When the temp is below 40 degrees (f) my Jetta's engine will not start, it takes a "jump start" to get it going. I turn the ignigtion on and off 2-3 times to warm the glow plugs. But it seems like the battery is just drained. Any Ideas?
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Re: Cold weather starting
I think you are ready for a battery, especially if it's never been replaced. You can take it out and have it tested for free at autozone or many other good parts stores. It may start when it's warmer because the oil is thinner and it takes less effort to turn the engine then.
I've replaced the battery within a couple of minutes (my battery tested good) without having to set the radio code. Beware if the battery is out for any length of time, you may need to have some of the ECM reset. Best best is to figure out how to get the battery out and unhooked at home WITHOUT actually doing it, then go to parts store with the tools you now KNOW will work, pop it out, put it on their tester, and get the old or new battery back in the car soon. I don't know how long you have, but I seem to remember everything being OK for 15 minutes or so.
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Since batteries lose almost half their cranking power at freezing, and since diesels require much higher fuel temps to start than gasoline engines, many recommend using a block heater whenever the temperature is under 35-40 degrees if starting becomes a problem.
cold weather kills batteries this time of year...heres why..most batteries are a chemical factory..the acid and water separate as the battery discharges..also the chemical process is lessened when the air temps go below freezing by around 50% or more depending on the age of the battery..in extreme cold areas, external heat sources are required to keep engines warm enough to run..in alaska for example,the batteries are taken out entirely and put inside to keep warm..sometimes a fire pit is used to warm the engine from below (red hot coals no flame)..also in very cold weather, the engine oil will get very thick..in some cases the oil will actually glue the engine semi solid..locking it up..if its a cheaper oil that whathappens..I like 20 miles north of st louis in illinois and when it gets below 30 degrees outside i place a under cabinet 350 watt heater(used for keeping food warm to serve) upside down under my engine overnite..this keeps the block warm and the oil thinned out..and works very well for me..my car will start whe no one elses will in my neighborhood..hope tyhis helps you..
Extreme cold weather is causing coolant to contract and fluid level is reading low level ... After starting with the engine warm the temp light should go off due to expansion of the coolant ... Solution: Add a small amount of coolant to compensate for cold weather contraction. Good luck!
have car scanned look at tps minnum should be around .50 at key on or running
also look at ect sensor if possible when ehgine is cold temp on engine should be within 5 degrees of outside temp
hope this helps.
I recently had a similar problem. I got my car scanned and needed a new catalytic converter. If its already starting to spit and sputter, you probably have 3-6 months to get this done. Mine plugged up one day, and just flat out would not drive anymore. This cost of this repair was about (i recommend changing the spark plugs and wires also) $675....pretty costly. could get a lot more expensive the longer u let it go. Does your jetta run cold, in cold temp? (between 25-40 degrees) if so the thermostat probably took out the converter.