Question about 2008 Dodge Avenger

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Car is overheating from a cold start to red line within a mile no mater what speed you drive, stop and start driving, or continous driving. Thermostats test ok.

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Then you have an airlock in the system......

Posted on Jul 14, 2010

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Posted on Jan 02, 2017

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Save Money on Gas/Petrol


  1. Avoid idling. While idling, your car gets exactly 0 miles per gallon while starting the car uses the same amount as idling for 6 seconds. Park your car and go into the restaurant rather than idling in the drive-through. Idling with the air conditioning on also uses extra fuel. Also, avoid going so fast that you have to brake for someone. Whenever you brake, you waste the gas it took to get going that fast.
  2. Drive at a consistent speed. Avoid quick acceleration and hard braking. Cruise control will keep you at a constant speed, even when going up and down hills.
  3. Avoid stops. If approaching a red light, see if you can slow down enough to avoid having to actually stop (because you reach the light after it is green). Speeding up from 5 or 10 miles per hour will be easier on the gas than starting from full stop.
  4. Anticipate the stop signs and lights. Look far ahead; get to know your usual routes. You can let up on the gas earlier. Coasting to a stop will save the gasoline you would otherwise use maintaining your speed longer. If it just gets you to the end of a line of cars at a red light or a stop sign a few seconds later, it won't add any time to your trip. Ditto for coasting to lose speed before a highway off-ramp: if it means you catch up with that truck halfway around the curve instead of at the beginning, you haven't lost any time. In many cities, if you know the streets well, you can time the lights and maintain the appropriate speed to hit all green lights. Usually this is about 35 to 40 MPH.
  5. Slow down. Air resistance goes up as the square of velocity. The power consumed to overcome that air resistance goes up as the cube of the velocity. Rolling resistance is the dominant force below about 40 mph. Above that, every mph costs you mileage. Go as slow as traffic and your schedule will allow. Drive under 60-65 since air grows exponentially denser, in the aerodynamic sense, the faster we drive. To be precise, the most efficient speed is your car's minimum speed in it's highest gear, since this provides the best "speed per RPM" ratio. This is usually about 45 to 55 miles per hour.
  6. Use A/C only on the highway. At lower speeds, open the windows. This increased the drag and reduces fuel efficiency, but not as much as the AC at low speeds (35-40 mph). The air con - when used a lot - is known to use up about 8% of the fuel you put into your car.

on Jul 31, 2010 | Acura Integra Cars & Trucks

3 Answers

2004 hyundai elantra.. car had coolant leak the other day and temp gauge went past red lines. Leaking out the passenger side front of car, round piece with hole in it.. bf put stopleak in it and filled...


Let's go over a list of things here and get everything organized. Most cars have an "open" coolant system, meaning that if it gets too hot (thus increasing the pressure inside the coolant system), the reservoir or radiator cap will open up and allow that pressure to release, or the coolant to expel - which would cause you to spill coolant.

After it cooled down, you were able to drive it for 70 miles - presumably on the highway/interstate/freeway, or another road that may not have a whole lot of stopping.

Then you started driving in town, most likely with stoplights or stop signs. The car overheated then and you weren't able to get it restarted (which is normal and is a safety feature on a lot of cars).

Fluids are good, the fan is kicking on, and the belts haven't broken.

Okay, so you actually did a pretty good job narrowing this down (assuming I didn't miss anything). The car is doing it's overheating when you're in stop and go traffic, with low airflow. If you are running your air conditioning, try turning it off and see if that keeps you from overheating (assuming the car starts now). If it does, then chances are your fan isn't kicking into high-speed. On some vehicles, you have two fans, on others you only have one. If you have two fans, one will only kick on when the AC is running. If you have one fan, it should have two speeds. A low-speed for simply cooling the engine, and a high-speed for when the AC is running.

If you don't overheat when the AC is running, check your relay box under the hood and search for a relay that should be labeled something along the lines of "Fan 2", "Fan High", "Fan AUX", or "Fan AC". If you find one, replace it or try switching it with another relay. Good luck!

Jun 02, 2014 | Cars & Trucks

2 Answers

Engine overheating after driving for like 20 miles


try flushing the system , try replace the sensors also. there is a possibility that a bad ground can cause this issue sending the wrong info. to the computer . a catalytic gets clogged up and could stop a car after it gets hot but I would first try the other stuff. you could disconnect the catalytic convertor and see if the car stays running before you decide this is it , they are very costly. good luck

Apr 11, 2014 | 1993 Mercury Tracer

1 Answer

Why is mybcm not letting me pass insp there is no code on thi1996 chry lhs what is going on


You mean PCM most states read the readiness monitors depending on the state on how many they allow not to be completed. The first one on the list that is hard to get run and pass is the EVAP Because this requires the car to be cold and fuel tank must between 15%-85% and both air temp and coolant temp with in 10 degrees of each other. Start car let idle for 5 -10 minutes Then drive car normally no hard accelerations or quick stops bring speed to 50-60 mph and coast down to 20-15 mph without brake pedal input repeat this twice.Then bring speed to 58-62 mph and set cruise control run for 12-16 miles exit freeway caught a red light or stop and idle 2 minutes shut car off rest for 5 minutes and repeat freeway drive. then redo morning cold start again . then have some one test the generic readiness monitors to what needs to run and attempt again. California before 2000 1 can be incomplete after 2000 all have to be completed which is hard some will not run for 800 miles.

Nov 08, 2013 | 2001 Ford Escape

1 Answer

Car overheating while driving but not in idle


Head gasket, if you are lucky it might not need a new head.

Mar 19, 2017 | 1994 BMW 3 Series

2 Answers

Hey guys Driving a 2004 Kia Spectra no trim 5 speed manual trans. oil change within three months and about 2 thousand miles heard it might be an 02 sensor not really sure I've recently landed...


take it to a parts store who will run a code check for free If its not overheating and has good oil pressure you should be good to go. dont go to dealers they will burn you every time

Feb 26, 2011 | 2004 Kia Spectra

1 Answer

I have a 1994 Olsmoblie Cutless Supreme LS, 3.1L V6 , front wheel drive, with 3 speed Torque Converter Lock-out type overdrive transmission. The car drives cold or hot fine until It goes up a hill or can...


First thing,

lets start with a transmission flush and filter change. then have you checked any of your vacume lines. A bad vacume line is the number one thing that causes any form of transmission mis shifting. When it gets warmed up the lines alow cracks to open up and mess up the function of the vacume line. Also you need to have the torque converter checked. You also need to have a computer scan on the vehicle. a bad sensor or coputer could cause any of these problems.

let me know what happens when you check these out.

Jun 09, 2009 | 1994 Oldsmobile Cutlass Supreme

1 Answer

Taurus 2003 idling problems


mcdevito75 here, Sounds like the idle speed motor, Ford is known for these idle speed motors going bad, in the later stages the car races like crazy. have your repair shop check this idle speed motor and change it.

Mar 14, 2009 | 2003 Ford Taurus

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