[928uk] NTC2 variants - was Cheap LH-Jetronic temp sensor II NTC2

Fri Jun 7 09:59:45 UTC 2024

I believe that's the same number that is stamped on Paul's (87S4) Lemark
sensor that measures incorrectly. His came in a Lemark branded box with SMP
Europe in the small print. Definitely not an FAE 33090 and definitely not
correct for a 928.

Best regards
Jonathan

1991 928 GT Amethyst Metallic

On Thu, 6 Jun 2024, 1:34 pm Simon Painter, <simonpainter101 at gmail.com>
wrote:

> The only stamping is 096050 455 on both of them.
>
> Thanks
>
> Simon.
>
> On 6 Jun 2024, at 13:07, jonathanrackowe at gmail.com wrote:
>
> 
>
> It must have 33090 stamped on it as well Simon. FAE make a lot of temp
> sensors, and NTC resistors come with all sorts of temp-resistance curves.
>
>
>
> Best regards,
>
> Jonathan
>
>
>
>
>
>
> *From:* Simon Painter <simonpainter101 at gmail.com>
> *Sent:* 06 June 2024 12:14
> *To:* jonathan at rackowe.net; 928 List <928uk at lists.928.org.uk>
> *Cc:* Paul <ukkid35 at gmail.com>
> *Subject:* Re: [928uk] NTC2 variants - was Cheap LH-Jetronic temp sensor
> II NTC2
>
>
>
> The temperature when hot is just as important.
>
>
>
> I’ve just checked the two new, out of spec ones I have and neither have
> FAE stamped on them. I’m sure I ordered an FAE, but hey…..
>
>
>
> I’ll order a proper FAE item and see how that measures up.
>
>
>
> Thanks
>
>
>
> Simon.
>
>
>
> On 6 Jun 2024, at 11:24, jonathanrackowe at gmail.com wrote:
>
> 
>
> Yesterday I measured my spare FAE 33090 and my original Bosch Temp sensor
> 2 from my 928 GT. Both measured the same: 2.4KΩ at ambient temperature.
>
>
>
> My FAE 33090 came in an FAE box and it has FAE 33090 stamped on the brass
> housing.
>
>
>
> I have an FAE 33090 fitted Feb 2023 in my 928 GT and the rebuilt engine is
> running fantastically with it 😊
>
>
>
> Bit confused by people saying they have out of spec FAE 33090 sensors.
>
> Best regards,
> Jonathan
>
> 1991 928 GT Amethyst Metallic
>
>
>
>
>
> *From:* jonathan at rackowe.net
> *Sent:* 02 June 2024 10:21
> *To:* Simon Painter <simonpainter101 at gmail.com>; jonathan at rackowe.net
> *Cc:* Paul <ukkid35 at gmail.com>; 928 List <928uk at lists.928.org.uk>
> *Subject:* RE: [928uk] NTC2 variants - was Cheap LH-Jetronic temp sensor
> II NTC2
>
>
>
> I’ve retitled this thread NTC2 variants, got rid of all the reply arrows
> (please turn these off if you can), and snipped last year’s stuff as the
> thread had become huge and difficult to read.
>
>
>
> My 928 GT has an FAE 33090 that I fitted last Feb. It measured within spec
> at garage temp (around 15C) back then, and the car runs fine with it. I
> didn’t check it at higher temperatures. It has ‘FAE 33090’ stamped on the
> brass housing.
>
>
>
> Simon, is your FAE sensor a 33090? Does it have ‘FAE 33090’ stamped on the
> brass housing? Where did you buy it?
>
> Best regards,
> Jonathan
>
> 1991 928 GT Amethyst Metallic
>
>
>
>
>
>
>
>
>
> *From:* Simon Painter <simonpainter101 at gmail.com>
> *Sent:* 02 June 2024 08:40
> *To:* jonathan at rackowe.net
> *Cc:* Paul <ukkid35 at gmail.com>; 928 List <928uk at lists.928.org.uk>
> *Subject:* Re: [928uk] Cheap LH-Jetronic temp sensor II NTC2
>
>
>
> The FAE Temp2 sensor reads:
>
>
>
> 20C - 5.3k
>
> 32C - 4k
>
> 46C - 2.4k
>
> 60C - 1.5k
>
> 70C - 0.93k
>
>
>
> I was quite surprised how the Temp2 sensor affects starting. I have an
> ongoing issue with re-starting when hot, eg re-starting after filling fuel.
> It will turn over quite slowly compared to a cold start. One day after a
> fuel stop, I unplugged the Temp2 connector and just plugged in a new FAE
> sensor and left it hanging loose. The engine turned over really quickly! It
> didn’t want to start as it was probably running with a super rich mixture
> as the Temp2 sensor was cold and engine hot.
>
>
>
> I’m pretty sure my original Bosch Temp2 sensor is causing my hot re-start
> issue but I have yet to find a good replacement that is in spec.
>
>
>
> Thanks
>
>
>
> Simon.
>
> Check me out on Instagram and Facebook @oldcarfixer
>
>
>
>
>
> On 1 Jun 2024, at 23:41, Jonathan Rackowe <jonathanrackowe at gmail.com>
> wrote:
>
> 
>
> What does your FAE one measure Simon?
>
>
>
> Best regards
>
> Jonathan
>
>
>
> 1991 928 GT Amethyst Metallic
>
>
> ------------------------------
>
>
>
> On Sat, 1 Jun 2024, 3:55 pm Simon Painter, <simonpainter101 at gmail.com>
> wrote:
>
> I’ve now bought two (one an FAE) and both measure way off what they are
> supposed to be. I’m trying to get gold of an original Bosch one.
>
> Thanks
>
> Simon.
> ------------------------------
>
>
> -----Original Message-----
> On 1 Jun 2024, at 15:51, Jonathan Rackowe via 928uk <
> 928uk at lists.928.org.uk> wrote:
>
> Definitely one to return as defective.
>
> Maybe Vince can sell you one of the several FAE ones that he bought to
> keep them in the 928 community.
>
>
>
> Best regards
>
> Jonathan
>
>
>
> 1991 928 GT Amethyst Metallic
>
>
>
>
>
>
> -----Original Message-----
> On Sat, 1 Jun 2024, 3:42 pm Paul, <ukkid35 at gmail.com> wrote:
>
> 15C - 6k
> 60C - 1.2k
>
> Both circuits measured the same, on old and new sensor
>
>
> Paul
>
>
>
>
> -----Original Message-----
> On Sat, 1 Jun 2024 at 15:36, Jonathan Rackowe <jonathanrackowe at gmail.com>
> wrote:
>
> What were your measured results at 15C and 60C Paul?
>
>
>
> Best regards
>
> Jonathan
>
>
>
> 1991 928 GT Amethyst Metallic
>
>
>
>
>
> -----Original Message-----
>
> On Sat, 1 Jun 2024, 1:20 pm Paul, <ukkid35 at gmail.com> wrote:
>
>
>
> Sadly the Lemark sensor I bought is faulty, or at least off spec
>
>
>
> I compared it with the old one, and with the specs, and found that the new
> sensor reads approximately double the resistance that it should, checking
> at 15C and 60C
>
>
>
> The Temp Sensor II resistance measurements should be:
>
> 0 C / 32 F:  4.4k to 6.0k Ohms
> 15 - 30 C / 59 - 86 F: 1.4k to 3.6k Ohms
> 40 C / 104 F: 0.9 to 1.3k Ohm
> 60 C / 140 F: 480 to 720 Ohms
> 80 C / 176 F: 250 to 390 Ohm
>
>
>
> Disappointing
>
>
>
> Paul
>
> 87 S4 Manual
>
>
> ------------------------------
>
>
>
>
>
> -----Original Message-----
> On Mon, 20 May 2024 at 17:47, <jonathanrackowe at gmail.com> wrote:
>
> Hi Paul,
>
>
>
> That's a Lemark one, not an FAE33090, but it'll probably work just as well
> and good to have any version as a spare.
>
>
>
> Best regards,
>
> Jonathan
>
>
>
> 1991 928 GT Amethyst Metallic
>
>
>
>
>
>
>
> -----Original Message-----
>
> From: 928uk <928uk-bounces at lists.928.org.uk> On Behalf Of Paul via 928uk
>
> Sent: 20 May 2024 14:46
>
> To: 928uk at lists.928.org.uk
>
> Subject: Re: [928uk] Cheap LH-Jetronic temp sensor II NTC2
>
>
>
> A week ago I drove back from Germany in my other car, which had suffered a
>
> coolant temp sensor failure, not a pleasant or relaxing experience, as the
>
> rad fans never came on
>
>
>
> I don't want to risk the same in the 928 so I've just bought an FAE 33090,
>
> for the same price as last year, result!
>
>
>
> https://www.ebay.co.uk/itm/355597952746
>
>
>
> Paul
>
> 87 S4 Manual
>
>
>
>