C63 rough at idle - Error: Ratio too rich - Input appreciated
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From: Gdynia, Poland
'08 C63 Estate
C63 rough at idle - Error: Ratio too rich - Input appreciated
My car started to run a little rougher at idle than usual so I took it for a diagnosis and the STAR software found an error - the fuel ratio is too rich in the first two cylinders.
Could this be a side effect of removing my seconadary cats and replacing them with straigh pipes?
TIA.
Matt
Could this be a side effect of removing my seconadary cats and replacing them with straigh pipes?
TIA.
Matt
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C63 AMG
Probably not. An O2 sensor has to pass a "readiness" test first. Once it passes the ECU adapts. In this case fuel trim cannot be adapted to be lean enough based on O2 sensor readings so the fault code is thrown. Still, it could be defective but I'd be inclined to look upstream first.
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Don't think it is related to the removal of the secondary cats and funny it is just the first two cylinders. First two cylinders or both on one side? Maybe check for an intake blockage of some sort. Maybe injectors are sticking open?
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From: Gdynia, Poland
'08 C63 Estate
I don't know which cylinders exactly. I wrote everything I know in the first post.
My car is getting Service B in two weeks so I'll get it done then.
I just wanted to know if any of you expierenced something like this before.
Thanks for all the input
My car is getting Service B in two weeks so I'll get it done then.
I just wanted to know if any of you expierenced something like this before.
Thanks for all the input
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C63 AMG
Based on what little is know this is a good bet. Normally I would suspect a MAFS issue but that possibility is virtually eliminated with the "two cylinders" thing.
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From: Lone Star State
06 CTT-S
to the OP.. have you resolved this issue/concern?
just recently, the car is having a rough idle/start - to the point that the car almost died.
the last time this happened, i parked the car and after 30 minutes came back and started the car. oil temp was at 190; coolant temp at 180; rpm was just slightly below the first bar (from zero); i just filled the car full (gas); outside temp is 60 degrees; A/C is OFF.
now i'm paranoid that the car might not start or die when my wife drives it.. she'll freak out and might attempt to restart (and restart) the car -- might cause (more) damage to the car?
thanks in advance
just recently, the car is having a rough idle/start - to the point that the car almost died.
the last time this happened, i parked the car and after 30 minutes came back and started the car. oil temp was at 190; coolant temp at 180; rpm was just slightly below the first bar (from zero); i just filled the car full (gas); outside temp is 60 degrees; A/C is OFF.
now i'm paranoid that the car might not start or die when my wife drives it.. she'll freak out and might attempt to restart (and restart) the car -- might cause (more) damage to the car?
thanks in advance
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From: Lone Star State
06 CTT-S
Shell premium gas (93).. i only put gas in 4 shell locations in my area since forever..
no check engine light.. i wish it would do CEL so when i go to the dealership they'd see it.. this morning, it started fine. i'll watch out/observe over the weekend.
anyone think the dealership would bother looking at the car (to check) without the CEL? and all based on my story? car is CPO.. the problem too is that my ever dependable SA is gone and i don't like the last SA that i've dealt with :-(
no check engine light.. i wish it would do CEL so when i go to the dealership they'd see it.. this morning, it started fine. i'll watch out/observe over the weekend.
anyone think the dealership would bother looking at the car (to check) without the CEL? and all based on my story? car is CPO.. the problem too is that my ever dependable SA is gone and i don't like the last SA that i've dealt with :-(
Thread Starter
MBWorld Fanatic!
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From: Gdynia, Poland
'08 C63 Estate
Either I got used to it or it's working smoother now.
I don't get the error when connected to STAR any more.
I was told that it was caused by bad fuel but who knows.
I don't get the error when connected to STAR any more.
I was told that it was caused by bad fuel but who knows.
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From: Lone Star State
06 CTT-S
anybody have experience with a dealership that charges diagnostics fee up front?
i mean, they need to diagnose it right? otherwise, how could they know what is wrong (or not wrong) with the car?
*hopefully just a bad gas - as this is the only variable that have changed/happened in the last couple of days. full gas from that one shell location. if this is the case, then the dealership won't find anything then??? is it still worth having the car checked? or wait for a few more days to observe the car?
i mean, they need to diagnose it right? otherwise, how could they know what is wrong (or not wrong) with the car?
*hopefully just a bad gas - as this is the only variable that have changed/happened in the last couple of days. full gas from that one shell location. if this is the case, then the dealership won't find anything then??? is it still worth having the car checked? or wait for a few more days to observe the car?
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Joined: Nov 2007
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From: Lone Star State
06 CTT-S
