Recommendations for Codes...

[Shonoff93]

My 93 MTX bucks and sputters randomly. I would tend to believe it would be the CID or CPS. I have replaced both of these parts before and am now experiencing similar problems.

Here are the codes I pulled both KOEO and KOER:

551 Problem in Intake Manifold Runner Control (IMRC) solenoid/circuit - Solenoids
211 (M) Ignition PIP signal was erratic or missing - Ignition Systems
214 (M) Error in Cylinder ID (CID) circuit or signal - Ignition Systems
528 (M) System shows voltage at pin 10 (is A/C on ?) or pin 30 (PNP, CPP switch) - PNP
538 (R) System did not receive "goose" test

Any recommendations of where to start with these codes? And could a bad ground be an issue?

Thanks