would this be an issue with a nelson made harness? and a manual tranny?Quote:
Originally Posted by beater6.0
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would this be an issue with a nelson made harness? and a manual tranny?Quote:
Originally Posted by beater6.0
i think it is in my pcm, im saving some money right now to get a nelson tune done
I'll be picking up the tach adapter tomorrow. I'll also install it tomorrow. Beater6.0 I'll let you know if it works or not.
I don't think it's the harness but if the resolution is off one way or another it can affect the output.
FWIW, I have a 2002 5.3L tuned by Nelson in a 92 fullsize.
It has an AutoMeter tach wired as described in the initial post that works well, I have it in 4 cylinder mode.
I guess there must be differences in pcm
Hmmm. That's weird. Well, the Technical Support Supervisor at Auto Meter wanted to know specifically what year vehicle the engine was out of. Well, I'll know for sure if it worked by late tomorrow. Thanks.
Let us know when you find something out.
I also have a harlan shift light hooked up, and it is exactly the same as the tach.
The two are in unison also as the light comes on as soon as the tach hits 6500.
i think my problem is the pcm, hope fully i can get a nelson tune in the next week or two and if that aint the problem im burning the truck down
Well, the Auto Meter 9117 tach adapter did work, but not in the way I thought. It thought it would take the 5V output of the PCM and convert it to a 12V output that the tach could read. Instead the tach adapter is installed in-line with the power supplying voltage to the ignition coils. It basically reads the current going through that line and supplies the needed 12V square wave signal that the tach is looking for. Does it work? Yes, but the needle on the tach is a little fluttery. Other than that it's fine.
glad it works i would like mine to work from the pcm. bu tglad yours is working