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A post on the uuc digest from jonathan caldito (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Bill R. on October 24, 2000 at 14:19:42:

In Reply to: Re: ignition wire pulse sensor posted by kevin on October 24, 2000 at 13:32:07:

stated that this sensor is for the fuel injection. The sensor tells the injection which plug is firing in sequence, so that the fuel injection is sequential. Each injector opening when the corresponding valve is opening. If that sensor is disconnected then the injectors open in parallel. In clusters of 3 I believe. Not as efficient or as easy to control the exhaust emissions.

I should clarify -- this is for an '89 535i.


A while back I ordered some aftermarket plug wires. This particular brand didn't come with the pulse sensor on it (I think the number 6 wire???), so they left one of the ends off. I had to slide on the sensor and then crimp an end on that wire.

The problem I had was that the wires were thicker and that sensor didn't want to cooperate at all. I finally ended up hacking at the insulation and thinning it out enough to get the sensor on. Ugly but functional.

Here's my question: Since putting it on, I've heard from a couple people that this sensor is actually not utilized by the computer in engine management -- that it's only there for diagnostic purposes when they hook it up in the shop. Does anyone know how I could confirm this? If it's true, I'd just as soon get a replacement wire (without the sensor) and tidy things up in the engine bay a bit. Where could I find out for sure?






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