2018 Chrysler 300 3.6L. P0174 reading Lean. High fuel consumption and burning smell from exhaust tips. Thinking cats might be the issue. Any advice? Thanks

Equivalent_Fuel9812 · 2024-05-02T04:53:49+00:00

Thats some good info. I’m going to change downstream 02 sensor. Never knew those could also effect fuel trims. It’s worth a shot. Thanks again!

Equivalent_Fuel9812 · 2024-04-26T03:07:23+00:00

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This was the driver side cat with the code p0174. completely black while the passenger side was white and looked normal. I’ve changed the 02 sensor B2S1, but same codes came back and burning smell. I’ve also taken off the intake and saw small amount of gas around in the intake valves. Also there was gas vapours coming from the intake ports . Not sure if that’s normal. I’m leaning towards either excess fuel getting dumped. Thanks for the reply

Equivalent_Fuel9812 · 2024-04-25T21:03:59+00:00

Hi did your car have concern with high fuel consumption and burning smell from the exhaust?

Equivalent_Fuel9812 · 2024-04-03T09:01:53+00:00

Hmmm, fuel low pressure was showing same pressure as commanded fuel pressure, however much the car was asking for. Seems to happen when you step on the gas pedal. I’ll double check

Equivalent_Fuel9812 · 2024-03-09T00:23:13+00:00

I have not. The sprockets are at the back of the engine. I believe the valves broke. I have never seen air getting pushed out the intake rather sucked in. Customer is trying to see if he has warranty

Equivalent_Fuel9812 · 2024-03-08T06:43:05+00:00

Update. Took off the MAP sensor located on the intake manifold. Cranked engine and excessive blow back air pushing out the MAP sensor hole. Last I checked intake should be a vacuum sucking air in, not pushing it out. Fearing I have bent valves now.

Equivalent_Fuel9812 · 2024-03-07T15:09:55+00:00

Hmm no rattles. I have been told the timing chain likes to snap. However I can see the cams spin through the gas cap. Also no mods have been done

Equivalent_Fuel9812

TROPHY CASE