Alright ive been struggling with this code (P1512 - Intake Manifold Runner Control Bank 1 Stuck Closed) for over a week. Theres not much on any Miata forum related to this issue.
I have no clue what to do next aside from replacing parts (that appear to be working fine) so before I do that I figured I should ask some of you experts.
Car is a 2001, engine was replaced and has around 120k on it. I bought it 2 weeks ago, and am starting to question how good of a deal i got.
So far I have :
~Checked all vacuum lines going to the VVT solenoid (all of them coming from the back of the intake) and they all appear good
~Connected a high end scan tool to my ECM and manually activated the VVT solenoid (which I could hear clicking)
~Seperated the top half from the bottom half of the intake manifold and checked to see if the rod the VVT solenoid turns would move, and it does
~Tested the signal wire from the VVT solenoid to the ECM and the wire appears good
Im thinking about replacing all the vacuum lines just to rule them out completely. Then the VVT solenoid.
Could my ECM be bad? From searching about replacing the ECM, can I reprogram it or do I have to take it to a shop?
Are my check valves facing the correct direction?
Anything look wrong? Aside from the purple valve cover...