I finally got the O2 sensor hooked up and, since the car had been running so rich, put in new Bosch Super plugs just in case the old ones were too fucked. Everything is hooked up, connected and should be good to go. But the car barely even runs and won't idle. I checked for heat in the manifolds and only the #6 cylinder seems to be putting out any heat at all. #4 and #5 are warm-ish (could just be heat transfer from #6) and #1-3 are cold as ice. I'm going to check for spark in a minute as soon as I can get an extra set of hands from my neighbor to help out. What's the best way to check for proper injector function? Anything else I should be looking for? I'm a bit stumped on this one.
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Running on 2 cylinders
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try the long screwdriver/stethascope test on the injectors just to listen for the injector firing "tick tick tick tick" this doest mean your pattern is good but at least you will know if its trying to fire (wiring is good)
-Mac
feel free to call or text me with questions, i will help best i can.1989 325i Alpine s52 coupe
2003 540i M-Sport 6 speed
2003 X5 3.0
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Originally posted by LowR3V'in View Postsounds like you may have some wires in the wrong place?
On top of that, I find it extremely hard to believe that any six cylinder motor will actually run on only two cylinders.-Dan
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The spark wires were never touched since the engine ran in the last car but I will check them anyway. I'm using the stock m20 harness and everything bolts right up, including the crank trigger (I left the m30 one in place). Next step is a compression test I guess, see if that tells me anything. I'll keep checking wires too.
The engine was definitely getting compression in 2 cylinders only. With brand new plugs, #1-4 were completely clean; no signs of any combustion. But also no raw fuel even though I hear the injector ticking. Plugs from #5 and #6 had just a light coating of carbon indicating those cylinders were firing.
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Originally posted by CorvallisBMW View PostThe engine was definitely getting compression in 2 cylinders only.
Im assuming you know what this means, or maybe you misspoke. But if your only getting compression on two cylinders, all the spark and fuel in the world isn't going produce proper combustion.
Does it sound normal when you crank it? Or does it crank really fast with the starter then slow down alot for two cylinders?-Dan
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hehe, well that wasy easy lolMtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205
OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827
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