Electronic Control Module

[Archive]

Has anyone had problems with this module? My fuel pump began transfering into the oil at a tremendous rate today. Upon removal from engine it is obvious that the front seal is the reason. My next question was what caused the internal pump pressure to be this great suddenly? I was wondering if the KSB valve didn't do its job therefore pressure rose dramatically. I turned the key to run position and checked for power to the KSB and discovered none. Ambient temp. was high enough that there should have been. Seems to me that the control module is not energizing the KSB when it should. I was wondering how troublesome these modules are. The thermister seems to test out OK. All other functions of the control module appear to be operating properly. Thanks in advance.

 

[Archive]

I don't think the KSB the root cause of the problem. By the way, there are two designs of the KSB, the wax motor style (early series), and the solenoid actuated (later series). Sounds like you have the later... .
the KSB diverted fuel pressure rise is internally relieved, and should not cause case or seal ruptures.
What year is your truck, and the miles?


[This message has been edited by old school (edited 08-19-2000). ]

 

[Archive]

My KSB is the earlier (wax style). My truck is an 89. According to what I have read this KSB controls internal pump pressure. The way I understand it is that without power to heat the wax,that this will prevent venting of the pump causing internal pump pressure to increase significantly. I was wondering if this could possibly be the what happened as I mentioned with the key in the run position there is no power being supplied to the wire at the KSB.