Wideband Faisalfe reading RPM | AEM
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Yuzepe
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Last seen: 5 years 10 months ago
Joined: 09/01/2014 - 11:23
Wideband Faisalfe reading RPM

hello, how are you? yeremi my name is, I'm from Argentina, I have an armed renault 21 turbo, carburetor and conventional ignition. I have the aem wideband failsafe and when connected to the computer does not read me the RPM. may be some incompatibility between the type of power and wideband? 

thank you very much 

Greetings

rfugate2002
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Last seen: 5 years 9 months ago
Joined: 08/31/2014 - 19:45
Its a problem I've been

Its a problem I've been trying to get fixed for almost a year. And if you call in and ask what is wrong they act like they've never heard of it not working before. Some say you cant use the coil wire for the rpm's that you should tap into a fuel injector wire and set it to 0.5 But i've already tried it and nothing worked.

AEM_NS
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Last seen: 30 min 37 sec ago
Joined: 06/06/2014 - 09:31
The wideband failsafe needs a

The wideband failsafe needs a fairly clean square wave input in order to pickup an rpm signal correctly.  Unfortunately picking up off of the coil primary doesn't usually give you a very good square wave.  In cases where a good, clean square isn't easily found, we suggest some type of tach adapter.  

rfugate2002
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Last seen: 5 years 9 months ago
Joined: 08/31/2014 - 19:45
So I bought the crane hi-6r

So I bought the crane hi-6r ignition box and hooked the rpm wire from the box to the gauge. And still nothing... Crane is telling me that it is infact a square wave signal.. I've been trying to get this rpm to work on this gauge for over a year now. my next step is to return it...

 

AEM_NS
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Last seen: 30 min 37 sec ago
Joined: 06/06/2014 - 09:31
You must be the same

You must be the same gentleman that called in and talked to one of our tech guys.  Have you verified the signal with an oscilloscope?  I've personally installed a WBFS on aircooled VW with a full MSD CDI ignition.  I tapped onto the tach output signal from the 6AL box and it has always worked flawlessly.  The tech support rep mentioned that you've gone through 4 gauges and just keep sending them back to where you bought them.  There's a chance those other gauges were damaged when they were connected to things like the coil primary and injector signals.  Hopefully the unit you have now isn't damaged but if it was, it might explain why it doesn't read the tach signal from the ignition box.