N55 very slight rough idle

Nickco43 · 07-09-2020, 01:21 PM

I have a PWG N55 that I just put in a new LPFP, spark plugs, injectors and coil packs in. The idle is slightly rough and can be felt while inside the car. There is zero moment on the tacho when this is happening. No codes or check engine light as well. Any ideas why this might be happening? HPFP, vacuum leak, etc? My car has 98k miles on it. I have a ICOM and ISTA+ for any diagnosis.

upsidedownfunnel · 07-10-2020, 01:56 PM

Are you sure that's new? It could just mean you need a new motor or transmission mount. We tend to be much more critical of small issues immediately after we've done work on our cars.

Nickco43 · 07-10-2020, 11:50 PM

Quote:

Originally Posted by upsidedownfunnel

Are you sure that's new? It could just mean you need a new motor or transmission mount. We tend to be much more critical of small issues immediately after we've done work on our cars.

I just personal replaced everything. I installed a charge pipe and now it runs perfect. I guess there was a crack.

07-09-2020, 01:21 PM	#1
Nickco43 Lieutenant Colonel 1458 Rep 1,912 Posts Drives: 08 E92 BMW M3 Join Date: Apr 2018 Location: Denver, CO iTrader: (1) Garage List 2008 BMW [0.00]	N55 very slight rough idle I have a PWG N55 that I just put in a new LPFP, spark plugs, injectors and coil packs in. The idle is slightly rough and can be felt while inside the car. There is zero moment on the tacho when this is happening. No codes or check engine light as well. Any ideas why this might be happening? HPFP, vacuum leak, etc? My car has 98k miles on it. I have a ICOM and ISTA+ for any diagnosis.
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07-10-2020, 01:56 PM	#2
upsidedownfunnel Colonel 1996 Rep 2,499 Posts Drives: 2014 335i Join Date: Jul 2017 Location: SoCal iTrader: (4) Garage List 2014 BMW 335i [0.00]	Are you sure that's new? It could just mean you need a new motor or transmission mount. We tend to be much more critical of small issues immediately after we've done work on our cars.
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