My mpg has deteriorated severely (51-43 mpg). I am using Torque with a ELM 327. I measured the fuel air ratio below 10 almost all the time, both the calculated and measured. this seems a little rich. What the correct ratio should be?
View 4 Replies97 shortie. 3.0 245,000 miles. I've already cleaned the throttle body and the idle air control valve. Throttle position sensor reads 5 volts, good ground, and a smooth voltage increase from idle to wide open throttle and back down. Which of these codes is most likely to cause erratic idle? Mostly in the morning.
P0340 Camshaft position sensor.
P1443 Evaporative purge flow sensor.
P0401 Insufficient EGR flow.
P0171 Air/fuel ratio is too lean or rich for PCM to correct.
I doubt it's number 1, and number 4 seems too general to be any use. I'm leaning toward number 3. Seems I read somewhere that the tube from the exhaust gets plugged up. This started when I disconnected a plug from the blue air bag box to get rid of that beeping. Coincidence?
Driving on my original tank from dealer today from Upstate NY to NYC. On the way my C had 4 bars to begin then went to 3, then 2 after about 90 miles of traveling at avg of about 55mph. I watched the cruising distance go down to 1 but I still had 2 bars on my fuel gauge (and my crusing distance was conservative compared to my mpg reading the whole trip, which was hovering around 58mpg).
The gauge went from 2 bars to one flashing bar in about 1 minute. I pulled into a gas station about 2 miles ahead and put in about 5 gallons... this put the fuel gauge up to 3/4s or about 3 bars above the halfway mark. What gives? I know there are fuel gauge issues but I thought with two bars I would have had plenty of time before I needed to fill up on these roads with these mpgs.
I have been debugging DTC codes 2237/2238 and what sounds like detonation in a failed catalytic converter in my old 2007 Prius (375,000 miles!), I just removed the wipers and cowl yesterday to look at the air/fuel ratio sensor connection, and my connector appears to be melted somewhat, sides of the connector show signs of melting I am guessing that there is a connection problem stemming from this and the root cause of my DTC codes.
Can the four wires each side be removed so I can get the connector out to look at it carefully?
Can the bad connector be removed and the four wires be simply spliced together to get the air/fuel sensor working again? I did note that the colors of the wires going in are NOT the same as the colors of the wires going out.
I am getting code p0420 and want to replace the air/fuel ratio sensor and cannot figure out who to reach and remove the connector to the sensor. How to do it? I read several threads about it and saw instructions for the rear O2 sensor but not the fwd air/fuel ratio sensor.
I hope to remove it from below and avoid removing the inverter. From under the car I can see the cable leaving the sensor and I think I see it terminating in a connector on the left side of the engine. I can barely snake my arm up there and touch it, but I cannot get a good enough grip to press a release button and pull it free.
I got the rear O2 sensor changed in about 45 minutes.
Is it possible to tune ECU settings to increase compression ratio and adjust sparks timing for higher octane fuel for octane 98 gasoline or ethanol E85 octane 106?
View 8 RepliesI recently had my fuel pump replaced in my 2005 GTI ... twice. Both times, the fuel gauge no longer shows a full tank, and doesn't show empty tank correctly. Is there some way to reset the gauge? Is the pump somehow tied to the gauge, or did the mechanics mess the float up when they changed the pump? Sadly I had it repaired somewhere other then the dealer.
View 1 RepliesAfter my 2005 Nissan Sentra check engine light came on I had the codes read. The code is indicating that there is a lean air/fuel ratio mixture. I'm thinking this may be a false positive(bad sensor), clogged fuel injector, etc. The light has gone off and come back on. I live in Utah where the cold weather may play a factor. How to diagnose the real problem, or where I should start?
View 8 RepliesI got an 04 Nissan Sentra and I got a (P1273 Nissan - Air Fuel Ratio Sensor 1 Lean Shift Monitoring Bank 1) code that popped up on it. Looking to see what the probable cause for this code to pop up? Is this a rare code that popped up on this car? There's no noticeable symptoms going on with the car.
View 9 RepliesI have a 2013 F450 Platinum and I love it. I would really like to get my gear ratio closer to 3.73 for fuel economy. Have not been able to find replacement ring and pinions to go to 3.73, so my only other option is to do it through changing tire size. I have 4.30 gears and based on what I have found, 37 inch tires will get me really close to the 3.73 ratio. I want to keep my truck as close to factory as possible, but I do want to do a leveling kit.
So can I fit 35x12.50x17 Toyo MT under my truck with just a leveling kit and use the stock rims? If not, what are my other options?
I have seen the option to swap to 22" shaved Alcoa's, but don't really want to go through all of the spacer/adapter stuff.
MY 2000 300M has a problem with the fuel gauge. When over 1/2 a tank and just under the full mark the gauge will randomly drop down to empty and turn on the low fuel light then go back to the correct reading and will do this over and over again. my mechanic has looked at the car believes it's the sending unit. Just wanted a second opinion before I spent the money for a fuel pump module for the car.
View 7 RepliesI just purchased a used 2010 fx2 screw with 5.4 and 6-speed auto. How can I find out what rear gear ratio the truck has? do I have to contact a dealer to find this out or are their any web based sites that can decode the vin? Is the gear ratio marked on the truck anywhere?
View 2 RepliesWhile 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.
View 8 RepliesI am new to the prius 2010.
I filled up last week and I noticed that as soon as a single cell display in the fuel display part has some empty section like 3/4 fuel(single cell) the next day or after that that whole cell disappears without it showing that single cell as being empty.
Around which fuel cell, when displayed, is it important and recommended to fill up gas again, with one cell remaining or two etc.
When I go out to do errands around town (I live right in town) I get horrendous gas mileage. Now, I understand gas mileage is high at the beginning of a trip, but for this long and this high and under these circumstances? I'm getting ABOVE 10l/100km when I have 80% charge available (for americans, that's disgustingly high MPG like, pick-up truck high), AND my foot is completely off the gas. Literally, coasting, or braking, and I'm still sucking up gas. What the heck?
Is this just because it takes a certain amount of time for the engine to run no matter what or something? I still don't see any reason for me to be eating up all that gas when my foot isn't even on the gas AND most importantly, I have charge available. Feels pointless for me to use my car for what I use it for 70% of the time, which is for quick errands around town at low speeds. Thought the prius was suppose to be a superstar for this kind of thing.
So my fuel light started blinking after 480 miles. How much more can I drive it? The display shows 30 miles left before fill up but I read in the manual that when the fuel light starts blinking there is 1.6 gallons left so should that be like 75 miles left. Just wondering. To be on the safe side, I went to fill up.
View 19 RepliesI was heading to the gas station with one bar on the fuel gauge. When I got there to fill up I had two bars, same Miles To Empty (45). What would cause that?
View 6 RepliesHow to set TPS to the correct position? I removed it while cleaning the throttle body, and now I can't seem to get it positioned correctly. The engine keeps revving its self while in park. I read AllData's instruction about starting with a 15 degree rotation to the right and then adjusting it using a Toyota hand held meter (which I don't have).
View 2 RepliesRecently had HV battery replaced by dealer in my 2005 with 129k.
2 days later the 12v went dead. I removed and replaced it, no problem except when I tried to go to my nav the screen said "please install correct map dvd".
I have never had a problem with my nav since buying the car new in 2005. I assume the problem is connected to the loss of 12v power. The player is under the pass seat.
I have my 2012 Pruis for 3 month now . I am only getting 40 - 43 MPG max . I drive my car mostly around town.
View 11 RepliesI've been driving an 2007 Prius unitl last week, when I upgraded to an 2010 model. I'm very happy with it so far.
View 15 Replies