C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

High pressure fuel pump

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Old Oct 21, 2022 | 03:39 PM
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Marktee's Avatar
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From: DFW USA
2012 C250 Turbo M271 EVO, 08 X3, 08 328i
High pressure fuel pump

I’m NOT going to buy a new fuel pump. I was looking in the net for a fix. Anyone has an idea how. After flooring the gas pedal yesterday the car went into limp mode.
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Old Oct 23, 2022 | 04:02 PM
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W204 2013 C250 Coupe
while I do not have a fix for this, there is an extended warranty to 10years (I forget the mileage) for the HPFP for the c250s,
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Old Oct 24, 2022 | 02:31 AM
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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
HPFP extended warranty expires at 120,000 miles. But a 2012 model is probably beyond the the warranty’s time limit.
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Old Oct 24, 2022 | 11:24 AM
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c250 W204
Originally Posted by Odd Piggy
HPFP extended warranty expires at 120,000 miles. But a 2012 model is probably beyond the the warranty’s time limit.
They had the nerve to deny mine for being over even though the problem presented in 2016 within what would have been warranty range and they did nothing before.
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Old Oct 24, 2022 | 07:17 PM
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Marktee's Avatar
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From: DFW USA
2012 C250 Turbo M271 EVO, 08 X3, 08 328i
My submarine (as odd piggy calls) is 2012 and 119k miles and has a rebuilt title, therefore I am not going to even try asking the dealer.
Is it possible that flooring the gas pedal causes a huge amount of gas gushing into the pump which in return has small ports and needed to be wider???!!!!
I just want to know whether the issue is electrical or mechanical inside the pump. Like I have said before, the limp mode happened once and I do not know whether my tapping on the pump with a small hammer had to do anything with fixing it. I assume and probably wrong that the pump similar to the starter where sometimes had to be whipped a little in order for it to work again.
Nevertheless if the limp happens again, I will have to remove the pump, take it apart and then explore it and see if I can find the culprit within the pump.
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Old Oct 24, 2022 | 11:46 PM
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Odd Piggy's Avatar
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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
Originally Posted by Marktee
My submarine (as odd piggy calls) is 2012 and 119k miles and has a rebuilt title, therefore I am not going to even try asking the dealer.
Is it possible that flooring the gas pedal causes a huge amount of gas gushing into the pump which in return has small ports and needed to be wider???!!!!
I just want to know whether the issue is electrical or mechanical inside the pump. Like I have said before, the limp mode happened once and I do not know whether my tapping on the pump with a small hammer had to do anything with fixing it. I assume and probably wrong that the pump similar to the starter where sometimes had to be whipped a little in order for it to work again.
Nevertheless if the limp happens again, I will have to remove the pump, take it apart and then explore it and see if I can find the culprit within the pump.
Not trying to insult! Submarine is a term insurance companies use as shorthand for a flooded vehicle. I didn’t think you would ever get it running, but here you are sorting out performance issues.
Your posts on your restoration will be valuable resources.
The HPFP is mostly mechanical. It’s driven by the camshaft. It doesn’t control how much fuel the engine gets; it just provides the high pressure the injectors need to function. The amount of fuel the engine gets is determined by the ECU signal to the injectors with throttle position and other sensors as input.
The HPFPs currently available are rebuilt, so there must be replaceable parts inside. But I have never seen anything on the internet about doing it.
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