M-Class (W163) Produced 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

ML500 02 Stutter & Hunts light acceleration

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Old 12-16-2018, 12:03 AM
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2002 ML 500
ML500 02 Stutter & Hunts light acceleration

Hi Guys
Going nuts trying to figure this out - help!

Not throwing any specific CEL code wish it would

At any speed say 60 or 80 KPH , with a slight acceleration there is a second of two of stutter or hesitation not relay a miss as such, also under light load say a small incline again with light throttle it can fell like the engine hunts. Not directly related to fuel as I run lpg as well as gas an it is the same on both. Changed the MAF and Cam sensor, plug leads. Seems to be more apparent when engine hot Searched the threads but cant seem to find this sort of thing at speed, ok from standing start.
I will check all the codes I can to be sure.

Any Ideas???

ML500
w163
2002
320000km

Regards
Terry
Old 12-16-2018, 01:31 PM
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02w163ML500 / 97w210E50AMG / 99w202C230k / 95w124500e-wip
more reading
edit: maybe a throttle relearn?

could also be a small vacuum leak...
Attached Files
File Type: pdf
Throttle Relearn 2.pdf (17.1 KB, 96 views)

Last edited by khomer2; 12-16-2018 at 01:34 PM.
Old 12-18-2018, 05:41 AM
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2002 ML 500
Thanks
I think the relearn has helped heaps
I will check for vacume leaks as well
Old 12-28-2018, 08:22 PM
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2002 ML 500
Still happening but only when hot
Noticed temps sits around 80 but will rise to 95 over time and then the problem
going to change the thermostat

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