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Investigated a no-start condition caused by electrical interference in the crank sensor signal during cranking. Cleaning the block and bellhousing mating surfaces and threads resolved the issue.
Plan
Gallery
Decisions & Unknowns
What needed to be figured out:
•
Determine why the crank sensor signal became noisy only while the starter was running.
Tasks
What needed to be done:
•
Check the starter, battery cables, grounds, crank sensor signal and engine-management wiring
•
Clean the block and bellhousing mating surfaces and chase the threads.
•
Confirm clean crank-sensor signal and restart the engine.
