I just installed a autometer fuel gauge and ran all new wiring all the way back to the sender. Gauge goes all the way to full and pass and just stays there. any ideas? Thank you

Do you have the ground strap from the sender to the body fuel line?

What ohms range is the gauge made with?

did you do all this?
http://www.autometer.com/tech_faq_answer.aspx?sid=1&qid=39

It is 78-10ohms for chrysler and ford. Yes have ground strap on fuel line also ran a separate ground to the chassis. And yes I already did the autometer check list and troulble shooting. I am going to try and get another sending unit to test and see what happens.Thank you everyone very appreciated.

It sounds like it is shorted somewhere, a normal gas gauge will go to the pin on a short.

somewhere from the downstream terminal on the dash gas gauge back to the sending unit there's a dead short to ground & I'm assuming the present sending unit in the tank was OK/is untouched then the OE gas gauge went bad & was replaced w the correct aftermarket dash gas gauge now it pegs

The above 2 responses I would agree with. If you want to test a gauge you ground the lead at the tank and see if it pegs. I'm guessing short too.

yes. Gauge worked fine then have had some issues with the cluster so put a mechanical oil and temp and a electric fuel. So as far as I know the sender is good. Trying to get another to test before I pull mine out of the car.Just for the life of me cannot find the short. All wiring is new and have even ran jumper wires for each wire to see if one was a problem.

See if the voltage limiter is putting out ~5volts

Im having a similar problem. My gas guage didnt work due to a bad fuel sending unit. So I put in a replacement and it was working perfectly. The car sat for 2 wks while I was out of town, and now it jumps back and forth for a while, then it will go all the way over to full and stay there. Turn the car off and restart, it will do the same scenario again. Im going to check for a short somewhere, and if ones not found I will have the sending unit replaced under warranty.

Will be watching to see what happens with you as well, in case I need to look at my guage.

roe

Okay finally fixed it. The brand new wire I had run from the sender to the gauge was bad. Not sure how,it is brand new no cuts,kinks,or any signs of damage. Ran a new wire off the same spool and hooked it all up and it works. Thank you all for suggestions and time.

How far past full ? ..and it stays there ?? ...even when the float os down ?

I ran the new wire right along side the factory wire. It was tight but slide it through the grommet in the trunk. Now I am running a autometer gauge in a gauge cluster mounted on the bottom the dash. So I just ran the wire through all the factory wire looms and dropped it down. It was a pain but not undoable.The original problem with the autometer gauge install was it pegged all the way past full as soon as I hooked the sender wire to it.