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woolveren
02-20-2015, 02:59 PM
Hello,

Today morning the tachometer in my car shoot up one point a few number of times when the accelerator pedal was depressed in neutral. Please see the video below @ 0.08 and .12 seconds.

Car is a 98 AEB Manual FWD.

Temperature was -20 degree and this happened only in the first few minutes after cold start. The problem went away after driving car for around 10 minutes when the operating temperature become normal.

Could this be just because of extreme cold weather?



https://www.youtube.com/watch?v=d75H514bDqw

viceprp
02-20-2015, 03:41 PM
Probably your engine speed sensor reading off bc of the cold weather.

Seerlah
02-20-2015, 07:39 PM
^This

I had a cheap "hole me over" crap out on me on one of the coldest days last year. Parked car, ran into bank, come out and car won't start (knew this was the issue immediately). Never again will I have a "hold me over" in there for too long. Bosch or nothing.

woolveren
02-21-2015, 11:08 AM
Probably your engine speed sensor reading off bc of the cold weather.

I too believe that the sensor is probably at the end of its life, don't think this was ever replaced in my car. It has around 260K miles now.


Never again will I have a "hold me over" in there for too long. Bosch or nothing.

I couldn't find a Bosch crankshaft sensor for AEB engine, everywhere I see FAE brand as OEM. In fact, Bosch sensor catalog for AEB doesn't have a crankshaft sensor listed.

Any experience with FAE brand?Genuine Audi is ridiculously overpriced at $266.

http://www.ecstuning.com/Audi-B5_A4-FWD-1.8T/Engine/Electrical/Sensors/Speed/ES2550890/

http://i62.tinypic.com/ftzg5t.png

Seerlah
02-21-2015, 11:52 AM
I believe the only difference between the sensors are the plastic connector. They are shaped differently. With that being said, I would contact FCP and inquire about the part below. It says OEM supplier, but confirm that it is indeed "Original Manufacturer Equipment" and that advertisement is used correctly.

https://www.fcpeuro.com/products/audi-vw-engine-crankshaft-position-sensor-a4-a4-quattro-passat-050906433

woolveren
02-21-2015, 12:01 PM
I believe the only difference between the sensors are the plastic connector. They are shaped differently. With that being said, I would contact FCP and inquire about the part below. It says OEM supplier, but confirm that it is indeed "Original Manufacturer Equipment" and that advertisement is used correctly.

https://www.fcpeuro.com/products/audi-vw-engine-crankshaft-position-sensor-a4-a4-quattro-passat-050906433

If the picture in FCP is that of the actual OEM sensor, then it matches closely with the genuine audi sensor. Compared to FAE, the FCP sensor looks more similar to OE one and also has a hole at the middle of the connector which FAE doesn't have. I would call FCP and see which brand it is..

viceprp
02-21-2015, 01:03 PM
Bosch doesn't make this sensor for the 058, but they do for the 06a. I Have 2 spare oem plugs off blocks I bought.

woolveren
02-22-2015, 02:20 PM
I found this below from Bentley and checked the resistance across pin 2 and 3. Measured resistance was 444 Ohms which doesn't fall in the range specified in Bentley.

Does anybody know whether this range mentioned in the bentley is for all ambient air temperatures?

Because I have checked the resistance before cold start so outside temperature was below zero degree and we know that the resistance decrease with decrease in temperature..


http://i61.tinypic.com/qsox6o.png