Question about 2003 Mercedes-Benz Mercedes Benz G Class

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I hav a G class . it starts missing on a constant RPM

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Check air flow sensor and oxigen sensor.

Posted on Mar 18, 2011

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Posted on Jan 02, 2017

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1 Answer

What would cause power fluctuations?


low fuel pressure from air / low fuel level and dirty filters may be the fault.

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I hav a 92 gmc 2500 4x4 with the 5.7 it runs alright when the map is not plugged in but it backfires on decel and runs alittle rich but u plugg it bck in and it miss and hesatas around 1200 rpm and if u...


Check for vacuum leaks the rubber or plastic line may have a hole. Distributor timming maybe off also. Cracked cap or worn comtacts in the cap. Coolant temp sensor affects fuel trim aka rich lean conditions

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1989 mercedes 300se starts and shuts off after 3 seconds replase fuel pump and filter and still whit same problem some one help


Make shure the RPM meter is working. If this signal from the ignition control unit is missing the fuel pump will turn off the fuel pump after some seconds.

Feb 16, 2013 | 1989 Mercedes-Benz 300-Class

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Whining Noise Near Rear Differential


indicates a fuel pump problem as that is the only thing in that area that is ignition controlled or possibly the EVAP system solenoid/ valve if it is in that area
the frequency will be constant as the pump rpm is constant
the noise could be a venting noise from the EVAP in in that area
the distance of 15 km indicates that the problem is heat related as it take that long for something to over heat and cause the noise
you may get an indicator by running the fault code

Dec 02, 2017 | 2001 Mercedes-Benz C-Class

1 Answer

Engine has constant miss


cud be worn timing chain--or failin ignition module/bad coil---wires wear inside and look good out--same as distributer cap-------fuel pressur and injectors may hav issue

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1 Answer

Engine starts,reaches high rpm,then slowly returns to a rough idle, misses badly,no backfire,surges as if searching/adjusting air/ fuel/est,timing light shows mark constantly changing/erratic,engine then...


Vacuum leaks. Check all hoses and intake bolts. Leaking EGR or plugged PCV valve. Air filter plugged. Leaking head gasket. Worn timing chain. Camshaft lobes worn. Valves burned or leaking. Fuel idle control system or sensor. Good luck!

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2 Answers

1991 300e 6cyl


Replace front drive belts. There comes a time when they get so worn and polished that they just don't grip anymore.

Cheers John

Dec 19, 2008 | 1991 Mercedes-Benz E-Class

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