Re: Crusty Rusty Leaky Squeaky 67 Step
Vic:
This is could be more than a simple ground issue. With Key On Engine Off (KOEO), the VSS should be a flat line on your oscilloscope. With Key On Engine Running (KOER), the VSS should still be flat line until put into gear and speeding up should begin to show a frequency change.
Checking the grounds is certainly not going to hurt... The Flashing Check Engine Lamp while the engine is running is a good indicator of a bad/missing ground somewhere. Are you using a NEW TCM? GM TCM's require programing/software download to function correctly, as they are BLANK (no software) out of the box. You may want to consult a local professional who deals in this sort of thing who can do a software load for your TCM.
Just pointing you in a new direction... hope it helps.
Abe
Last edited by Aberdare; 03-09-2018 at 09:23 PM.
Reason: Added a question
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