defenderdog

Active Member
Hi all. I noticed today when I buried the throttle on my Discovery 2 that it jerks about and stutters. Any ideas what this could be.
 
I’ve changed the loom and cleaned the plug so I’ll try a fuel filter. Would this only cause problems at high revs?
Mine was doing similar, drove fine around town up to around 30mph but started juddering at anything above it and struggled to go any faster. Turned out to be fuel pump. Turn ignition to position 2 and listen for it priming. Mine was dead.
 
Been there done that I hope for u,
Checked fuel filter, wasn’t that
Checked fuel pump was that
Checked voltage of fuel pump, wasn’t there.
We made a bypass from 12v accessory point in the back of the car, should replace it someday :)

Hope u find it!
 
1. What year and transmission?
2. EGR bypassed?
It’s an auto on a 2003. This only happens if if bury the throttle to the floor. Like to try and get it to kick down. It will rev right through to say 4-5 k no problems but bury the accelerator and it jerks all over the place. :eek:
 
Mine was doing similar, drove fine around town up to around 30mph but started juddering at anything above it and struggled to go any faster. Turned out to be fuel pump. Turn ignition to position 2 and listen for it priming. Mine was dead.
Thank you for your answer but I’ve changed the pump. Still the same. :mad:
 
Been there done that I hope for u,
Checked fuel filter, wasn’t that
Checked fuel pump was that
Checked voltage of fuel pump, wasn’t there.
We made a bypass from 12v accessory point in the back of the car, should replace it someday :)

Hope u find it!
Cheers mate. Me too. :(
 
I will still try fuel filter but seems strange it’s when you floor it only.
Well it can only be fuel or air related, have you replaced the MAF at all? Try running with it unplugged. If it improves, that's the problem. Other than that, maybe fuel pressure regulator?
It could be fuel filter though, if it's clogged, it will choke fuel supply at higher revs, very cheap and well worth trying.
 
It’s an auto on a 2003. This only happens if if bury the throttle to the floor. Like to try and get it to kick down. It will rev right through to say 4-5 k no problems but bury the accelerator and it jerks all over the place. :eek:
Seems like MAF cut-out, try with it unplugged and if it's OK we'll speak then
 
Well it can only be fuel or air related, have you replaced the MAF at all? Try running with it unplugged. If it improves, that's the problem. Other than that, maybe fuel pressure regulator?
It could be fuel filter though, if it's clogged, it will choke fuel supply at higher revs, very cheap and well worth trying.
I’ll give it a go. I’m away at the minute but I’ll try it all Monday. Thanks
 
Wastegate actuator or modulator on a d2... bit as mentioned maf sensor it’s most likely that, if you’re planning to keep her use genuine in a LR box, not vdo
 

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