ok my brother in law just bought this car an left it with me will he is in afganastan an were ever he got it they put a 130 amp alternater on it an they keep gong out after about a week what would cause this

o yea it is a 1989 lx 5.0 thanx alot

 

Do you mean it's burning up? Have you taken the alternator to the parts store to have it tested? I think we need more info about what's happening before we find an answer. The 89 is supposed to have a 75 amp alt - why the 130?

 

yea they quit charging ,i guess they put it on because of the upgraded electronics
its got a electric fuel pump an electric fans now ,i was wondering is there somthing u have to change to run the bigger alternater as far as wiring

 

Well, could be a lot of things - if the week old alternator checks bad at Auto Zone, return it and try another one. If you can't return it, you might be able to replace just the voltage regulator part (not sure which alt you've got, but the volt reg is probably built into the alternator). If it fries again you'll have to dig deeper than we can do here on the forum because something in the system is frying the voltage regulator.

If the alternator checks out okay at Auto Zone... re-install it and...
1. Check belt tension.
2. Make sure the battery connections are clean and tight.
3. Make sure all connections to the alternator are seated properly.
4. Check the ALT fuse in the fuse box (not sure where or even if the Fox bodies have one
5. Make sure alternator mounting bolts are tight and torqued to spec.
6. Run the engine and make sure the alternator is not making any bad noises and make sure the pulley is not slipping.

That should get you started to finding the problem.

Check out this article on the 75 to 130 amp alt swap to make sure the previous owner didn't mess it up - it's from 5.0 magazine.

Good Luck!

Steve