buzz-1989
New Member
- Joined
- Dec 28, 2014
- Messages
- 9
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- Location
- Kent - England
- Your Mercedes
- 2004 C220 Avantgarde CDI Auto
Hello everyone reading this, I'm new to the forum.
I have a 2004 C220 cdi auto. I've owned my car for about 10 weeks now and I have issues when the car is cold. It starts fine I let it run for a 3/4 minutes, then as I'm driving the car is hesitant especially at lower RPMs, if I put my foot down (I know it isn't a good idea when the car is cold) the hesitation goes away and the car pulls like a train, it seems like the fuel mixture is wrong when the engine is cold. At idle the RPMs fluctuate by about 100rpm, sometimes the RPMs are steady. This happens when cold or warm, its random. When the car reaches around 65-75 degrees C the hesitation disappears and the car drives as it should. I feel the MPG is a little low, on a 30 mile roundtrip (half motorway miles) I can only seem to average 37MPG. I'm by no means heavy footed.
I've replaced few things already that now I feel I shouldn't have bothered replacing but since I've already changed, I guess its eliminated any of those causing the problem.
So far I have checked and changed,
- Glow Plugs and soldered in a fuse into the Glow Plug Relay as one of the links had blown (still getting intermittent glow plug light showing while driving)
- Oil
- Oil Filter
- Air Filter
- Fuel filter
- Replaced a couple of fuel lines they had begun to crack around the clamps
- Auxiliary belt because it was badly cracked
- I've had the gearbox serviced including oil and filter change
- Thermostat and Engine Coolant Temperature Sensor
- MAF sensor
- I Cleaned the EGR valve which wasn't extremely dirty
I use Shell Diesel, I have put though 3 full tanks of Shell V-Power Diesel and no change in performance.
I have Checked as many pipes as I could reach for splits/cracks
I scanned the car with a Bluetooth scan tool and received an error on the throttle position sensor yet the throttle works fine (as far as I'm aware), I tried a plug in scan tool and received no errors whatsoever.
I really hope someone out there can point me in other directions as I've run out of ideas and would rather check possible causes myself than spending another £100+ on a STAR diagnostic although it is an option I'm a bit of a DIYer
-James
I have a 2004 C220 cdi auto. I've owned my car for about 10 weeks now and I have issues when the car is cold. It starts fine I let it run for a 3/4 minutes, then as I'm driving the car is hesitant especially at lower RPMs, if I put my foot down (I know it isn't a good idea when the car is cold) the hesitation goes away and the car pulls like a train, it seems like the fuel mixture is wrong when the engine is cold. At idle the RPMs fluctuate by about 100rpm, sometimes the RPMs are steady. This happens when cold or warm, its random. When the car reaches around 65-75 degrees C the hesitation disappears and the car drives as it should. I feel the MPG is a little low, on a 30 mile roundtrip (half motorway miles) I can only seem to average 37MPG. I'm by no means heavy footed.
I've replaced few things already that now I feel I shouldn't have bothered replacing but since I've already changed, I guess its eliminated any of those causing the problem.
So far I have checked and changed,
- Glow Plugs and soldered in a fuse into the Glow Plug Relay as one of the links had blown (still getting intermittent glow plug light showing while driving)
- Oil
- Oil Filter
- Air Filter
- Fuel filter
- Replaced a couple of fuel lines they had begun to crack around the clamps
- Auxiliary belt because it was badly cracked
- I've had the gearbox serviced including oil and filter change
- Thermostat and Engine Coolant Temperature Sensor
- MAF sensor
- I Cleaned the EGR valve which wasn't extremely dirty
I use Shell Diesel, I have put though 3 full tanks of Shell V-Power Diesel and no change in performance.
I have Checked as many pipes as I could reach for splits/cracks
I scanned the car with a Bluetooth scan tool and received an error on the throttle position sensor yet the throttle works fine (as far as I'm aware), I tried a plug in scan tool and received no errors whatsoever.
I really hope someone out there can point me in other directions as I've run out of ideas and would rather check possible causes myself than spending another £100+ on a STAR diagnostic although it is an option I'm a bit of a DIYer
-James
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