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2016 Chrysler 200 S, 1998 Sebring JX
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A couple of different things may be going on here.
Check the PCV rubber vacuum hose for cracking/leaks.
Run the instrument cluster self-test and check the fuel tank sender ground G16A & G200.

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Discussion Starter · #3 ·
Thanks for the reply.
Maybe the fuel pump is going slowly off. In a previous thread you told me about one way valve on it doesn't work properly and morning start goes problem.this issue is increased in the last week.
About PCV hose , it is easy to check before go to the garage? Where is it?
 

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Changing the PCV hose should be easy once the top engine cover is yanked.
The PCV valve often outlasts the PCV hose on cars lately.

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Discussion Starter · #5 ·
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Here the first photos from my car. The side in the top is easy to check, the second part is quite hide at the bottom of the intake manifold😔.
In this side looks good, just too hard, i don't know if it's rubber or a kind of plastic
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Do cracks appear when you pinch the rubber? Does the hose attach securely to the PCV nipple?
Any other possible vacuum leaks?
PCM reprogramming TSB #18-080-16 may apply?
If none are found, the electronic throttle body (ETC) might have an issue.
For P0221, see Possible Causes.

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Is that a vacuum or a vent hose? Can you erase the fault codes & see if they come back or not?
 

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Discussion Starter · #9 · (Edited)
I did put this hose back in.
I did erase all the fault code and I drove the car for ten kilometres. No fault appear again. This hose look like vacuum hose.
But there is another problem appear some days ago small and now looks going big.
When i request more power at the engine in driving mode, it have some noises like gun fire. It looks like the engine is out of timing phase. I did change the olds factory coils with 4 new ngk coils but really no improvement. Could be the crankshaft sensor? What about camshaft sensor? It still the factory one ten years old.
But, about this trouble i didn't get any fault message from ECU. Looks strange to me.
 

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2016 Chrysler 200 S, 1998 Sebring JX
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The pop noises are from up front in the throttle body or in the back out of the tailpipe?
Did you replace coils & spark plugs or just the coils?
How do the spark plug tips look? Any carbon fouling?
I doubt that the cam or crank timing is off without setting fault codes.
Possibly a fuel mixture issue? Low fuel pressure from a failing pump?
Measure fuel pressure while driving?
 

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Discussion Starter · #11 ·
Pop noise i have to check where it come from. What's the difference?
I did replace only the coil, no spark plugs, because technician told me they was ok. They have approx 90000 miles, or 130000 km. Maybe it time to change?
About fuel mixture my car have double fuel, gasoline or lpg and the problem is with both. If course with lpg the pop noise is little more because LPG have less power than gasoline.
Next step I'll check the spark plugs.
 

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Backfires out the tailpipe may be incomplete burning in the cylinder, then it ignites in the exhaust system.
Pop-back in the throttle body may be from lean mixture, which may help confirm a low fuel pressure or volume issue.
It idles OK (?) when fuel demand is low, but has problems under acceleration when fuel demand is higher.
These are symptoms that helps diagnose the problems.

The spark plug life should be good until 160K km (100K miles). I was just wondering if there were arcing on the porcelain? The old coils can cause this, but the arcing will continue with new coils.
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The 2.4L LEV pkg (ED3) uses the Coppers. The 2.4L with PZEV emissions pkg (EDG) uses the Platinum plugs.
 

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Discussion Starter · #15 ·
Thanks for the explanation, very useful.
The actual condition the car in idle run ok, no problem.
The actual spark plugs were changed 5 years ago from the garage. I don't know if they followed Chrysler spec with platinum type. I suppose yes. In any case tomorrow I'm going to change those, just to pair with the new coils.
 

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Is your 2.4L an ED3 or EDG? If you send me the last 8 of the VIN, I can find out.
What plug type is in there now?
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It is an ED3. You want the Champion Copper Plus RC12MC4.
I sent you a PM.
 

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Discussion Starter · #19 ·
Thanks

About plugs i remember when the garage did change the factory one, they talking about platinum type. It is possible platinum one in ed3?
And now: what's the engine differences between ED3 and EDG?🧐
 

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Platinums are not the correct spark plug. They may last longer (160K km), but the Coppers have better burn characteristics. Copper is a better conductor of heat & electrical current than Platinum.
If you don't mind the (52K km) service interval, I would want the Coppers. They can make a difference in the way the car runs (as ggoose said). See your owners manual:

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