andyrag Posted August 7, 2008 Share Posted August 7, 2008 Hello all, I am new to this forum... I own a Defender 110 Td5, it went in for a service (just normal oil changes etc and the viscous fan unit was replaced). Since I got it back, I have noticed the vehicle over-revs when the clutch is engaged. If I allow a second or two between the accelerator being relased and the clutch being engaged, it isn't as pronounced (or doesn't seem to do it at all). The only other thing wrong with the vehicle is the fuel pump, which I have been told needs replacing as it is on its way out. The master cylinder was checked and was ok and the seals replaced. Nothing was done to the clutch (not even the fluid replaced) - allegedly - during the service Thanks in advance! Andy Quote Link to comment Share on other sites More sharing options...
101sean Posted August 7, 2008 Share Posted August 7, 2008 The over-revving could be the switch on the clutch pedal, check the wires to it weren't disturbed if they checked the clutch fluid. The switch tells the ecu when the clutch is dis-engaged. How do they know the fuel pump is on it's way, is it noisy? Quote Link to comment Share on other sites More sharing options...
watson Posted August 7, 2008 Share Posted August 7, 2008 to me it sounds as if your clutch is slipping, does it rev to high pulling off and does it feel slugish to pull off (yes i know it is a land rover) josh Quote Link to comment Share on other sites More sharing options...
Lara Posted August 7, 2008 Share Posted August 7, 2008 Easy way to check clutch slip as follows. Drive car at about 30mph in 5th gear, Give full throttle and wait for car to slowly accelerate, Dip the clutch to raise revs to say 3500rpm, Then "drop the clutch" ie, take foot of as fast as possible while still keeping other foot on full throttle, The engine should immediately "bog" to regain the same revs as before you pressed the clutch, There should be almost zero slip. Any slip from the clutch will show it as being faulty and on it's way out. Lara. Quote Link to comment Share on other sites More sharing options...
ozzie1989 Posted August 7, 2008 Share Posted August 7, 2008 No, I don't think it's clutch slip as it happens when he's dipped the clutch... the engine revs by itself so to speak. Again, check the clutch switch. Anyone with a Nanocom will be able to tell you if its working properly Quote Link to comment Share on other sites More sharing options...
andyrag Posted August 7, 2008 Author Share Posted August 7, 2008 How do I check the clutch switch? sorry for my ignorance. yes the fuel pump is noisy, and has become progressively noisier (sometimes the noise varies as well, not just a constant whine) The over-revving could be the switch on the clutch pedal, check the wires to it weren't disturbed if they checked the clutch fluid. The switch tells the ecu when the clutch is dis-engaged.How do they know the fuel pump is on it's way, is it noisy? Quote Link to comment Share on other sites More sharing options...
BogMonster Posted August 7, 2008 Share Posted August 7, 2008 Yes as said it is the clutch switch. Easy way to tell is disconnect it (just pull the connector off the switch) for a while and see if the problem goes away! Quote Link to comment Share on other sites More sharing options...
andyrag Posted August 7, 2008 Author Share Posted August 7, 2008 Excuse my utter ignorance but which is the switches? (red or yellow arrow on attachment? ) The engine seems to be overfilled with oil (about 8mm above upper notch on dipstick).... could this cause over-revving? Quote Link to comment Share on other sites More sharing options...
BogMonster Posted August 7, 2008 Share Posted August 7, 2008 It is the one you have got the yellow arrow pointing at. Unplug it and see what happens... Quote Link to comment Share on other sites More sharing options...
GBMUD Posted August 7, 2008 Share Posted August 7, 2008 Yellow arrow. Chris Too slow. Quote Link to comment Share on other sites More sharing options...
MJIbex Posted August 7, 2008 Share Posted August 7, 2008 Excuse my utter ignorance but which is the switches? (red or yellow arrow on attachment? )The engine seems to be overfilled with oil (about 8mm above upper notch on dipstick).... could this cause over-revving? The oil overfill will not be the cause. I bet on the clutch switch too. Mark. Quote Link to comment Share on other sites More sharing options...
Escape Posted August 9, 2008 Share Posted August 9, 2008 Overfilling with oil is no good either, it can lead to pressure build-up and then oil-leaks. If oil got into the air intake (usually via the turbo), the result is an engine running on oil instead of diesel and not responding to the throttle being released because it is (partly) fueled by oil. Quote Link to comment Share on other sites More sharing options...
andyrag Posted August 9, 2008 Author Share Posted August 9, 2008 Overfilling with oil is no good either, it can lead to pressure build-up and then oil-leaks.If oil got into the air intake (usually via the turbo), the result is an engine running on oil instead of diesel and not responding to the throttle being released because it is (partly) fueled by oil. Oh dear. Will it be enough to drain the oil from the sump plug or is it more complicated than that if oil has got into the air intake? Quote Link to comment Share on other sites More sharing options...
BogMonster Posted August 9, 2008 Share Posted August 9, 2008 I would not worry about that until you have checked the clutch switch. 8mm too high on the dipstick is nothing anyway, I have seen engines with oil anywhere between 50-80mm too high on the dipstick (usually caused by being filled by a dipstick!) and they suffered no problems though at that level you would definitely want to drain some out. I wouldn't even bother draining it out just keep an eye on it to make sure it isn't getting any higher, which would mean you are losing diesel into the oil from the fuel rail in the head which would be inconvenient and bl**dy expensive. Quote Link to comment Share on other sites More sharing options...
andyrag Posted August 19, 2008 Author Share Posted August 19, 2008 It was the clutch switch, unplugged it and its fine... I'm in Africa and the part isn't available locally so it'll be a while until I can get hold of a replacement... I'm not doing any harm driving it with it unplugged am I? Many thanks to you all Quote Link to comment Share on other sites More sharing options...
Aragorn Posted August 19, 2008 Share Posted August 19, 2008 its probably related to the anti-stall feature, i guess that simply wont work with the switch unplugged. Quote Link to comment Share on other sites More sharing options...
BogMonster Posted August 19, 2008 Share Posted August 19, 2008 No you won't damage anything with it unplugged. One of our vehicles at work has been like that for about 5 years now Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted August 19, 2008 Share Posted August 19, 2008 I unplugged it on my old Td5 110 as the anti stall got on my t!ts a lot! i did 144,000 miles with it disconnected, no problem at all... in fact, it was nice to have the old "clunky" LR transmission back! LOL! Quote Link to comment Share on other sites More sharing options...
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