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I picked up a GMC Jimmy before winter, and since the weather has cooled below 0 degrees C, the truck does not start most days. On the occasion when it does start, it runs fine, but often this takes upwards of 5 or 6 tries. The car cranks fine but does not turn over, even when the block heater is connected.
The fuel pump was replaced according to an old receipt, within the last two years, as was the ignition coil. It seems it was once suspected that a security feature was the issue, as the previous owner also had a bunch of keys recoded, but I guess sold it to me (without telling me about the problems). The fuel pump activates when I turn the ignition and there are no engine lights coming on that would indicate what the issue is.
Has anyone experienced similar issues and could offer some advice as to what may be causing the cold start problems?
Check the hall sensor. Check the ignition wire going attached to the solenoid, make sure it is not bare or broken. A worn solenoid can also cause this. Check the starter relay as well.
Can you jumper the fuel pump and make it start and continue to run ? Have you checked to see if you are getting spark when it won't start ? Could be a relay or coil, ignition module, or other component.
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wikiHowFreezing cold weather can take a toll on car batteries. ... It's much more difficult to start a cold car with a mostly-empty tank, so do yourself a favor and gas up ...
I don't know what the manufacturers recommendation is, and probably at that high of a mileage (CONGRATS!!) they won't have one. Based on personal experience, I would say YES... the oil you have chosen to me is probably the best selection you could make... the "10W" means that at 0 degrees F in winter conditions it acts as straight #10 oil would, and the "40" indicates the weight it would act as above 70F.... you want the thinner oil viscosity in cold weather (which is still pretty thick because of the temperature) and the thicker in the warm weather due to the wear on your engine.... plus, the formulation for "high mileage" oils is specifically designed for high mileage engines with a proprietary blend of detergents and additives.
The water expands up to more than 9% when it freeze below 0 degrees Celsius. Due to this phenomena, during the extreme cold weather when the ambient temperature falls below 0 degrees the cylinder blocks of the automotive engines often burst or crack badly.
This damage can be prevented by using the antifreeze coolant in the cooling system.
it often happens in the winter, naturally, the cold weather will have some effect on all the car's system, especially the battery and cooling system. _______________ Easy to get a MST-3
Do you have a good battery? Cold weather is hard on batteries. Also you may need to change to a winter grade of oil. Oil thickens in the cold a makes starting difficult as well. Let me know. Thanks.
You must have a short in the system something must not be working right The short would be constant but the tempatuer would be the factor Disconnect the negitive cable from the battery take a volt meter go from the positive side of the battrey with red lead and black lead to engine block see if you read voltage if so you have a short it sounds like its small a bad ground or lose wire but when its cold battery tend to get drained
The cold weather wreaks havoc on everything. I am thinking that the cold weather and your octane rating are not getting along, hence no error codes. Have you tried fuel drier and or octane booster?Since the truck starts when the temperature gets warmer, I would look at octane as the culprit. Try some octane booster and see if that helps. Let me know. Hope this helps.
Thanks;
Rich
RPM Northwest
my 97 GMC jimmy AC was not blowing cold, recharged with 134
and the compressor stays on but only blows cool air not cold like it used to, please help me, I live in Phoenix, it's already 100 degrees
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