Autometer A/F Light show help

[race94]

My son bought me a Autometer A/F gauge PN#5775 . Hooked this thing up just like the instruction sheet showed,used the red/black wire for signal,used the hot wire(key on)from the discarded clock harnes & a common ground wire. The gauge only shows 1 green light(last one on the rich side is the only 1 that lights up) drove the car for 20 miles and it still only showed that 1 green light .So I think maybe i got a bad gauge ,checked with a voltmeter and i have a fluctuating voltage on the purple wire(signal wire),so the gauge should be reading something--right?. Emailed autometer but haven't heard any response from them so thought i would ask here to see if anyone had this kind of problem before and what do you think the culprit could be.TIA

 

[JJ95GTID]

Did you check to make sure you are getting 12v between red and black? I have the Summit gauge and it works fine but is pretty useless other than to watch the stock EEC trying to keep 14.7:1 a/f ratio. All it seems to do is bounce back and forth between lean and rich.

 

[HISSIN50]

I agree with Joe. Also, ensure the signal wire connection at the gauge is really secure (if you didnt use this location for your meter testing).

The gauge should start bouncing around within about 30 seconds of when you start the car.

Good luck.

EDIT: OT. Joe, there's a guy in 5.0 Tech lookin for help in Boise - on the off chance you're interested in wasting time and frustrating yourself workin on someone else's car. I actually thought you might just have some advice on where to take the car in or something like that. The guys sounds like he's ready to torch it.

http://forums.stangnet.com/showthread.php?t=711982&highlight=Boise

 

[race94]

well i feel like an idiot . seems like i didn't have a good connection at the gauge. was getting my readings from the splice at the pcm,checked the connection at the gauge and that is where the problem was. THANKS for the help. Eddie

 

[HISSIN50]

NIce when it's an easy and cheap fix.

Good advice from Joe and nice work Eddie.

 

[Dino Dino Bambino]

I have the Summit gauge and it works fine but is pretty useless other than to watch the stock EEC trying to keep 14.7:1 a/f ratio. All it seems to do is bounce back and forth between lean and rich.

At least that tells you that the O2 sensor's working properly so it's not completely useless.