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code p1347
02-02-2016, 03:52 AM
Post: #1
Sad code p1347
I have 2001 bmw 325i automatic 6 cylinder - 1st check engine light on, code p1347 misfire 3rd cylinder on 1/14/16. 1/18/16 my mechanic check it switch ignition coil & replace 6 spark plug, erase the code, after a week 2nd check engine light on again. I check again the code appear to come on same code p1347, i erase it again. 4 days later the 3rd check engine light on again, same code. I check battery is good, check alternator is good. I don't know what else to do. What would be the problem, and how do fix this. I can't drive with the check engine light on to long it might mess up something. I need help
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02-02-2016, 07:27 AM
Post: #2
RE: code p1347
Here's a link to some information. < http://www.autocodes.com/p1347_bmw.html >
I hope that helps. Please let us know what you find.

Thanks for using the forum,
Garner

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02-04-2016, 01:50 AM
Post: #3
Sad RE: code p1347
(02-02-2016 07:27 AM)Garner Wrote:  Here's a link to some information. < http://www.autocodes.com/p1347_bmw.html >
I hope that helps. Please let us know what you find.

p1347 bmw - misfire cylinder 3 with fuel cut-off. What does this mean? I replace 6 new spark plugs.Sad
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02-04-2016, 03:44 AM
Post: #4
RE: code p1347
I read somewhere that another person had this same issue and the way they fixed it was to trace the spark plug wire in cylinder 3 back to the coil pack and changed that out and that solved the problem for him.
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02-04-2016, 11:02 AM (This post was last modified: 02-04-2016 11:03 AM by Rupe.)
Post: #5
RE: code p1347
I think Sandman is onto something here. The part where it says "with fuel cut off" is a hint that the ECM shuts off the fuel because the cylinder is not firing properly and still has a problem. Fuel shut off helps prevent damage to the cat converter with raw fuel in the exhaust. My first guess is that coil pack or it's wiring on the primary side. (bad ground on an old car?) I'd also check the compression while you have access and note the plug color in case it's a stuck injector. If this does not have coil packs it could also be a bad plug wire.
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02-05-2016, 06:52 AM
Post: #6
RE: code p1347
Going down the list on the link that I posted, I see that they mention the coil and coil wiring 3 times as possible causes. So even if the mechanic changed the coil it doesn't mean that the wiring going to the coil is good. He needs to check the connections for corrosion and proper contact. Also check to see that the wires aren't pinched, rubbed through, melted... Here's the list from the link I posted.
- Faulty Spark Plug
- Faulty Ignition Coil
- Intake vacuum leak
- Faulty Camshaft Position Sensor
- Ignition Coil harness is open or shorted
- Ignition Coil circuit poor electrical connection
So replacing the plugs and switching the coil "Should" eliminate those two things. Now the rest of the things on the list need to be examined. As Rupe mentioned, it could be as simple as the coil having a corroded ground. It could be that the wire going to the ECM is broken or not making a connection?

Please let us know what you find.

Thanks for using the forum,
Garner

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