@StarBear L Jetronic Temp Sensor II AFM |
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@StarBear L Jetronic Temp Sensor II AFM |
wonkipop |
Jun 5 2023, 03:12 PM
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#21
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Advanced Member Group: Members Posts: 4,403 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille |
@StarBear .
here is what i have on the Temp Sensor II inbuilt into the AFM on the 1.8 L Jetronic. i could be wrong but i don't think there is any effective way to test the air temp sensor in the AFM on our adam/eve in the garden of eden L Jetronic system. that sensor is not wired in separately. but maybe there is an expert here who knows. - in relation to the problem you are having with hot days and ultra high humidity causing the idle to drop to barely running - i'm not sure the symptom fits a faulty Temp Sensor II in the AFM. others here might know better. I would not have thought a faulty sensor would cause that dramatic a result. Temp Sensor 1 (CHT) - yes. but Temp Sensor II no. i am sure @Van B will pipe in with a more learned view. I would have thought Temp Sensor 2 fault would make the car run rich. I think that is how it would work. but again i am probably wrong. i'd have to think about it. most trouble shooting literature i can dig up says failure mode causes car to run richer generally. increased fuel consumption. |
StarBear |
Jun 15 2023, 10:34 AM
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#22
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Senior Member Group: Members Posts: 1,913 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States |
Now this just got real interesting!
Opened the NOS unit, inspected, and took data measurements as @clayperrine suggested. Will post results separately. Opened my original in-car unit, inspected -- and noticed significant differences between the two units' internals. 1. My original unit has no black wires (as believed and indicated by @wonkipop ), and two part numbers on the black cover cap. See pic. This one has an "011" ending number on the internal mechanism. 2. The NOS unit, still in its original box, has the same part number but 3 differences inside (including the 2 black wires) and only one part number on the black cover cap. See pic This latter one has an "021" ending number on the internal mechanism - a superceded version. A few other small differences, like Phillips head screws on the body instead of slotted screws, etc, but all minor Seems like (?) Bosch superceded the mechanism part, but not for VW?? (IMG:style_emoticons/default/WTF.gif) |
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