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7 Series - E38 (1995 - 2001)

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Old 02-21-2013, 11:53 PM
Abets740il Abets740il is offline
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Location: Mountain House, CA
Join Date: Jan 2013
Posts: 3
Mein Auto: BMW '01 740iL
Unhappy '01 E38 runs lean after replacing ignition coil

My previous problem was this: The engine was shaking terribly. So I connedted the obdII reader and found code P1351 - Misfire Cylinder 5 With Fuel Cut-off. I read some time ago here int the forum that in order to diagnose this problem correctly was to move the ignition coil from cyl# 5 to the next cyl, cyl# 6 and drive the car for a couple of miles.

After driving it for a day, I had a cel. Connected the obdII reader again and found to have; code P1353 - Misfire Cylinder 6 With Fuel Cut-off! Which concludes that the ignition coil was causing the error msg or cel.

Replaced the ignition coil, erased the code and hope the cel would not come up again. Wrong! It did showed up again after driving the vehicle for a day. And this time the error code was P0174 - System Too Lean (Bank 2)! Now the gas consumption is terrible!

Read and went thru the service manual by Bently, I could not find a solution to cure this problem.

Can someone help me solve this problem please!! Appreciate it!
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Old 02-22-2013, 06:49 AM
rollinpiff rollinpiff is offline
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Location: plainville massachusetts
Join Date: Dec 2011
Posts: 32
Mein Auto: 2001 740il
similar thing on my 2001 il and it was cam sensors, also make sure you do your pcv asap no matter who said its been done do it now so you know
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Old 02-22-2013, 04:34 PM
Espresso Espresso is offline
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Location: Panama City, Panama
Join Date: Oct 2005
Posts: 131
Mein Auto: 2001 740i Sport
new coil SET along with new spark plugs. The coils along with the plugs will run you about $450. If one is in crap shape the rest are soon to follow. dry rot, cracked leaking, etc

keep the coil you just bought for a spare.
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Old 02-23-2013, 04:08 AM
BMW 3-SERIES BMW 3-SERIES is online now
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Location: Arizona
Join Date: Jun 2007
Posts: 438
Mein Auto: 2000 540i Sport (E39)
It'll run lean if you have a vacuum leak or even an O2 sensor misreading. Make sure the coils are OEM not URO ones cause URO is absolute garbage. Nothing of theirs lasts longer than 1 month. Also replacing all 8 is recommended vs replacing one. Replace with used if replacing less than 8.. replace all 8 if replacing more than 2.
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Old 02-23-2013, 10:59 AM
Abets740il Abets740il is offline
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Location: Mountain House, CA
Join Date: Jan 2013
Posts: 3
Mein Auto: BMW '01 740iL

Where can I locate the pcv?
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Old 02-24-2013, 11:58 PM
CharlesAFerg CharlesAFerg is offline
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Location: Portland, Oregon
Join Date: Jan 2007
Posts: 40
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Mein Auto: E34 ///M20 2.5i '89
Rear of the engine. Keep in mind, I'm showing you the diagram for my car.


Should be part # 11617501563

On a similar note, if I reassembled my engine and I didn't necessarily put the coils on the same cylinders, will this cause issues?
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Old 02-25-2013, 01:03 AM
Bigrobsbmw Bigrobsbmw is offline
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Location: Richmond Virginia
Join Date: Mar 2012
Posts: 61
Mein Auto: 2004 745i, 2001 740i
No issues , done it many times
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Old 02-25-2013, 05:36 AM
speedkingrc speedkingrc is offline
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Location: suffolk Virginia( 7 cities)
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Posts: 123
Mein Auto: 88 BMW 735i
misfires? check plugs and see if oil on them. if oil gets down in plugs that can make it misfire also.Check all plugs if u see even some oil on them. then check ur valve cover gaskets. then change ur o2 sensors. the front two not the back two. if it still is running ruff then check coil packs. from what my bmw tech said they dont go bad that often quick. and if you want to change them after doing all that yes change all eight not just one. check ebay they sale used ones for cheap

Last edited by speedkingrc; 02-25-2013 at 05:37 AM.
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Old 10-28-2013, 08:43 PM
Giddyup7585 Giddyup7585 is offline
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Location: Philadelphia
Join Date: Feb 2013
Posts: 76
Mein Auto: 2000 BMW 740i
What a the PVC? I am about to do a complete change, since I do not have all paper work on the car. She runs great, but I want to do it for piece of mind
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Old 10-28-2013, 09:34 PM
Mayorchuck Mayorchuck is offline
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Location: Farley, MO
Join Date: May 2013
Posts: 1,332
Mein Auto: '96 740iL
PVC is the drain pipe in home plumbing. PCV is the back plate on the E38 intake manifold, commonly misidentified as the OSV. Unless your car is smoking on startup or you are getting unusual suction from your dipstick opening, it is probably fine.

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