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Old 02-06-2008, 02:23 PM   #16
mirek
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take it to BMW. I spent thousands of dollars and years, guessing what it could have been. Took it to BMW, spend 110$ for 1 hr of diag, and they told me exactly what it was.
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Old 02-07-2008, 04:38 PM   #17
Dr. Flyview
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You might've put holes in the boot/tube connecting to the MAF. Try and replace that, and be very careful with it.
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Old 02-13-2008, 06:58 PM   #18
m3guy
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Hey Everyone I have a question about getting my CO% down if I use high test 93 octane for the e test would it bring my reading down maybe plus 1 L of menthol hydrate to 1/4 tank of gas?
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Old 02-13-2008, 07:27 PM   #19
rlim
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I agree with Mirek, take the car to the dealer and let them diagnose the problem. Avoid spending unnecessary money replacing parts when you're unsure of the problem. Otherwise, invest in a Bentley manual and Peake diagnostic tool, and start learning more on your Beemer. That is the cost of owning a BMW.
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Old 02-13-2008, 07:30 PM   #20
m3guy
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I refuse,For them to hook something up to my car for 200 bucks and say well it could be this,I replace it and doesnt help me,That bently manual tells u how to repair stuff not diagnose,I did plugs oil and O2 sensor the first etest I did failed Co$ was at 7.37 went down to 1.38 and my hc obviously dropped their is not much to these 1.8 m42 engines I just hope someone can relate to me and had the same problem
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Old 02-13-2008, 07:55 PM   #21
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Well it's not 200$ and they don't say "well it could be this". The dealer knows the cars very well and can usually pin point the reason for failed emission in 1 hour. I paid ~100$ and had a definite answer. Go ahead and refuse, keep guessing, is your frustration and trial and error really worth 100?
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Old 02-13-2008, 08:19 PM   #22
m3guy
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yeah good point man,Its just soo anoying....Have you ever tried guaranteed to pass,It just seams that I checked everything and I have no codes makes everything soo anoying
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Old 02-13-2008, 08:28 PM   #23
mirek
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If you have anything in your car that is broken, you will fail, and the "guarantee" does not apply. The guarantee only works if everything is working. And if everything in your car is working fine, your car should pass no problem, so that product is shit.

Honestly, take it from a stubborn guy, don't waste anymore time trying to guess, it's not worth the hassle. Most likely your cat or o2 sensor are toast, and BMW can tell you that in under an hour.
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Old 02-15-2008, 05:11 PM   #24
SeRb
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Wouldn't you still want your car to run properly though?
of course i would, I'm just saying that could be one of his options
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Old 02-15-2008, 08:21 PM   #25
franco_330i
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My car was idleing rough (318 also) bouncing up and down as you say , actually stalled out a couple times, took it to a shop hooked up the scan tool, found out my hose coming out of the air box to the throttle body had a huge hole in it, taped it up (temp fix till i got a new one) and i was on my way. Best $110 I ever spent
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