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Discussion Starter · #1 ·
Only when its cold in the winter does this happen.. when I press the brake hard enough the engine rpm drops from normal to almost stalling and bounces back quickly to normal and the dash light dim and come back again to normal at the same time and sometimes it will actually stall on me. any ideas?
 

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Certainly a major power drain is going on then.
To my opinion with harsh braking only the ABS system could be doing that.
Probably it will activate it's solenoids, maybe all together at the same time. Because of the forces involved these solenoids drain a lot of current from the battery.
Certainly in cold winter times not that good of an idea when batteries are a bit lower on power..
So maybe the battery (and alternator) cannot cope with it directly to keep the voltage up and so dim some lights for a moment. The engine needs to push that power to the alternator, hence (big) rpm drop.
Seems to me your battery and/or alternator need some attention.
Or maybe the belt driving the alternator is not all that tight.
Check and check, at first maybe best with a voltage meter on the battery.
If alternator runs fine but the voltage drops (well) below 10 volts you might think of a new battery.
Good luck,
Paul
 
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