ML 430 runs on choke and sucking gas like hell
Thread Starter
Newbie
Joined: Jan 2015
Posts: 9
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ML 430
ML 430 runs on choke and sucking gas like hell
Hi Guys ,
I have a 99 ml 430 from 7 years now . The car has 105 000 miles . I always maintain the car, probably that's the reason its looks and rides like new .
But I am not happy with a gas/mileage anymore . This vehicle gave me 18-20 mi/g in city and 20/23 highway . NOT ANYMORE. Something just happened !Now the most I can get( and its does not matter where I use it) is 14-16 mi/gallon . What I am noticing is when I start the car it runs on choke quiet longer than it use to ..(at least 1 minute long now ,and it was 20 sec before ) Also when the car runs on choke and I put it to gear its almost dies . But after the choke goes away and the rpm dropping the car runs smoothly without any issues .
I need an advice .If anyone could help please let me know what to clean or replace .
Here is the list what I just replaced since its happened: -new fuel filter , -new air filter , air mass sensor cleaned , new plugs , but nothing changed .
THANKS
I have a 99 ml 430 from 7 years now . The car has 105 000 miles . I always maintain the car, probably that's the reason its looks and rides like new .
But I am not happy with a gas/mileage anymore . This vehicle gave me 18-20 mi/g in city and 20/23 highway . NOT ANYMORE. Something just happened !Now the most I can get( and its does not matter where I use it) is 14-16 mi/gallon . What I am noticing is when I start the car it runs on choke quiet longer than it use to ..(at least 1 minute long now ,and it was 20 sec before ) Also when the car runs on choke and I put it to gear its almost dies . But after the choke goes away and the rpm dropping the car runs smoothly without any issues .
I need an advice .If anyone could help please let me know what to clean or replace .
Here is the list what I just replaced since its happened: -new fuel filter , -new air filter , air mass sensor cleaned , new plugs , but nothing changed .
THANKS
Junior Member
Joined: Dec 2014
Posts: 25
Likes: 2
From: Harrisburg PA
'02 ML500
I'm no authority on these Mercedes systems, but other fuel injected cars I've owned depended on a temperature sensor that worked as the "choke". The colder it gets this sensor tells the fuel injection system to feed more gas (fast idle) until it warms up. Sort of an "electronic choke". I assume this system depends on the same principle. If there is one on there, it could be this temp sensor not working properly.
