drive through shallow surface water the revs drop

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plad86

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I bought a landrover discovery recently it is on an 02 plate 7 seater td5 [COLOR=green !important][COLOR=green !important]driving[/COLOR] through deep water does not seem to be a problem however if I drive through shallow surface water the revs drop and it almost stops on one occassion I lost steering and no brakes as if the [COLOR=green !important][COLOR=green !important]engine[/COLOR][/COLOR] had stralled although it righted itself within 20 seconds the vehicle is automatic, it has been in the garage where I purchased it from for two weeks and they cannot find the fault although it did this again with the mechanic driving it . I would add that the garage is a very reputable one Would appreciate any help plad86

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plad86 said:
I bought a landrover discovery recently it is on an 02 plate 7 seater td5 [COLOR=green !important][COLOR=green !important]driving[/color] through deep water does not seem to be a problem however if I drive through shallow surface water the revs drop and it almost stops on one occassion I lost steering and no brakes as if the [COLOR=green !important][COLOR=green !important]engine[/color][/color] had stralled although it righted itself within 20 seconds the vehicle is automatic, it has been in the garage where I purchased it from for two weeks and they cannot find the fault although it did this again with the mechanic driving it . I would add that the garage is a very reputable one Would appreciate any help plad86​



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Click to expand...

It's cos the fan belt slips when it gets spray on it.
 
If I go through the ford at back of our farm to quick, my Disco coughs and goes flat exactly as you describe.

I bet if you were to take the air box lid off,( after going through water ), you,d find you have a wet air filter and water in the bottom of the box !.

I went in a bit to deep/fast in a quarry last weekend and was lucky to have got away with it !. ( air box/filter as above ).

Del.
 
Shifty1962 said:
Fair point but he is talking about shallow surface water in the first post with no problems in deep water.
Click to expand...

I hear you Shifty, and the steering/brakes diagnosis is, I think, spot on.

He surely must have gone through the water quick enough to get it splashed all over the belts, so do you think that it could have made it up the wheel arch to the air intake ?.

I really dont want to go down the raised intake route, but I,ve got to watch me step in the water, and my filters get very clogged with dust in the dry months.

Del.
 
PASTMASTER said:
Why would a slipping fan belt cause the revs to drop?
Click to expand...


It doesn't.
What it does is allow the alternator pulley to slip on the drive belt and the alternator slows down smartly due to electrical drag.
The system takes pulses from the alternator to run the rev-counter, so if the alternator speed drops, so does the rev counter, even if the engine speed stays the same.
 
Could it be that the resistance that the water causes slows the vehicle down slightly needing more throttle to keep going at same speed as before entering the shallow water:)
 
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