3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
Hello all, I'm new here and currently have an idle problem with my car. Like the title states, it is a '84 325. When it starts, the rpm goes up to +/-3k and then comes back down after about 2sec. Then it revs up and down between +/-1k and 2k while parked.. I'm sure it's probably just a sensor, but I'm not sure.. And input/suggestions would be greatly appreciated! Thanks!
Check your idle control valve. Its the little silver thing on the top of the intake manifold. They go out all time. Usually because they suck up junk from the engine. Give it a good cleaning and see if that helps.
If you unplug the air flow meter with it running and there's no difference or it dies or revs right up, thats the problem and will need to be replaced and if it is dont by a cheap one from ebay, Bosch or siemens is the way to go....pref Bosch
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I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!
Tried idle control valve and didn't do anything different so I swapped one I know works and still did the same revving.. Where is the air flow meter? I'm new to working on bimmers although I know just about everything about motorcycles
__________________ I'd rather be riding my motorcycle thinking about God than sitting in church thinking about my motorcycle.
no, you guys are missing something. On every 325 anything it was Motronics.
with Motronics there is an idle control valve, but there is also a partner control unit for said valve. this control unit is the size of a pack of smokes and sits on top of the main control unit, which resides in the attic of your
glove compartment. check it out....fact is, the idle control valve is run by
this little controller...typically you need to replace the electronic control unit and clean the actual mechanical valve out with Gum-Out or something until you can actually blow through it like a straw and hear the valve work...sometimes you have to replace both as they can burn each other out.
I had a 533i that this very same thing happened too....
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