Thread: Car shuts off/ drops idle when coming to a stop

Im back again!

So after i drive my car for about 15 minutes, sometimes when i come to a complete stop i will see my RPM's drop to about 500 the lights on the dash will dim a bit but then it will go back up to about 800 rpm. Also when i am going real slow and turn into a parking spot the car has just completely shut off. Same thing then i try to back into a spot when i shift from drive to reverse my lights will dim and the RPM's will drop.

I have cheked the IAC and MAf both have been cleaned, i have also tried a different IAC and there was no change.

I realized tonight that if im just sitting still can crank the wheel to either side the lights will dim and RPM's will drop. Could that be a battery issue? Am i drawing too much power from the battery and alternator for them to keep up. I am not running heat or AC when it happens. But i do have a few extra accessories wired in, like 3 gauges, 1 12' Sub, water pump for my FSIC and a dash cam.

Any thoughts would be appreciated

Thanks
Dan

Year/mods are in the sig. Its an 02. The TB was cleaned about 5k miles ago i can take a look at it though.

It does not have a cat installed right now.

Actually the check engine light is not on and i do not have the rear o2 sensor tuned out.

01 up you need the cat test killed with the rear o2 and cat delete or it can over fuel as its running the dumb test over and over.

Thanks for the info Scotty, that is something i was not aware of. I just corrected that in my tune.

Now any other ideas on why the car will shut off randomly. Also ill add that on about 3 occasions in the past year i will start up the car and it will die instantly, it seems to be idleing too low. I can keep it running if i keep it reved up to 800rpm or above but it is not able to keep it there by itself. Then later that day it starts up an runs fine.

All gaskets were redone 2 years ago when i did the top swap.(about 15k miles) I have had the sub in the car for about 6 years. EGR has been deleted, cleaned my air intake filter about 6 months ago, spark plugs were changed less then 1k miles ago. Looksl like im getting 12.7v when the car is off and 14.2v when the car is running.