I installed new alternator but rpm's are low when idle. w...
Responses
Chris (aka- Moose)
266 days ago
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
Glad to help
Still not sure what you need?
Have a certified mobile mechanic diagnose what's wrong with your car, at your home or office.
Top Questions
Trending Topics
What others are asking
What does it mean if the message center shows a warning saying “Cross traffic system fault?”
The Cross Traffic Alert system on your car (if equipped) provides important safety when backing out of a parking space. This system is supposed to detect objects to the rear and sides of the vehicle (cross traffic coming down the...
Alternator went out; battery won't stay charged
I would first start with having your battery/starting system checked (https://www.yourmechanic.com/services/battery-will-not-hold-a-charge-inspection) by a certified technician. If the alternator turns out to be faulty, replacement will be required in order to get your vehicle in reliable running condition again. The technician...
Noise when turning wheel
This noise you are hearing is likely coming from the power steering pump. If your power steering system is low on fluid or if the pump is going bad, the pump will make a growling sound. I would recommend locating...
My vehicle is leaking anti-freeze like crazy and I have no heater
It sounds like you may have some coolant that is leaking out, causing the motor to overheat. Or, you could have a bad thermostat (https://www.yourmechanic.com/services/thermostat-replacement) or a faulty cooling fan relay (https://www.yourmechanic.com/services/cooling-fan-relay-replacement) that is causing the motor to overheat which...
Car riding rough over potholes and bumps
Hi there. If you have recently replaced shocks and struts, along with tires on your Accord, but still having a rough ride, it's possible that the stabilizer bar bushings are worn out and need to be replaced. It's probably best...
engine full of gas
Hi there. The issue is the fuel pump relay is malfunctioning and causing the fuel pump to pump to much when it is not demanded. The knocking noise is the fuel going into the cylinders and hydrolocking the cylinders. I...
My 07 Lexus is350 started making a bad clicking or knocking noise this am, my friend has a pocket scanner the code is 7e8 and 7e9
Hi there. Unfortunately, the pocket scanner won't help us diagnose this clicking noise for you. In order to correctly diagnose this issue, a professional mobile mechanic would have to complete an OBD-II diagnostic test with a digital scanner that would...
Truck doesn't like to go into gear while driving
Based on your description, I think one of two things is happening. Either your transmission fluid level is low causing the slipping or there is an internal transmission issue. I would start by checking the fluid level of your transmission....
How do you know when evaporative emission vapor vent tube from fuel tank to evaporative emission canister is faulty?
If a leak in the EVAP system is detected, the Check Engine light will illuminate on the dash and the trouble code related to the problem will be stored in the engine computer. When an air leak is present in...
Browse other content
Estimates
Maintenance
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