D90 TD5 Issue - Help Please

So i have a 90 TD5 V-REG and it doesnt seem to reach over 55mph and revs really high in low gears, its in High on the Diff? surely it goes much faster ive heard someone say it could be something to do with the accelerator anyone know exactly what it is because it needs to be sorted?

Thankyou in advanced fo your help

-Jay

Well, if it's revving really high, change up! They're electronically limited to a max of 4,800 rpm or so, as I remember, so in theory it can't get terribly high. They're very leisurely in their acceleration after around 50 mph - not exactly a good overtaking car - so be patient. You don't say how long you've driven it flat out, but unless you've got a very long straight you don't see the top speed. Any warning lights? Little yellow picture of an engine lighting up anywhere on the dash? Is it limiting itself because the ECU has detected a fault? Usually it might benefit from a service - get some new filters and fluids in there and check that there's enough air and fuel finding its way through. Then see if there are any fault codes showing - find someone with diagnostic kit or take to a garage if you haven't got one yourself. If it's able to rev right through the full range I'd suspect it's not the accelerator potentiometer (or 'driver demand' as it's sometimes called) itself that's faulty, but something to do with what the ECU does with the information.

Has it always done this.
Are you the new owner.
rember its not a car.
Is it cluth slip,

thankyou everyone, and yeah im a new owner and my old 1997 90 never did any of this, would reach 70 easily

Believe me it will do more than 55 or your old 97 300tdi. There is an issue if there is no warning lights. If you dont know what your doing then take it to a diagnostic centre.

if you are shaw its not cluch slip and it revs out to quick it is down to gear ratio, diffs , tyres ,transferbox

JayDefenderTD5 said:

So i have a 90 TD5 V-REG and it doesnt seem to reach over 55mph and revs really high in low gears, its in High on the Diff? surely it goes much faster ive heard someone say it could be something to do with the accelerator anyone know exactly what it is because it needs to be sorted?

Thankyou in advanced fo your help

-Jay

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Have you tried shifting the transfer lever to the low position just to be sure?

ratty said:

Have you tried shifting the transfer lever to the low position just to be sure?

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good piont