Poor running (limp mode?!?) - 3.9 Rover V8

DaveEFI · Post by **DaveEFI** » Thu Mar 24, 2011 9:46 am

welshphill wrote:can you help me, i have a VERY simular problem on my 95, 3.9 v8 discovery...

what do you mean when you use the term throttle POT???

is it the throttle position sensor???

many thanks

Yes - the TPS is a potentiometer. They wear out eventually.

welshphill · Post by **welshphill** » Thu Mar 24, 2011 12:18 pm

thank you....

thats next on my list to change!!!!

DaveEFI · Post by **DaveEFI** » Thu Mar 24, 2011 2:58 pm

welshphill wrote:thank you....

thats next on my list to change!!!!

They can be checked quite easily - with a DVM. Look for a smooth increase in output volts as the throttle is opened very slowly. Wear on the track will cause an erratic reading - usually towards the idle position, as that gets the most use. It also needs checking/setting to the correct voltage output at idle.

welshphill · Post by **welshphill** » Thu Mar 24, 2011 8:06 pm

thanks for the replies and help...

turned out that the TPS was causing my bother