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Our Flood Totaled ZR-1 Won’t Stop Smoking, Overheating, and Dying. After figuring out its fuel issues, we resolve our Exhaust Issues once and For All with a Made in the USA @STAINLESSWORKSNET Full Exhaust System

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26 thoughts on “Restoring my Salvage Corvette ZR1’s Flood Destroyed Engine Components”
  1. Hey Sam, I have repaired many of these C4 corvettes and the most common issue is the two engine temperature sensors, One runs the fan control and the other runs the ECU feedback. Both are usually bad and may have been switched with generic sensors, only use NTK or the original GM sensors as the others do not report correctly and are critical for engine performance. The initial overheat is usually due to the electric fans not operating or the relay for the fan controller being bad (Drivers side engine compartment in front of the battery). GM did not tie the two temp sensors together in the ECU and they both run independently of each other. the next one is to check the fan/fans (some have two others have one) for operation by manually powering them up. The ECU temp sensors when bad will give you hard starting, especially when the engine is hot and a lack of power is another symptom as it can not control the fuel content correctly. This is due to reading the engine temperature incorrectly (Usually creates heavy smoke due to running to rich once hot). last but not least is the fuel injectors. they are prone to fail on these and will take down more then one cylinder or just will not provide enough fuel. And yes I do run and own my own shop if you did not already guess.
    Hope this helps with the diagnostics a little.

  2. Kust because those exhaust tips are period, doesn't make them cool. They look terrible IMO. Just fit four separate tips man! Great work, can't wait to see you actually clean the damn car up! It annoys me how you leave even the lot scribbles on the windscreen!

  3. Two comments. First, it is important to torque the knock sensor to the correct value. Back in the day the service manuals used to warn about this. It is a type of microphone so too much or too little torque can change its sensitivity. Second, I would really work on getting a scan tool that works with GM OBD-I. There must be a few out there. You really need the full display of values to see what's going on with the engine.

  4. i'm going through my own C4, but its a 96 LT1. Its not a cakewalk, but its going along. its a journey but its worth it. keep them on the road. especally ZR1s.

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