Hi,
New to this forum and hoping to find an answer to some annoying issues with my recently purchased 99 ML430 with 63,000mls on it.
Seems to be very temperamental with regards to acceleration and shifting.
I drive 11 miles each way to work in it everyday, some mornings I can hit the accelerator from the lights and leave everything in my mirror. Pulls really strong, all the way to 6000rpm where it will shift and keep pulling like a train.
Yesterday I was left behind by a woman in a Vauxhall Meriva, it accelerated very slowly and seemed to have no power and sat at 6000rpm until eventually it shifted 2 gears but had almost no throttle response (even less than it normally has !!) Today, pulling away from the lights it suddenly died at 4000rpm then came back then died etc. Up to 4000rpm seems sluggish but ok so when I got to work I opened the hood and tried revving it up.
Sure enough it cuts out at 4000rpm but nothing happens for the first say 20%of accelerator pedal travel ,then the engine will suddenly play catch up. There is a really big lag. MPG seems to have dropped too, especially on the motorway, where I got 23mpg indicated at 65 now I am showing 17mpg.
Plugs and fuel filter were replaced at 50000mls according to service book, I cleaned air filter and did oil change with Mobil 1 recently.
Sorry for the long winded post but as an aircraft engineer I've found the more info u can give with faults the easier the diagnosis.
Thanks for any pointers or info
(just read post saying E240 cuts out @4000rpm to protect engine in neutral, is that the same with ML? )
New to this forum and hoping to find an answer to some annoying issues with my recently purchased 99 ML430 with 63,000mls on it.
Seems to be very temperamental with regards to acceleration and shifting.
I drive 11 miles each way to work in it everyday, some mornings I can hit the accelerator from the lights and leave everything in my mirror. Pulls really strong, all the way to 6000rpm where it will shift and keep pulling like a train.
Yesterday I was left behind by a woman in a Vauxhall Meriva, it accelerated very slowly and seemed to have no power and sat at 6000rpm until eventually it shifted 2 gears but had almost no throttle response (even less than it normally has !!) Today, pulling away from the lights it suddenly died at 4000rpm then came back then died etc. Up to 4000rpm seems sluggish but ok so when I got to work I opened the hood and tried revving it up.
Sure enough it cuts out at 4000rpm but nothing happens for the first say 20%of accelerator pedal travel ,then the engine will suddenly play catch up. There is a really big lag. MPG seems to have dropped too, especially on the motorway, where I got 23mpg indicated at 65 now I am showing 17mpg.
Plugs and fuel filter were replaced at 50000mls according to service book, I cleaned air filter and did oil change with Mobil 1 recently.
Sorry for the long winded post but as an aircraft engineer I've found the more info u can give with faults the easier the diagnosis.
Thanks for any pointers or info
(just read post saying E240 cuts out @4000rpm to protect engine in neutral, is that the same with ML? )
