C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1990 base Knock Sensor symptoms? Or?

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Old May 26, 2017 | 08:22 AM
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Default 1990 base Knock Sensor symptoms? Or?

DUB has been helping me with poor idle, bad mpg and shut offs when coming to a stop. I am waiting on the delivery of a MT2500 "Red Brick" I bought off of ebay but in the meantime I found that the connector going to the knock sensor has a very poor connection.
What would be the symptoms of either the bad connection or a bad sensor all together? Anything related to my issues?

Any other suggestions to check while I wait on the MT2500??

Already
  • Checked codes. they show nothing but the check engine light is on.
  • Cleaned throttle body

Replaced:
  • injectors with Bosch rebuilt from FIC
  • Wires with MSD 8.5 mil's
  • plugs
  • MAP sensor
  • fuel pump
  • ICM
  • O2 sensor

I'm still checking for vacuum leaks with a mechanic stethoscope with vacuum line hooked to it for listening for a leak. but found none yet.

I may have left something out that I have replaced or tried! There has been so much!!!

BTW, DUB is an awesome guy! Extremely knowledgeable and willing to help!!

Thanks!
Wade
Old May 27, 2017 | 08:17 AM
  #2  
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Had an older Pontiac v6. The knock sensor wire came off and engine ran like crap. I think if the ecm doesn't recognize, it will retard timing 20° and run like crap. Look at timing
Old Jun 6, 2024 | 07:24 AM
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