Lloyd: The transponder is part of the EWS immobilizer system that was introduced in January 1995. Thus your 1991 E31 should not have keys with transponders, nor a ring antenna around the ignition lock barrel.
Its just to hot to start
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Ok then what is the relay number that I should change? Its worth also pointing out that sometimes when turning the key it takes a second or two to fire up, not ever time but probably 1 in 5.
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Is this the relay and is it worth changing?
05Starter interlock relay161358364175 -
Sorry for the misinformation
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Do this test first - and then you will know where the problem is more likely to be:
http://www.8er.org/forum/showpost.php?p=99888&postcount=12 -
Thanks Timm I plan to but is so intermittent that when it does happen its not usually the ideal location. i.e. I can replicate it outside the house. I will try and get the car warm over the weekend so watch this space.
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Timm I got the car nice and warm following a 1hr 30 min drive and 3 mins after the car was stopped on the drive I tried to restart it would not start. I tested pin number 11 on the diagnostic port and it showed 7.09 volts whilst the battery at the charging point showed 11.91volts.
So your thoughts guys. -
7V at pin 11 is just confusing! If that was the voltage read as the key was turned, then I would say the problem is either the ignition switch or the starter relay K1. K1 is in the Front Power Distribution box - and is cheaper and easier to replace than the ignition switch so start there!
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Timm that was the voltage as the key was turned i.e. it was 0 volts and the went upto 7.09volts as the key was turned to the start point at which the engine would normally turn over. What is the part number for the K1 relay I will give the stealers a call
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Zitat von Lloyd;100227
whilst the battery at the charging point showed 11.91volts.
After a 1.5 hour drive doesn't this indicate knackered batteries or charging system. -
Well gents I got up this morning and went to my local stealers and bought the new replacement relay which is now light green Part No B61.36.8.373.700 for the bargain price of £9.70
Once I was back at home I carried out the following test and the findings are below.
I did not check the charging voltage on the old relay but I dont think that would have changed.
With both relays the car started although the voltage at pin 11 was differant.
As always your thoughts are welcome -
All a bit inconclusive - although the lower start-up voltage on the old relay could indicate a fault. Best give it a bit more time!
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Indeed I will check the cranking voltage on pin 11 next time the car is nice and hot.
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