Quote:
Originally Posted by FFPerformance
I'd have to disagree with you... spark plug basics 101, reading spark plugs.....
If you pull them and they are wet and black, then you are most likely too rich (possible oil consumption as well)
If you pull them and they are dry and white, then you are most likely too lean (as the original poster stated)
If you pull them and they are a 'toast' or tan color, then you are in the right area for an appropriate afr.
I would double check the wideband sensorys you're usuing to tune the SAFC and make sure that they are in working order. Perhaps cross check the wideband with one from a dyno? I can see how the safc could have been adjusting fuel based on what it thought was a rich reading, and causing a lean condition if the sensors are going out.... sometimes leaded fuel accelerates them wearing out too...
good luck!
$.02
|
Disagree all you want, it doesn't make you right. Also, it is difficult to really read a plug on a street car. To read a plug you need to shut the engine off immediately after a full throttle pull and then pull the plug, that is not really feasible on a street car. Also, it was never stated that the car had a wideband, so it likely doesn't. If you knew about DSM's, you would know that .035" gap is WAY too big and causes issues just like what was stated. DSM's are picky on the plug gap.
Threaded Mode