My son's temp gauge on his 85 240D has been erratic. I'm thinking a bad connection at the temp sender. Any other ideas?
Also his fuel consumption seems to be horrible as of yesterday. I thought maybe a sticking fuel sender which might show lots of fuel and suddenly take a dive when the tank empties. Any thoughts here? Who's been there?
Mike

Jumping temperature needle is either a bad ground or a bad sender (Located between the #2-3 cylinders on the head).

What is the actual MPG?

I don't know the milage because I don't drive it. I'll have my son do a fill, drive and refill and chart the stats. Thanks.

Check the wire connection at the block sensor, it may be broken or ready to break. Mine just did this, I had to resolder the connection, now no jumping. Keep notes on the mileage for fuel consumption, you will soon find out how far you can go. Good luck.

__________________
If it ain't broke take it apart and find out why.

1983 300SD, 4 speed
1994 C280
1987 300TD wagon
1996 HD Road King

Ride in Peace Eric Peterson, Harley of Macon

Another possibility is the engine to body ground strap.