Lost power while driving, 3months ago, replaced battery, started and drove just fine. has had a check engine light on needs MAP sensor have not replaced yet. Today, same thing happend lost power while driving pulled over tried to restart would turn over but not start. Blazer was towed to local shop. What do you think is the problem? The guy that towed it said it could be a bad fuel pump?
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did you check that battery is charging with a multi meter ? could be that your alternator has a fault . Icheck battery voltage with engine off and running , voltage should be approx. 12.48v with engine off and around 14v running . if no increase in voltage when running brushes in alternator will need replacing .
throttle position sensor, or check to make sure you have vacume going to the map sensor. Alot of times the outlet on the throttle body gets plugged and there is no vacume at the map--causes it to die. unplug the throttle position sensor and then rev it up and see if its better.
Sounds Like you lost the front pump in the trans. Onley way to confirm is by checking chking the pressures at the trans. If you have the gauges you can probably do this yourself although a trans shop is recommended.
I would check to be on the safe side the fuel filter is going in the right direction. The arrow is pointing towards the engine away from the fuel tank, Then you need to make sure the fuel pump wiring connections are good contact and did not come loose when driving.
Well odds are that your blazer is fixed by now. Either way sounds like a bad battery, that's why you need jumps all the time. Why it would die, there are too many possibilties off hand. So what was wrong with it?