I installed new alternator but rpm's are low when idle. w...
Customer
I installed new alternator but rpm's are low when idle. when i come to a stop when car is in drive, car stalls
Mechanic's Assistant: Is the check engine light on? Does the car stall at idle or when driving?
The check engi...
I installed new alternator but rpm's are low when idle. when i come to a stop when car is in drive, car stalls
Mechanic's Assistant: Is the check engine light on? Does the car stall at idle or when driving?
The check engine light came back on. The car stalls when driving if i come to a stop
Mechanic's Assistant: What is the make/model/year of your car?
2012 mazda 3i
Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?
I put on new drive belt but haven't taken off alternator and reinstalled it yet
Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you?
As long as i am pressing accelerator the car wont stall. That's it
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Responses
Chris (aka- Moose)
266 days ago
Automotive Expert
Howdy from Tennessee, I'm Chris aka Moose. Who am I helping today? I'm glad you've come here to get help. I will do my best to get the answer you are looking for. I help many customers, so sometimes my replies are delayed, I will respond once available. I try to be online at 1-5 pm and 10 pm-5 am every day.
Most likely the computer is struggling to relearn the optimum idle strategy after the battery disconnect. I recommend these steps. [https://www.dropbox.com/s/r2cimvb2blyqgnj/Air%20Fuel%20System%20Service.png?dl=0](https://www.dropbox.com/s/r2cimvb2blyqgnj/Air%20Fuel%20System%20Service.png?dl=0) After the battery disconnect is done. Idle the engine for 5 minutes and rev the engine once every 30 seconds.
Thank you for seeking us for help, I hope I provided what was needed. Press reply if you need to follow up. If you liked my answer please let me know so I can mark your question complete. Moose
Customer
266 days ago
thank you. sounds complicated but ill do it
Chris (aka- Moose)
266 days ago
Automotive Expert
Glad to help
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I installed new alternator but rpm's are low when idle. when i come to a stop when car is in drive, car stalls Mechanic's Assistant: Is the check engine light on? Does the car stall at idle or when driving? The check engi...
I installed new alternator but rpm's are low when idle. when i come to a stop when car is in drive, car stalls Mechanic's Assistant: Is the check engine light on? Does the car stall at idle or when driving? The check engine light came back on. The car stalls when driving if i come to a stop Mechanic's Assistant: What is the make/model/year of your car? 2012 mazda 3i Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far? I put on new drive belt but haven't taken off alternator and reinstalled it yet Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? As long as i am pressing accelerator the car wont stall. That's it