This is an excerpt from the factory E30 repair manual instructing how to mechanically and electrically test the ICV (idle control valve) for an M20 engine.
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In the vast majority of cases, vacuum leaks are to blame for poor or inconsistent idle issues on M20 engines found in E30’s. Vacuum leaks basically mean air that is entering the engine where the air flow meter has not had a chance to meter it. Unmetered air, is unexpected air, and as such...
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In the world of alternators the one used on most all E30’s is quite simple and straight forward. The Bosch alternators are a a two post design, with D+ and B+ terminals. B+ (also called 30) is the larger of the two and routes through the starter, then the battery junction box and finally...
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Near most idle issues are derived from unmetered air entering the intake past the AFM (Airflow Meter). Simplified, it means you have a hole in one of your connections, gasket matting surfaces or intake related hoses. Un-metered air is a fancy way of saying that you have additional air entering your system that the...
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The E30 was built with with a vent-free fuel cap, and it was for a reason. If you’ve ever placed your finger on the end of a straw with liquid in it, you will have found that the liquid doesn’t fall out the bottom. Similarly, the 80’s fuel system is designed with this pressure...
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Alpine CM5905, CM5907 Bulb: T1-1/4 12v 75ma (4mm) If you follow this video along until 3:12, it will be clear how to remove the bulb holder, then all you need to do is unsolder and resolder the new bulbs. Pioneer KE-91ZBM, KE-92ZBM Bulb: T1 8v 60ma (3mm)
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Other than a coolant leak around the heater core, most wet carpets are a byproduct of the water drains being clogged. The water has nowhere to drain and backs up and flows into where it shouldn’t; either your interior or settles and causes moisture/rust where it shouldn’t. The good news is that cleaning the...
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E30Zone already has a great resource and flow chart to follow along with; in part this article is to backup that great information, but also to add onto a couple things to check to quickly and effectively rule out common issues related to no start conditions. Crank no start condition: Check to see if...
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OEM injectors are pintle design; good for its time, but there have been many generational iterations of fuel injectors since. Recently BMW aligned with Bosch to release a direct replacement 14.5lb gen 3 injector that is 4 hole (disc type). 4 hole injectors provide for much better fuel atomization when compared to pintle design;...
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Fixing your AC vents so they are no longer floppy is easier than you think. All you need is: Flat head screw driver Nylon washers 20 min To remove an AC vent all you have to do is point it down until you feel it click, then with a thin screw driver carefully push...
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