Death of A Dwell Meter

[Jack]

So I had been running open loop for a few months. No O2 sensor.
I knew my mix was pretty close, adjusted by ear, nose and performance.
But I missed being able to tune the mix with a dwell.
So I had an O2 bung welded into the Special T Auto Stainless Exhaust System.
Went for a long drive and hooked up the dwell, reading was way off...
So I hit the WOT / Fuel Throttle Switch, 40%...
Turned of the car jumped the rely, sure enough still 40ish%
Took the meter inside, switch it to Volt and hooked it up to a 1.5 volt battery nothing.
So my meter has bit the dust.
Any ideas on what would kill a meter like that?

[WelmoedJ]

So I had been running open loop for a few months. No O2 sensor.
I knew my mix was pretty close, adjusted by ear, nose and performance.
But I missed being able to tune the mix with a dwell.
So I had an O2 bung welded into the Special T Auto Stainless Exhaust System.
Went for a long drive and hooked up the dwell, reading was way off...
So I hit the WOT / Fuel Throttle Switch, 40%...
Turned of the car jumped the rely, sure enough still 40ish%
Took the meter inside, switch it to Volt and hooked it up to a 1.5 volt battery nothing.
So my meter has bit the dust.
Any ideas on what would kill a meter like that?

Probably Bitsyncmaster may come up with better ideas.
If you open up the meter, you may find the bugger.
I had a (digital) meter that suddenly didn't show anything on the display.
First thought "battery", replaced to no avail (another meter proved it was OK).
Because 'outisde warranty period' I opened the unit and found many corrode soldering points.
After re-applying fresh solder and testing the unit works again.

In your case it also may be some bad soldering or defective components.
Another reason could be a Amp test outside the protected range and/or for too long a time.

[Bitsyncmaster]

If you read 40% (duty cycle) with the WOT switch pressed, your meter is connected backwards. Reverse the leads and it will read 60%.

[Jack]

If you read 40% (duty cycle) with the WOT switch pressed, your meter is connected backwards. Reverse the leads and it will read 60%.

I put the leads on how I always do? Green to Frequency valve wire and Black to ground.
I got a new dwell and it says 55ish went I hit the WOT old one still says 40 hook up same way.
I did try switching the connections before getting a new dwell meter, but it gave no reading?

[Bitsyncmaster]

I put the leads on how I always do? Green to Frequency valve wire and Black to ground.
I got a new dwell and it says 55ish went I hit the WOT old one still says 40 hook up same way.
I did try switching the connections before getting a new dwell meter, but it gave no reading?

OK. Does your new one read Dwell (degrees)? If so, I think 55 deg. is what you should get.