Is it safe to drive 10 miles (to the dealer) on 5 cylinders? One coil bad..

P11 · Tue, Dec-15-2009, 09:28:18 PM

Quote:

Originally Posted by deilenberger

Your indy mechanic is wrong. On a BMW - the ECU detects the non-firing plug and turns the injector off for that cylinder.

This is what I was told by him in regards to my 97 540i. Regardless, its good to know the M is smart enough to shut down the injector.

GR///M3 · Tue, Dec-15-2009, 09:32:47 PM

Quote:

Originally Posted by kmfurdm

I'm not the only one.

When I had a coil go bad, the code read "Misfire with fuel cutoff"...which is to say no fuel is entering that cylinder.

so i take it as fact then.....

BMW engineering always manages to raise a brow....they're that good to think of something like that.....

J02 M3 · Tue, Dec-15-2009, 11:25:34 PM

However, if its a random cylinder misfire, you will still get unburnt fuel in that cylinder, now it may only be a little bit or alot, causing a small amount of unburnt fuel to end up in the oil pan and the cat. Then you'll need an oil change and possibly cat. I'd just get it towed. Why risk it for $50 bucks.

kmfurdm · Tue, Dec-15-2009, 11:31:11 PM

Quote:

Originally Posted by J02 M3

However, if its a random cylinder misfire, you will still get unburnt fuel in that cylinder, now it may only be a little bit or alot, causing a small amount of unburnt fuel to end up in the oil pan and the cat. Then you'll need an oil change and possibly cat. I'd just get it towed. Why risk it for $50 bucks.

If you don't have AAA or maybe the BMWCCA plan there is no way 50 bucks will cover a tow of 10 miles. Not around here anyway. Even a couple of miles will cost 100 or so. Tow guys love to rob you.

Guerillah · Tue, Dec-15-2009, 11:47:13 PM

Cant you just unplug the injectors to the corresponding cylinder? I did this in my old turbo mr2 to pass emissions since it was modded with cams etc, the one cylinder just turned into a air pump. Ran a little rough but nothing ever happened.

boncovi · Tue, Dec-15-2009, 11:53:28 PM

OK, let me specify.

I pulled the shot coil and found out it was almost broken into two pieces. Only a part of the plastic was holding it and it broke in my hand.

Now I have a carrot (coil) cut into two horizontally. Obviously, I'm not crazy to glue it etc. and put it back. So, one cylinder (closest to the cabin) doesn't have a coil on it at all.

The engine is not like vibrating little bit - hesitating etc. It's running like a dryer full of sneakers.

**gogogadgetm3** · Wed, Dec-16-2009, 12:05:33 AM

My previous SA told me that the M cars have lifetime BMW assistance as long as its towing to the nearest BMW dealership

P11 · Wed, Dec-16-2009, 12:13:48 AM

Quote:

Originally Posted by boncovi

OK, let me specify.

I pulled the shot coil and found out it was almost broken into two pieces. Only a part of the plastic was holding it and it broke in my hand.

Now I have a carrot (coil) cut into two horizontally. Obviously, I'm not crazy to glue it etc. and put it back. So, one cylinder (closest to the cabin) doesn't have a coil on it at all.

The engine is not like vibrating little bit - hesitating etc. It's running like a dryer full of sneakers.

You can just buy the ignition coil spark plug connector (that rubber carrot length boot) for around $11-15 and give that a try. From what you are describing, the coil seems intact and functional its just the physical damage in the rubber spark plug connector that is failing.

EDIT: Just realized the M3 ignition coil is one piece.

Raz BMW 43 · Wed, Dec-16-2009, 02:30:05 AM

its 100% fine dont worrie about it i actually did engine 100% good, its uneffected & had it inspected to be sure after, it'll just feel like ur kar is gunna explode haha

extreme limp mode

WkboardAtx · Wed, Dec-16-2009, 04:38:09 AM

Quote:

Originally Posted by deilenberger

Right and wrong. The E46/M3 has lifetime road-side assistance, but when out of warranty - the program is ONLY for tire related problems (since it came with no spare.) Anything else you pay for.

Right on thanks for the clarification!

Tue, Dec-15-2009, 11:25:34 PM	#33
J02 M3 1,2,6th Join Date: Nov 2008 Posts: 778 Reputation: 0 Location: Ontario	However, if its a random cylinder misfire, you will still get unburnt fuel in that cylinder, now it may only be a little bit or alot, causing a small amount of unburnt fuel to end up in the oil pan and the cat. Then you'll need an oil change and possibly cat. I'd just get it towed. Why risk it for $50 bucks. __________________ 02 M, Gloss black side gills, Tein S-Tech's, DBA brakes, 245/35/19 & 275/30/19.

Tue, Dec-15-2009, 11:47:13 PM	#35
Guerillah Registered User Join Date: Dec 2006 Posts: 60 Reputation: 0	Cant you just unplug the injectors to the corresponding cylinder? I did this in my old turbo mr2 to pass emissions since it was modded with cams etc, the one cylinder just turned into a air pump. Ran a little rough but nothing ever happened. __________________ 2002 AW M3 // IR interior // SMG // NO SUNROOF - SOLDDD

Wed, Dec-16-2009, 02:30:05 AM	#39
Raz BMW 43 What Tha Frukc is Razgriz Join Date: May 2008 Posts: 404 Reputation: 0 Location: Chicag-a-ho	its 100% fine dont worrie about it i actually did engine 100% good, its uneffected & had it inspected to be sure after, it'll just feel like ur kar is gunna explode haha extreme limp mode __________________ Razgriz 01' Jet Blakc 6 MT ///M3 (Visual) painted junk, smoked junk, glowing junk, "tha $%#& is that junk: junk", stupid junk, waste of $ junk. (Performance) Fast Junk, weird junk, cool junk, junk junk, unique junk, stupid junk, & more junk.. Mods are ALL junk; why do i have nothing stock then..

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Tue, Dec-15-2009, 11:53:28 PM	#36
boncovi Registered User Join Date: Nov 2009 Posts: 439 Reputation: 0 Location: Jersey girls ain't trash. Trash gets picked up!	OK, let me specify. I pulled the shot coil and found out it was almost broken into two pieces. Only a part of the plastic was holding it and it broke in my hand. Now I have a carrot (coil) cut into two horizontally. Obviously, I'm not crazy to glue it etc. and put it back. So, one cylinder (closest to the cabin) doesn't have a coil on it at all. The engine is not like vibrating little bit - hesitating etc. It's running like a dryer full of sneakers.

Wed, Dec-16-2009, 12:05:33 AM	#37
gogogadgetm3 Banned Join Date: Sep 2009 Posts: 277 Reputation: 0	My previous SA told me that the M cars have lifetime BMW assistance as long as its towing to the nearest BMW dealership