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BMW 3-Series (E90 E92) Forum
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Unusual shudder. i dont know what else to replace.
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12-04-2012, 11:35 AM | #1 |
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Unusual shudder. i dont know what else to replace.
Okay...finally got my car done it runs great i guess. things i replaced are
all new -Turbos, all hardware and lines. -6 injectors -6 plugs -6coils -CPS sensor -new Vanos selionids -Clean intake valves - RB PCV upgrade -Valve cover gasket -T-stat -Water pump - Transmission flush and New sealing sleeve and filter pan. -Diff flush - Oil filter housing Gasket, and oil cooler gasket and gaskets for the lines going to the cooler. - new transmission cooler -new oil duh - new coolant duh Don't ask me how much i spent.. lol and all that cleared up the smoke coming from my exhaust. So if your smoking do the above cant remember what else. but all that is changed, and new. now the car starts fine. and when i drive it it drives great but i have a little bit of a shudder i dunno if its knock but you cant hear it but i can feel it i guess in the brake when I'm sitting at a light. LOL maybe a new belt? i visually inspected the belt when the car was stripped while installing the turbos the belt looked fine, can think of any other wear and tear that could cause this. help Last edited by sammy_0559; 12-04-2012 at 11:50 AM.. |
12-04-2012, 11:39 AM | #2 |
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HPFP? Get any codes?
That's pretty much the only thing you DIDN'T replace with the car.
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12-04-2012, 11:42 AM | #3 |
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12-04-2012, 11:46 AM | #4 |
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The n54 is notorious for a slight shudder at idle almost as if it's missing. I took my car to the dealer about this issue when I first bought my car because I thought something was wrong, but now I just live with it. Plug change did help a bit, now it's not as drastic as it was in the past. Apparently it will never be the smooth running engine at idle as we would all like it to be.
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12-04-2012, 11:51 AM | #5 |
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Normally I would say leaky injectors, but in most respects, the N54 and poor idle is the same as water is wet. I bought my car new with 1.3 miles on it, and the idle was crap then too.
However, new injectors doesn't mean the were coded correctly, or they sat correctly. Usually a leaky injector shows signs of fouling plugs in those cylinders. Check your plugs, if they are all the same color, your injectors are probably fine, so you can rule them out again. |
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12-04-2012, 11:57 AM | #6 | |
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12-04-2012, 12:11 PM | #7 |
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Drive it hard. There may be carbon buildup inside one or more of the combustion chambers causing a poor idle. It can happen easily if you have excessive oil dumping into the intake ports (usually 5 is the worst) from the PCV system and/or a bad injector.
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12-04-2012, 12:46 PM | #8 | |
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And I'm babying the turbos cuz new for about 100-150 miles |
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12-04-2012, 12:48 PM | #9 | |
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My last car had that shutter you speak of, but it was because I had over sized injectors from the blower and nitrous i was running. A little tuning fixed that though. It's usually fuel related when you get that random shudder. |
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12-04-2012, 01:35 PM | #10 | |
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but your right it might be tune related. time to hit up terry! |
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12-04-2012, 02:26 PM | #11 |
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I thought you were waiting on stage2??
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12-04-2012, 03:38 PM | #12 |
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