 Can a CHT sensor go intermittently wonky? |
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| Robson51 |
 Oct 14 2021, 01:32 PM
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Member  Group: Members Posts: 88 Joined: 18-November 19 From: seattle Member No.: 23,654 Region Association: Pacific Northwest  |
I was watching Dr 914s walkaround of a D Jet 2.0 motor, and he makes a comment that the Cylinder Head Temp sensor causes a lot of problems, and can get wonky.
Is it possible for one to test out fine (2750 ohms) and then act bad? I have a strange syndrome where the car was running fine, but developed a rich syndrome very suddenly. Haven't had a chance to check it again, but it was almost new. TIA Rob |
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| Superhawk996 |
Oct 14 2021, 02:08 PM
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914 Guru Group: Members Posts: 5,906 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch 
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Yes. They don't have good stress relief. Intermittent shorting between lead and ground is possible. Likewise because of lack of stress relief, it's possible to have the copper conductor break, and result in an intermittent open which will lead to rich condition.
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| DRPHIL914 |
Oct 14 2021, 02:59 PM
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Dr. Phil Group: Members Posts: 5,768 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States
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QUOTE(Superhawk996 @ Oct 14 2021, 04:08 PM)  Yes. They don't have good stress relief. Intermittent shorting between lead and ground is possible. Likewise because of lack of stress relief, it's possible to have the copper conductor break, and result in an intermittent open which will lead to rich condition. (IMG:style_emoticons/default/agree.gif) but in 12 years of having a d-jet car i have see the suddenly or even intermittently rich issue tied to a MPS issue more than a bad CHT recheck the MPS, Phil |
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| Robson51 |
Oct 14 2021, 03:29 PM
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Member Group: Members Posts: 88 Joined: 18-November 19 From: seattle Member No.: 23,654 Region Association: Pacific Northwest |
QUOTE(DRPHIL914 @ Oct 14 2021, 12:59 PM) QUOTE(Superhawk996 @ Oct 14 2021, 04:08 PM) Yes. They don't have good stress relief. Intermittent shorting between lead and ground is possible. Likewise because of lack of stress relief, it's possible to have the copper conductor break, and result in an intermittent open which will lead to rich condition. (IMG:style_emoticons/default/agree.gif) but in 12 years of having a d-jet car i have see the suddenly or even intermittently rich issue tied to a MPS issue more than a bad CHT recheck the MPS, Phil MPS freshly rebuilt professionally |
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Posts in this topic
Robson51 Can a CHT sensor go intermittently wonky? Oct 14 2021, 01:32 PM
tvdinnerbythepool @Robson51 Absolutely! I was just a victim to ... Oct 14 2021, 03:40 PM
76-914 Might check the CHT wire to the ECU also. Do you h... Oct 14 2021, 03:51 PM Superhawk996
These type headaches are why I converted to water... Oct 14 2021, 04:32 PM Olympic 914 I had one go out intermittently. usually if it goe... Oct 14 2021, 04:26 PM |
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