I have a 03 Honda Civic LX sedan and my lights dim and my dash gauges go up and down then stays down. Car drives fine then once I shut it off, the car won't start it just clicks rapidly but I just got a brand new battery and I got the alternator replaced but I don't know if it's a faulty alt or something else also my car idles close to 2 rpm and will go to 1 rpm then slowly decrease. Pls help I have no idea what to do

 

It looks like you may have a CEL active. Have you had the codes pulled?

 

no not yet I was gonna take it up to advanced to get the codes pulled but the check engine light been on for awhile and I thought it was because of my gas cap.

 

did you replace the alternator before or after this started happening ? specifically where did you get the alternator ?

 

After it happened because my car was perfectly fine until I jumped some one vehicle and the day after my car starts acting up and I got the alt from like a place that gets wrecked cars and they take the parts off and resell them

 

When boosting a car battery follow this rule:

‘Red from the dead, to red on the good.

Black from the good, to under the hood.’

Red positive on the discharged battery to the red positive on the boosting car battery (while car is running).
Black negative on the boosting battery to the chassis or ground cable of the discharged vehicle. (Never to the black negative of the discharged battery!)

Just in case you boosted incorrectly and caused your issues.

 

Do you have any ideas of why my car is acting strange but thank you for that tip

 

have your car scanned for codes

 

Okay I'll have to do that tomorrow since I had to get a ride but I'll check that out, thank you I appreciate it

 

I have had electrical problems before and it eventually was the alternator and the alternator ground. The ground for the alternator is the bolt and bracket that adjusts the tension of the alt belt. That bolt causes issues with proper grounding and electrical issues.
Get the CEL code and report back as mentioned already.

 

Okay I'll get it checked out and let you guys know tomorrow what I get back, thank you for all you guys help I appreciate it