Speedo acting up, and engine running bad

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Author Message   BJ Turner (Wturner) Member Username: Wturner Post Number: 173 Registered: 02-2002 Posted on Thursday, February 27, 2003 - 01:41 am:    I just installed a new alternator, now I am seeing a problem that I have never seen before. The speedo will jump around and the engine seems to run bad, it wont idle very well. This does not happen all the time, but so far only the two times on the way to school since I installed the alt. Speed tranducer comes to mind, but I am not sure. Any input is great!!!   anon (Hywy61) New Member Username: Hywy61 Post Number: 6 Registered: 02-2003 Posted on Thursday, February 27, 2003 - 01:51 pm:    re-check the installation and made sure you don't have a bad alternator - what you are describing is ususally a symptom of a bad alternator   Robert Sublett (Rubisco98) Senior Member Username: Rubisco98 Post Number: 659 Registered: 04-2002 Posted on Thursday, February 27, 2003 - 02:14 pm:    BJ, I second what anon says. Also, I have heard of rebuilt alternators just not cutting it. I did replace mine with a rebuilt about 2 months ago and haven't had a problem yet, but after hearing stories of failing rebuilt alts on the Rover, and even of one catching fire, I'd go with a new one. If you did go with a new one, just double check everything, and also check the routing of your serpentine belt, that is an easy one to screw up and an easy fix as well.. Later..   Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1057 Registered: 02-2002 Posted on Thursday, February 27, 2003 - 02:26 pm:    I second the belt routing!   BJ Turner (Wturner) Member Username: Wturner Post Number: 176 Registered: 02-2002 Posted on Thursday, February 27, 2003 - 08:41 pm:    Well the alternator is a brand new one, and when I removed the belt I tied it up so that the belt didn't come off any of the other pullies. Also the problem is not consistent. still seems like the speed transducer to me???? But if I knew I wouldn't be on this board, right!?!?!   Land Rover Certified Used A**hole (Jason) Senior Member Username: Jason Post Number: 299 Registered: 04-2002 Posted on Thursday, February 27, 2003 - 09:33 pm:    The VSS does sound likely...your speedo signal comes right off the VSS and the VSS also regulates the stepper motor/IAC which would give you the idle problems. There's a great write-up in the tech section.