far as I know, my Passat has never had any other spark plugs other than OEM. I could also swear that those OEM plugs always had 3 grounds. My gas mileage historically averages about 27MPG in a mixed city/highway environment.
Recently, my spark plugs were replaced and now my gas mileage has dropped to 24MPG. I had a similar problem once with my previous car (1998 Jetta GLI) and it was due to going from a three ground spark plug to a single ground plug. Putting in three ground spark plugs instantly restored the gas mileage to previous levels.
I've read repeatedly that the NKG PFR6Q is the OEM plug but it only has a single ground. I realize that my memory could be faulty, but this is driving me nuts.
Alas I can't be sure what was there before versus what's there now, but I know my previous mechanic was a stickler for OEM parts. Would switching from a multi-ground to a single-ground cause a 10%+ drop in mileage?
Prius (2010-12) Fuel :: Temps Have Been Dropping, MPG Dropping As Well
Grill blocked today for the first time and have a couple questions.
Temps have been dropping more these last 3-4 days and have noticed my MPG dropping as well so I thought I'd try grill blocking.
Tempts have been and will be high 30s-low 40s in the morning and upper 50s to mid 60s for the high.
At first I just wedged the pipe insulation and drove one trip. I didn't feel comfortable that it would hold for the long haul so I added zip ties.
I used two pieces of pipe insulation 1/2 inch copper / 3/8 inch iron. Up close it looks like 2/3 or 3/4 of the grill is covered.
My two questions:
For fWT, at what temperature should it not exceed?
At what outside temperature should I remove the pipe insulation? In the Phoenix area, temperatures rise in March and sometimes we will have a short period of warmer than normal temps in February. I just want to make sure I do not cause overheating.
Tiguan :: 2010 - How To Change Spark Plugs
I need to change spark plugs in my daughter's 2010 Tiguan but I have never worked on a VW before. How do I get to the spark plugs and what brand is recommended?
View 6 RepliesToyota - Corolla :: 2002 - Tighten Spark Plugs To Same Torque Specifications As Regular Plugs
I am changing my own spark plugs for the first time. I have a spark plug wrench, dielectric grease, anti-seize compound etc.
I have a Haynes manual for my 2002 Toyota Corolla. The book was written before Irridium plugs were used. Should I tighten the spark plugs to the same torque specifications as regular plugs? The book says 158 inch pounds. How do I know I have tightened them to the right amount?
How do I avoid cross threading the spark plugs? What happens if you cross thread the spark plugs (assuming the car seems to be running fine)? Would I need a new engine or expensive repair when it is time to replace the spark plugs again?
Prius C :: Connector On The Spark Plugs Has Different Color
Bought my car three weeks ago. I was looking around under the hood and noticed that the color of the connector on the spark plugs is different. Two are grey and two are black, in alternating order. What's up with that?
View 5 RepliesPrius (Gen 3) Fuel :: Not Changing Spark Plugs Can Drop MPG?
My 2010 prius had been giving low mpg since the last three months. It has now 145K miles.when I bought it a year ago, it had 134K on it. I haven't changed the spark plugs, do they have any effect on low mpg? My mpg is about 39 now,but was 42_45 before.
What are the symptoms for the spark plugs to be changed?
Prius (2004-09) :: Spark Plugs Shot At 38,000 Miles
So in the middle of a road trip 9 days ago my check engine light came on. I was 2 hours into an 8 hour round trip day trip. I was close to a Toyota dealer so I went there for a diagnosis. They said my MAF bank 1 sensor 1 needed replacing but they didn't have the part so couldn't do the fix but I'd be okay to complete my trip. They collected their $100 and sent me on my way with no warning lights on.
30 minutes later the check engine returns and I'm unable to accelerate. I stop the car for a bit and then am able to continue my trip. I have one other incident where when I was traveling at a low speed, I lost all power. I was able to drive home 4 hours with the check engine light on but no further issues with the exception that I got less than 20 miles a gallon for the trip.
Took my car to a local Toyota dealer. They independently diagnosed that the same sensor needed replacing. They also told me that my spark plugs were shot. According to the service rep, they looked like they were from a car with over 100,000 miles.
Is this possible given the description above from the first time my check engine light came on?
Prius (2004-09) :: Necessary To Disconnect 12v Battery Before Changing Spark Plugs
I got the plugs for my '06. I hope to put them in in a day or 2. My question is: is it necessary to disconnect the 12v battery to do this? I've changed plugs in other cars without doing so.
View 6 RepliesPrius (2004-09) :: Changed Spark Plugs But Gaps Were Little Out Of Range
Just got done changing the plugs on my new to me 2008 Prius. They were in there a little tight and the crunching noise they make at first is a little disconcerting, but I'm thinking it has something to do with the coating NGK puts on their plugs.
Anyway, everything went smooth and I took my time and used tips I read about here. I've worked on cars since I was 16 and have rebuilt motors and completely restored a 1956 Chevy, but this Prius is a different animal. I think in the end though we are going to be friends...
Here are some pics of the old plugs. The gaps were a little out of range, and there was some wear, but 148k on spark plugs and the car still runs good?
Prius (2004-09) :: Hybrid Warning Light Came On When Replaced Spark Plugs
My husband just replaced the spark plugs in my 2005 prius with 174,000 miles (also replaced the right headlamp bulb). When I started the car, the PROBLEM check engine light Hybrid Warning Light came on.
Owner's manual says take it to the Toyota dealer. The dealer is 50 miles away. Is it safe to drive it the 50 miles? It drove okay up and down my driveway.
Prius (2004-09) Fuel :: 2006 Noticeable MPG Drop After Changing The Spark Plugs
Right now I am seeing roughly 41 MPG and that is after changing the spark plugs with brand new NGK Iridium's, Air intake filter and did an oil change since it was due for one. I have driven the car roughly 2,500 miles since all of this stuff was done and it just seemed to continue to drop to the 41 MPG mark.
What I have noticed though is that when the motor turns off it shudders and the when it restarts while the car is in park the car will roll back and forth slightly. I have also noticed that the car seems to struggle to get up to the posted speed while climbing an incline and also while the car idles in park or at a complete stop there seems to be a bit of a miss fire. Could that be caused by a bad coil? Because I have tried everything short of taking it to the dealer which I really do not want to do again and be told there is nothing wrong with it when I know there is.
Prius (2004-09) :: Lower Mileage After Spark Plug Change?
Experienced lower mileage after changing the plugs at about 120k miles?
In the 10 months (23.6k miles) since I had the dealer change the plugs, I have averaged 43.3 mpg overall.
Passat (B5) :: 2004 - Gas Mileage Is Dropping On Highway
I have noticed over the past few months that my gas mileage is dropping (from about 29 to 24) on the highway and I seem to have lost some power. I know the car is getting older, but where do you think I can get some of it back? The plugs are only 20K old and the air filter is new.
It is a 2004 1.8t with 109k on it.
Chevrolet - Tahoe :: 2004 - Gas Mileage Dropping On V8
I have a 2004 Chevrolet Tahoe 2WD with the 5.3L V8. Tahoe has 134K. At about 125K miles, I replaced air filter with a K&N, new OEM spark plugs and spark plug wires. The Tahoe has been running great and was getting normal mpg until recently. 15mpg in town and 17mpg on the road is what I normally get. The last 3 fill ups my mpg has been below 13.5mpg. Car still runs great but at 13mpg it's starting to hurt a little financially. Weather here in NC has been normal, my driving conditions or habits have not changed, etc. What could be causing my mpg to drop by so much while the suv still rides smooth and straight?
View 4 RepliesDodge - Ram :: Oil Pressure Fluctuating - Slowly Dropping To The 1/4 Area Of Meter?
1995 RAM 2500 5.9L 2x4...
I think the wire to my oil pressure gauge might be shorting or loose, since the needle sometimes swings from 0 to the middle unexpectedly for no apparent reason. However, during my recent 350 mile trip back from FL to North GA, I noticed that while "stable", the pressure seemed to be ever so slowly dropping to the 1/4 area of the meter. I checked the oil level at every stop and it was never more than 1/2 quart from full. It did seem somewhat "black" given that I changed it and filter about 1,200 miles ago. Also, it seemed the oil was somewhat "channeling" on the dipstick... hard to explain, but it wasn't 100% coating the dipstick like I'd normally expect and seemed like wouldn't "stick" to it. Anyway, there wasn't any foaminess that would seem to indicate water in it... and I've never used any oil additives.
What can cause reduction in oil pressure? After sitting, it seems normal for a while after start-up but then tends to drop. It is possible there is some kind of "sludge" clogging something? The tranny repair guy told me that some oils contain unacceptable amounts of paraffin (a WAX)... told me to never use Quaker State and that he recommended Valvoline. He was "amused" when I told him I use the Walmart brand... Tech or something in the blue bottle. Of course, I'll change the oil THIS week... is that likely to resolve any problems? What else can cause loss of oil pressure? From what I can tell the engine seals are OK since there are never any "puddles" underneath.
Subaru - Outback :: 2015 - Gas Mileage Has Been Steadily Dropping
Gas mileage as stated by Suburu for the 2015 Outback (2.5 engine) is 25-33 with a combined of 28. Mine has never attained that and it has been steadily dropping. Now it is displays as 19 mpg. It is new and has just under 500 miles on it, and I read that the break-in is 1000 miles. That being said, shouldn't I be seeing better MPG than that?
BTW - I am hoping that I am just not being fair (to the car and to Suburu) and that I'll be up in the advertised MPG's soon after I hit 1000 miles.
Lexus ES 2013+ :: Do Cold Weather Impacts On Mileage Dropping?
With the colder weather in the NE, I am experiencing lower mpg with the ES 300h. We have had several cold days here, and my mpg seems to be going down. My driving habits have not changed.
View 5 Replies