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03-30-2012, 02:08 AM | #1 |
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JB4 help
I have bought a JB4 and i got it installed i have been running it on map1 it was working fine for the past two weeks. the other day i was driving and i down shifted the car to accelerate and service engine soon light comes on and the car starts to vibrate and acts wierd. so i turned off the car and the light went away. therefore, everytime i push the gas pedal all the way i get the same problem. but if i turn off the JB4 and push the gas pedal i get no problem.please help if any one has encounter this problem before.thanks
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03-30-2012, 02:24 AM | #3 | |
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03-30-2012, 12:26 PM | #5 |
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I have did that and I had my car at The dealership they changed my high pressure gas pump and the injectors. I don't know what exactly is the problem because sometime it works fine and sometime it does not. They have told me that I might need an update for the JB4 I was wondering if this is the problem.
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03-30-2012, 07:41 PM | #8 |
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First thing is spark plugs, use another cylinder's plug and see if the prob stays in cylinder 6. I so then swap coils and see if it once again stays in cyl 6. If it still does than its either an injectors or you need to clean your intake valves
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03-31-2012, 02:27 PM | #9 | |
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03-31-2012, 02:31 PM | #10 |
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How would intake valves via carbon buildup cause a misfire? Carbon buildup would create poor(decreased) power but not a misfire.
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03-31-2012, 05:43 PM | #11 |
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I found what was the problem. It is the spark plugs I had the one prone head on it but it suppose to be the three prone head. I have to change them on Monday and will see that will happen.
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03-31-2012, 06:36 PM | #13 | |
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I would also reccomend you only to use/buy spark plugs bought from a BMW dealer. Some people have had issues with aftermarket Bosch plugs with the same specs as the BMW-Bosch plugs. I don't know why that is... but to be on the safe side I would just buy your replacement plugs from a BMW dealer. Maybe my DIY might help you out... 135i Spark Plug replacement DIY... http://www.1addicts.com/forums/showthread.php?t=602804 |
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