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M271 evo long crank

     
Old Jul 29, 2025 | 12:49 PM
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M271 evo long crank
I own a W204 c180 with the 1.8 M271 EVO engine. I bought it at 110,000 km, and it’s now at 180,000 km. Since I purchased it, the car occasionally has extended cranking times(2-3 seconds). The camshaft adjuster and timing chain were replaced at 100,000 km. I suspect the high-pressure fuel pump, but there are no fault codes. The car drives fine otherwise. I’m looking forward to your recommendations.
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Old Jul 29, 2025 | 01:34 PM
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W212 MY'14 M276-3.5NA @75kMi
TROUBLESHOOTING LONG CRANKS
Originally Posted by duratorq
I own a W204 c180 with the 1.8 M271 EVO engine. I bought it at 110,000 km, and it’s now at 180,000 km. Since I purchased it, the car occasionally has extended cranking times(2-3 seconds). The camshaft adjuster and timing chain were replaced at 100,000 km.
I suspect the high-pressure fuel pump, but there are no fault codes.
The car drives fine otherwise. I’m looking forward to your recommendations.
You've hit all the right suspects. Now let's get this starting up normally.

The key is not to replace good random parts.
First well troubleshoot what's wrong.

1 -- Connect your scanner to read tank + rail fuel pressures.

2 -- Scan whole chassis for faults in particular ECU for correlation CPS faults.

Post test results.


Last edited by CaliBenzDriver; Jul 29, 2025 at 01:40 PM.
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Old Jul 29, 2025 | 01:37 PM
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Originally Posted by CaliBenzDriver
Doğru noktalara değindiniz. Şimdi normal şekilde çalıştıralım.
say something
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Old Jul 29, 2025 | 01:46 PM
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W212 MY'14 M276-3.5NA @75kMi

"tee - shey - koor - hay - drin".... is as far I can stretch it
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Old Jul 29, 2025 | 05:17 PM
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Originally Posted by CaliBenzDriver
You've hit all the right suspects. Now let's get this starting up normally.

The key is not to replace good random parts.
First well troubleshoot what's wrong.

1 -- Connect your scanner to read tank + rail fuel pressures.

2 -- Scan whole chassis for faults in particular ECU for correlation CPS faults.

Post test results.
No fault code on xentry. Connected 4 times
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Old Jul 29, 2025 | 05:33 PM
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W212 MY'14 M276-3.5NA @75kMi
Originally Posted by duratorq
No fault code on xentry. Connected 4 times
No fault is good preliminary news.
Now you need to read engine data with Xentry.

>> read ( tank + rail ) fuel pressures.
Last edited by CaliBenzDriver; Jul 29, 2025 at 05:57 PM.
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Old Jul 29, 2025 | 05:36 PM
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Originally Posted by CaliBenzDriver
No fault is good preliminary news.
Now you need to read engine data with Xentry.

>> read tank + rail fuel pressures.
It's been this way for about 80,000 kilometers. The problem has neither gotten bigger nor smaller. I'll check where you said.
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Old Jul 29, 2025 | 07:34 PM
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W212 MY'14 M276-3.5NA @75kMi
Originally Posted by duratorq
It's been this way for about 80,000 kilometers. The problem has neither gotten bigger nor smaller. I'll check where you said.
while you're at it grab the fuel trim values at idle. This will confirm fuel supply.
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Old Sep 3, 2025 | 09:19 AM
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Originally Posted by CaliBenzDriver
Arızanın olmaması iyi bir ön haber.
Şimdi Xentry ile motor sistemlerini okumanız gerekiyor.

>> (depo + ray) yakıt basınçlarını okuyun.



Fuel pressure is 1.5 bar. It should be min 4

What is your diagnosis?



UP UP UP





Last edited by duratorq; Sep 3, 2025 at 09:22 AM.
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Old Sep 3, 2025 | 02:55 PM
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W212 MY'14 M276-3.5NA @75kMi
LOW FUEL PRESSURE
Originally Posted by duratorq



Fuel pressure is 1.5 bar. It should be min 4

What is your diagnosis?

UP UP UP
Great.... almost repaired!!

The 25psi pressure should be near 60psi.

In-tank fuel pump or filter are bad.
Inspect for bad connections then replace new.

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