99 blazer wont start in cold weather
#1
12-24-2019, 06:38 PM
99 blazer 4d wont start when cold
Hi I have a 99 blazer and for some reason I cant get my truck to start in the morning when it's cold it click a few times when I turn the key but nothing else, it starts right up once it gets a bit warmer out. my battery is reading 12.2 with the voltmeter any help would be appreciated
#2
12-24-2019, 06:43 PM
99 blazer wont start in cold weather
Hi I have a 99 blazer and for some reason I cant get my truck to start in the morning when it's cold it click a few times when I turn the key but nothing else, it starts right up once it gets a bit warmer out. my battery is reading 12.2 with the voltmeter any help would be appreciated
#5
12-24-2019, 09:03 PM
I think I've heard of temperature sensors not working causing the computer to think it is warmer than it is and causing hard starts in cold weather.
#6
12-28-2019, 06:30 AM
If I correctly read your symptoms when cold outside the starter will not be able to turn the engine.
Once it gets warmer it will turn the engine and it will also start and run. If this is the case I would simply suspect the battery to be down on charge at 12.2. Volts.
At 12.2 Volts without load applied a lead-acid battery is nearly half down on charge. (Roughly at around 60 percent)
Should read at least around 12.4 Volts without charge even in cold weather to properly start.
A fully charged battery at room temperature or higher would have a resting voltage of 12.6 Volts
When possible a defined load can be applied (resistance) or the voltage measured at the time somebody turns the key.
The drop in voltage will tell you what the state of the battery is.
Try charging the battery over night, if possible by removing it and placing it in a warmer place.
Take the usual precautions for charging batteries (fire hazard and such).
Sometimes it is just an older battery and some short trip driving where the battery never gets fully charged.
Also consider switching all appliances off before shutting down the Blazer and switch them on only after the engine is running.
At the same time consider, that with even just the lights running and the HVAC fan at low, at idle, the charge from the alternator may just be enough to compensate the load but not to actually charge a battery.
Cold temperatures further reduce the batteries capacity.
Once it gets warmer it will turn the engine and it will also start and run. If this is the case I would simply suspect the battery to be down on charge at 12.2. Volts.
At 12.2 Volts without load applied a lead-acid battery is nearly half down on charge. (Roughly at around 60 percent)
Should read at least around 12.4 Volts without charge even in cold weather to properly start.
A fully charged battery at room temperature or higher would have a resting voltage of 12.6 Volts
When possible a defined load can be applied (resistance) or the voltage measured at the time somebody turns the key.
The drop in voltage will tell you what the state of the battery is.
Try charging the battery over night, if possible by removing it and placing it in a warmer place.
Take the usual precautions for charging batteries (fire hazard and such).
Sometimes it is just an older battery and some short trip driving where the battery never gets fully charged.
Also consider switching all appliances off before shutting down the Blazer and switch them on only after the engine is running.
At the same time consider, that with even just the lights running and the HVAC fan at low, at idle, the charge from the alternator may just be enough to compensate the load but not to actually charge a battery.
Cold temperatures further reduce the batteries capacity.
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