Do I need to replace my fuel injectors?
My 1997 Chrysler Sebring JXi 2.5L hesitates when accelerating and runs rough
at idle. Adding a can of Sea Foam to each tankful of gas greatly cuts down on
this happening. ArchOil Fuel system treatment also works well- but the problem
returns without these additives. I've had the fuel injectors (original to the car) cleaned but
it didn't seem to help- should I replace them? possible other sources of the problem?
This is delayed acceleration and is caused by the engine not getting sufficient power; fuel & air. The leading cause of this is a dirty or defective mass airflow sensor. Next, it could be a defective throttle position sensor or a problem with dirty/defective injectors. Next would be a failing fuel pump or something in that system, like the filter or fuel pressure regulator, or leaks in the air intake.
How many miles on your car? I would do as Ed says but you may also want to try Techron fuel additive which is the best in my opinion.
118,750 miles and otherwise in great shape. I'll give the Techron a try.
You've already tried two fuel additives with temporary results. Why don't you just stop at a parts store and have codes read, probably free. That will likely narrow this down. Two band-aids; why do a third, unless you intend to make intravenous.
Just circling back, I wasn't able to get the parts stores to check for trouble codes (they've suspended this service temporarily due to Covid19). I bought a scanner from Harbor Freight and it did not detect any trouble codes. I decided to replace the throttle position sensor, idle air control valve, and MAP (manifold absolute pressure) sensor (turns out this car does not have a mass air flow sensor). I also cleaned the throttle body and replaced the air filter. Happy to report the car is once again running smoothly. Most likely the culprit was the MAP sensor- it was partially fried when I removed it. Thanks for all your help!