So my truck is running quite well on the new pcm now but theres one weird issue left. My speedometer does weird things only key on engine off. It likeises up and floats around in the 45 50 mph range and holding the brake lights on or turning the headlights on makes it move around somewhat sporadically and then slowly rise up some. You start the engine and it snaps down to zero no problem. Im confused
Also speedo functions normally while driving around. Its just key on engine off
Also i set minimum tps for PE to the max anc the minimum speed to the max and the minimum temperature to the max. It still comes on if i put my foot in it. Im also getting alot of knock counts and i think its stuck in high octane spark but i deffinatly have a fullass tank of 87. The highest at the pump in my state is only 90 as well.
anyone got any ideas on where to look in the bin?
Last edited by Rob 689; 09-26-2022 at 07:12 AM.
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