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Original issue - car wouldn’t start, suspected phantom drain or battery.
Original diagnosis: faulty starter.
Replaced starter and AOS (made sense to while I was in there) and trickle charged the battery.
Result: Car started and drove to auto store to check charging system: result bad battery (40% charge)
Replaced battery, started but ran rough and eventually choked off.
New suspected diagnosis: detached vacuum line during starter replacement.
Found vaccum line and reconnected, replaced breather line also just in case. Battery at 90% so no phantom drain.
Result: car starts but immediately dies, backfire heard. Tried starting again, car turns over and immediately dies again.
I’m at a loss… the major issue started when I swapped to a new battery. All fuses are in tact, no warning lights other than traction control (typical w/ new battery install). I’ve tried unplugging the MAF sensor but there no change.
What do I need to look at next? Your help is greatly Detached vacuum line Detached vacuum line Reconnected appreciated!