Does anyone know if a Snap-on scan tool can accurately read the following: spark timing, A/F ratio, knock retard, and engine load while using nitrous? I have afriend thats a mechanic and he said he'd scan my truck to make sure its not leaning out or detonating while on the juice. Thanks in advance.

 

i was using a modus scanner about a yr ago unplugged an O2 sensor it took about 54secs to show on the osicallisope that it was unplugged? hope that helps

 

I don't see how it could read the a/f ratio seeing as how we have narrow band o2 sensors. You would either have to remove a stock o2 sensor and put in a wideband or weld on a new bung.

 

Thanks forthe help. I guess I'll resort to reading the plugs to make sure.

 

To get accurate info you need a wideband and data logger.

 

why dont u look at scangauge it does it all but a/f

 

The modis I have came with the 5-gas attachment you put in your tailpipe just like the widebands at the dynos. Thats how we get my a/f spot on before we go to the dyno and get it dead on.

 

Thanks for the advice, I just read the plugsthis morning and they looked ok. No melted electrodes or silver specks. A little rich, but thats due to low bottle pressure.