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Thread: Coolant temp reads high.

  1. #11

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    FWIW, my Delco sensor reads dead on when cold, but a bit low when hot, so neither are perfect. I figured I'd rather have the CTS be accurate when cold for cold start settings and just not worry about the hot stuff. My enrichment stops at 120°F, so the difference between a 165°F CTS reading when the mechanical gauge says 173°F doesn't affect anything.
    69 Camaro
    400 SBC, ProCharger D1SC
    1.302 60', 5.95@116.4 on pump gas

  2. #12

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    Yes, I’ve seen the long thread as I mentioned in my original post. But the last post in that thread was from maybe a year ago, well before my Stealth 4150 was available. Unfortunately it’s still an issue, and this confirms it’s the same problem/solution. Hopefully this helps others know it still is something to pay attention to.

    This should be a sticky in my opinion. Not only would that help newer owners like me, but then maybe Holley would preemptively fix this instead of making the end user deal with it. It’s just a little disappointing; as I’m sure they’re aware of it.

  3. #13

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    Quote Originally Posted by gregs69rs View Post
    FWIW, my Delco sensor reads dead on when cold, but a bit low when hot, so neither are perfect. I figured I'd rather have the CTS be accurate when cold for cold start settings and just not worry about the hot stuff. My enrichment stops at 120°F, so the difference between a 165°F CTS reading when the mechanical gauge says 173°F doesn't affect anything.
    I’m going to hopefully do some driving this week, so I’ll see. I’d also prefer the cold temperature to be right. Mine seemed to be off on both ends before. Cold looked spot on this morning.

  4. #14

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    I can't believe this is still an issue, even with the new Stealth units. This problem gets posted here regularly, I see it all the time in the "Holley Sniper EFI Owners and Tech" Facebook group, which I know Holley employees monitor and participate in. I've emailed Holley tech support (and I'm sure many others have) reporting this issue. They know about it, they're just choosing not to address it for whatever reason. I've had a great experience with my Sniper and HyperSpark hardware, but I have to admit this is questioning my confidence in Holley a bit.

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