I just recently bought this car and noticed a small lag before the engine starts. I replaced the battery thinking it might be a quick fix but the issue is still there. Could this be from a weak starter or alternator?
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Hello, do you mean a lag "while" the starter turns the motor over, before it actually starts? Or a lag between turning the key to ’"start" and when the starter kicks off? A lag while the starter is turning, but the engine doesn’t fire could be a fuel system check valve that is leaking down while the car sits between use. A lag between when the ignition key is turned to "Start" and when the starter kicks the engine over could be caused by a corroded or poorly connected high current connection to the starter - say a battery cable connection. The corrosion introduces resistance that current literally has to burn through in order to pass enough current to spin the starter motor. It could possibly be a weak starter if there is not voltage drop from the batter to the starter itself. Not the alternator though.
I would recommend having the car’s starting issue inspected by a mobile, professional mechanic, such as one from YourMechanic, to diagnose this problem, get an accurate assessment of damage and cost estimate for repairs.
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