Can a bad car battery cause engine misfire?
So everyone on hear that says a weak battery cannot cause a misfire is wrong especially with a Subaru!!! I recently ran into this exact same problem with my 2013 Subaru Impreza 2.0L. My car began to have a rough idle anytime I was sitting at a stop light. Then the CEL came on for a misfire in the cylinder and the dealership wanted me to do $1000 worth of work replacing the coil packs and spark plugs. I specifically asked them if a weak battery would cause the problem and they said no as well. I knew my battery was weak because I couldn't leave my car radio on for 5 min with out the battery dying. All battery tests I did said the battery was fine. Today I finally got sick of having to worry about it not starting from leaving the door open or the radio on while it wasn't running. Sure enough my check engine light turned off and now my car has greatly improved performance! Also my car now idles like it is supposed to. I'm thinking my fuel pump was not getting enough power which caused the misfiring. Either way the problem is fixed and I suggest looking into the battery first!
Horrible gas mileage on dodge ram 5.9l?
The 1997 Rams were available with 2 different tire options - stock 245/75/16 or the optional 265/75/16's (this tire is 31.6" tall), if that is the size that came on your truck, I really would not think a tire that is just over 1" bigger is going to be causing the lugging. Now if it came with the 245's (a 30" tire) that might cause noticeable difference. The fact that you are running no muffler could also cause poor fuel economy. Muffler basics: You do not need backpressure if your fuel throttle racing or accelerating, you do need back pressure for cruise speeds and economy. What state even allows no muffler? If you want to stay with the 33's, what gears are you running? You might want to change them, that can make a difference with bigger tires. When I went from stock 31" tires on my truck to 33's, there was no difference in fuel mileage, when I went up to 35's my mileage really dropped, when I went to 37's I changed to 4.56 gears which improved my mileage. My truck is sitting 12" higher then stock with the 37" tires and 9" of lift - with the 4.56 gears I am getting 12 to 13 city. I would say a good tune up, a performance muffler, use your cruise control when ever and where ever you can if it has it. Either drop back to one of the stock tire sizes if you wanted to go that route or put bigger gears in.
How long does it take to repair a head gasket?
You don’t repair a head gasket, you replace it.Once I had a rally car - a bit of a ratty old junker if the truth be told - that had a 2.3 litre overhead cam engine. It was a bit like this, only this one is way nicer:Anyway I was heading off to do a rally on some Friday night. On the Thursday, the day before, I took it out for a blast around the lanes to shake down any last-minute faults, and blew the head gasket. It was too late to do anything about it that night, so next morning, I got up at the crack of dawn, stripped the engine down to the point of having the head off (it was OHC, so that involved also removing the cambox, timing belts, etc. plus the exhaust manifold, inlet manifold and carburettors) By then it was almost 9am, so I drove to the nearest big town - 25 miles away - to get a replacement head gasket set. 25 miles back, and by 10am had the head all cleaned and ready to be reassembled. Engine back together and running by 12pm, I then had to drive it 250 miles to where the rally started. It all went smoothly and I made it with plenty of time to spare.So the answer to your question, for me, on that occasion, for this car, was about 6 hours, including an hour to fetch the parts. Sometimes what you need, apart from the basic skills, which in my case don’t amount to all that much, is a great big incentive!As I recall, the rally ended in disaster, but that’s another story.
Why does my Dodge have blue smoke coming out of the exhaust?
check the intake gaskets on it also they was bad to cause those to smoke when you start them,that and the valve stem seals was bad to go out and cause that too happen,its normal for one to use a small amount of oil between changes,like a half a quart,nothing over that is normal,good luck.
What are some symptoms of a bad idle air control sensor?
Idle air control valves open to allow more air to "leak" into the intake, raising the engine rpms, or close when not needed. When your AC compressor kicks in or power steering is activated as you suddenly turn the steering wheel, the sudden drag on the drive belt will bog down the engine. These systems send a signal to the engine computer telling it they are active and it then signals the IAC valve to open, which increases the engine speed. Without this occurring, the engine could struggle, or die. The IAC valve can cause weird idle issues, mess with throttle functionality or cause the car to die. Sometimes they fail, get stuck or just get all carboned up. Sometimes people have success at cleaning them, but generally it is best to replace them when bad. Idle issues and even problems with the IAC valve may not be due to the IAC valve being bad itself. An idle issue does not mean the IAC valve is bad. It is best to pay close attention to how the vehicle is acting, and then communicate that clearly and as completely as possible to your mechanic. Intermittent problems can be very hard to diagnose. Details will help. Knowing more about the vehicle in question and its symptoms (in detail) will also help in understanding more about what it is doing.
Why is my car shaking and the check engine light flashing?
A shaking vehicle AND flashing MIL ("check engine light") sound like the vehicle is misfiring on at least one cylinder. As @Anna Nguyen, @Brendan Sinclair, @Antoun Nabhan and others have said, it could be an ignition related problem. It could also be fuel-related. If one or more fuel injectors are clogged or dead, that would also cause a misfire in the affected cylinder(s). These are relatively cheap/easy things to check and fix.Other causes (which could be more complicated and more expensive) to fix include contaminated fuel, a bent intake or exhaust valve, a broken valve spring, a damaged piston/connecting rod, and on and on.I recommend getting a scan tool and checking the codes which are causing the MIL to light/flash and I also strongly recommend NOT driving the vehicle until the problem is fixed. If you continue to drive the vehicle as is, you will exacerbate the problem. Dumping unburned fuel into the exhaust due to a misfire will overheat and kill your catalytic converter. A more serious problem like a bent valve can eventually cause you to crater your engine (i.e.: completely destroy the engine).
Is it okay to drive your car without thermostats?
If you take out the thermostat then the coolant will just flow 100% by the water pump. Assuming that your system is properly sized so that cutting off flow with the thermostat will result in the proper operating temperature being met then running without a thermostat will always result in a lower than intended operating temperature.Here are some things that will happen:Your engine will run cooler than the desired temperature most all of the time andit will pollute more since it is tuned to run at the designed temperatureYour heater will take longer to become effective since the coolant is used to warm the heater core heat exchanger so you may, on cold days take longer to warm the cabin andmore importantly, it will take much longer to defrost the windshield using the defroster function.Probably it won’t hurt short term to the car engine itself, I don’t think. But in the long term operating it significantly below the designed temperature could have a number of effects, perhaps on lube viscosity, various carbon buildups that lead to other engine performance problems and possibly permanent damage.I once had a mechanic shop replace the thermostat and flush the coolant. When I get it back the car took forever to warm up the heater and get the engine to the temperature. I eventually took off the thermostat housing and found he had placed it about half way off and clamped it down with the housing out of position- it didn’t leak but the gap on one side pretty much made it free flowing.
What is the cause of white smoke from the exhaust and fuel smell?
White smoke and the smell of raw gas out the exhaust. Is a definite sign of running rich.Condensation well mostly disappear. Along with not having the smell of gas vapors. Once the engine reaches operating temp.Are there any check engine lights displaying. From the ECU/PMC throwing a error code. Causing the engine to run limp mode?When was the last time the fuel pressure was checked? Too much will extra gas, pass through the injectors. Much like changing the Injector Pulse Width MAP.A hanging injector will mostly likely cause cylinder(s) to fill with gas. Depending on what intake valves are open, along with intake manifold. The fuel system stays pressurized, even tho fuel pump is shut off. Allowing the pressure to bleed off through the injector(s). By keeping the system under pressure. Allows for quicker starts. Because there is no lag, while the fuel pump rebuilds the lost pressure.Running that rich can/will cause the oil film. On the cylinder walls, getting washed off leading to scuffing.I could see the white smoke, smell the gas. When adjusting fuel pressure on my super charged CRX Sir, may it R.I.P....
What are the effects of driving a car with a misfiring cylinder?
OK. I am a gear head who loves working on cars and has done so since the 1960’s.If a cylinder is misfiring because of an ignition problem you will, in the short term, just experience a loss of power increase your fuel consumption. In the longer term, continuing to drive it that way could destroy a coil and cost you more money.If, however, the misfire is caused by an injector problem, you could seriously damage your engine. Running that cylinder too lean will cause it to overheat and potentially damage the valve or the piston. If it is running excessively rich the unburned fuel could be washing the lubrication off of the cylinder walls leading to severe wear. In either case, repairing the damage will be expensive.NEVER drive a car that has a problem. NEVER drive a car in which the Check Engine light is on. If the Check Engine light begins to flash, SHUT OFF THE ENGINE, NOW! A problem that to you seems small, if not repaired, can cause a lot of damage that will be very expensive to fix.Read your car’s manual. Do exactly what it recommends. Find a mechanic you trust. Doing preventive maintenance will cost you a lot less than repairing the damage caused by neglecting to keep your car serviced.