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

Cold start switch

Old May 20, 2024 | 09:45 PM
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Default Cold start switch

Does anyone know where to buy the cold start switch/sensor for cars with the 9th injector? The temp sensor on the front of the intake manifold. Not finding much as far as new units.



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Old May 22, 2024 | 03:55 PM
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Old May 22, 2024 | 04:15 PM
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Solar 88 I am not sure that is it for the cold start switch. The cold start switch connector is similar to if not the same as a fuel injector connector. The number for my 87 is 14084318. AC delco also made one. I am not guaranteeing these cross over but they were once listed but not longer listed by rock auto.

More Information for ACDELCO 212312{Alternate Inventory Numbers: 14084318, 19244930}

Some sellers of these will gouge your eyes out for pricing.
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Old May 22, 2024 | 04:24 PM
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Thats a temp sensor. The cold start switch has a square connector like the fuel injectors have.
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Old May 22, 2024 | 06:18 PM
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Originally Posted by Vets-Vet
Solar 88 I am not sure that is it for the cold start switch. The cold start switch connector is similar to if not the same as a fuel injector connector. The number for my 87 is 14084318. AC delco also made one. I am not guaranteeing these cross over but they were once listed but not longer listed by rock auto.

More Information for ACDELCO 212312{Alternate Inventory Numbers: 14084318, 19244930}

Some sellers of these will gouge your eyes out for pricing.
My bad, I forgot there’s 2 sensors on the front of the manifold and the one I listed was the one I replaced a few weeks ago and thought that’s what you needed. Yikes, you’re right about the prices private sellers are asking. I bought a new OEM IACV for my 1991 Nissan 240sx just a few years ago for $150 and now they’re going for over $1000. Greed isn’t good….
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Old May 23, 2024 | 08:59 AM
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Here's an part number interchange list for 14084318

Who knows, maybe one of them will turn something up for you.

Happy hunting!
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Old May 23, 2024 | 09:05 AM
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For newer models or well-maintained old cars, the dealership is usually the best place to start, especially if you need a specific part. They might not have it in stock, but they can order it from the manufacturer. For harder-to-find parts, like a cold start sensor for an older car with a 9th injector, specialty online stores can be helpful.
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Old May 23, 2024 | 11:39 AM
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Not what you’re asking for but…
https://www.corvetteforum.com/forums...post1552173762
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Old May 23, 2024 | 11:45 AM
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Originally Posted by stew86MCSS396
Not what you’re asking for but…
https://www.corvetteforum.com/forums...post1552173762
Ah..the ARAP bin..i used to run that one in my 88 Iroc back in the day..lol
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Old May 24, 2024 | 07:11 PM
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I've got a cold start valve and the temp switch for an early C4. Not sure what you need. PM me if interested. I'm in Reno/Sparks NV area.
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Old Dec 10, 2024 | 06:20 PM
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Ran across this. I can't confirm but it's probably worth checking. I see the switch on Ebay with prices across the board. Maybe it'll help someone on here.

"Not sure if this is a known fix but I figured this out. This is for anyone who has issues with their cold start injector and the thermal switch is bad and we all know the switch isn’t available or are stupid expensive if you can find one. I found this thermal switch used in older Toyota 22re engines. The connector is the same the internal wiring is the same but the thread pitch is different. I got a female m16x1.50 to male 3/8 npt adapter. Hope this helps anyone with an earlier car"

OE# 89462-30011

Switch
Switch
Adapter
Adapter
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Old Sep 26, 2025 | 11:24 AM
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Originally Posted by MrRenoman;[url=tel:1608405879
1608405879[/url]]Ran across this. I can't confirm but it's probably worth checking. I see the switch on Ebay with prices across the board. Maybe it'll help someone on here.

"Not sure if this is a known fix but I figured this out. This is for anyone who has issues with their cold start injector and the thermal switch is bad and we all know the switch isn’t available or are stupid expensive if you can find one. I found this thermal switch used in older Toyota 22re engines. The connector is the same the internal wiring is the same but the thread pitch is different. I got a female m16x1.50 to male 3/8 npt adapter. Hope this helps anyone with an earlier car"

OE# 89462-30011

Switch
Switch
Adapter
Adapter
thanks I’m gonna give this a try.

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