|
Xoutpost server transfer and maintenance is occurring.... |
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Engine runs rough after valve cover/TCC replacement
__________________
2003 X5 4.4i 1992 Porsche 968 2007 328i 2014 Subaru Forester XT |
Sponsored Links | |
|
#2
|
||||
|
||||
did you unplug any wires? Could be a loose connection or something incorrectly plugged in.
__________________
2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#3
|
|||
|
|||
lol - only about 20. But so far, everything seems to be plugged back in correctly. I really need to have to codes read to narrow down the area the problem might be coming from, but the auto parts stores aren't open today.
__________________
2003 X5 4.4i 1992 Porsche 968 2007 328i 2014 Subaru Forester XT |
#4
|
|||
|
|||
I feel for you.
Its probably worth checking your spark plugs look ok and are properly tightened with the coils well seated. The spark plugs were the source of my last mystery roughness.... The previous "mystery" was finding the check valve in the vacuum line (white/black plastic connector, about as big around as a quarter) was reversed...
__________________
David.X5 2001 X5 4.4i Sport SOLD! at 160k miles |
#5
|
|||
|
|||
Hmmm... Interesting theory. I didn't touch the spark plugs, so I doubt there's a problem with them, but I did notice the coils didn't sanp into place smartly like I had expected. The engine really feels like it's running on about five cylinders. Are the coils supposed to snap into place on the spark plugs? Is there a trick to getting them seated properly? Thanks.
__________________
2003 X5 4.4i 1992 Porsche 968 2007 328i 2014 Subaru Forester XT |
#6
|
|||
|
|||
The rubber boots (which can be bought separately) should "pop" on. If you aren't feeling that then I would suspect they aren't seated well. Dielectric grease can help, but it is likely there is some there already.
__________________
David.X5 2001 X5 4.4i Sport SOLD! at 160k miles |
#7
|
|||
|
|||
Thanks; I'll definitely take a look at this, although I won't have the opportunity for a few days.
__________________
2003 X5 4.4i 1992 Porsche 968 2007 328i 2014 Subaru Forester XT |
#8
|
|||
|
|||
Just to clarify, when I insert the coils into their respective spark plug holes and press down, they "bounce" back up maybe 1/8". They never actually seat onto the spark plugs. I had to rely on the tightening of the nuts to get the coils to fully seat against the heads. All eight of the coils behaved this way. I don't remember this type of behavior on any of my other BMWs. Does this sound like it could be behind my engine's rough running?
__________________
2003 X5 4.4i 1992 Porsche 968 2007 328i 2014 Subaru Forester XT |
#9
|
|||
|
|||
The boot is separate from the coil. I attach the boot to the coil first. You should feel that click into place. I then attach the boot+coil onto the plug. You should feel that click into place. If the boots are new or newish, they seem to stand up a little and will get pushed down a little as you tighten the mounting nuts. Pay attention not to forget the electrical grounds that should go under the mounting nuts.
Hope that helps. David
__________________
David.X5 2001 X5 4.4i Sport SOLD! at 160k miles |
#10
|
|||
|
|||
Hmmm... I wasn't even aware the boot was separate from the coil - the boot and coil have always come out as one unit. I think I'll try removing the coil/boot assemblies, then removing the boots from the coils, reattaching them, and then pushing the boot/coil assembly back into the spark plug hole. Definitely not feeling anything click into place at this point. I wonder if the boots separated a bit from the coils as I was pulling them out. Thanks for the info.
__________________
2003 X5 4.4i 1992 Porsche 968 2007 328i 2014 Subaru Forester XT |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|
|