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Installed new plugs and new coils and now I have code P1343

Tiny
REARDRIVE
  • MEMBER
  • 2002 BMW 745
  • 4.4L
  • V8
  • RWD
  • AUTOMATIC
  • 189,934 MILES
I put in new plugs and new coils now I got this code p1343 misfire in cylinder one with fuel cut-off. What can I do to fix this problem (current code)?
Wednesday, November 30th, 2016 AT 3:42 AM

7 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
I assume you did not have this specific problem before changing the parts so you need to go back and check your work. You are losing spark in that cylinder and you need to find out why. Pull the coil and plug and look for damage to either or the electrical connection.
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Wednesday, November 30th, 2016 AT 4:18 AM
Tiny
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I had a pending code p1350 misfire during start five cylinder, po303, po307 and current po363 misfire detected fueling disabled, p1343, po302, (p1434 no code found) there was different color coil black and gray so I put in new set of coils, I erase the codes. A couple of days a pending code p1343 appear next day the same code appear but in current that the only code for now.
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Wednesday, November 30th, 2016 AT 5:49 AM
Tiny
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Okay, so changing the parts resolved most of your codes. Now you have to find out what the remaining issue is with number one. You will still have to check out everything in the circuit and find out why that cylinder is not getting spark.
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Wednesday, November 30th, 2016 AT 5:55 AM
Tiny
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I have did all the things I know. I would like what else I need to check out while # 1 cylinder not getting spark. How to check out everything in the circuit?
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Thursday, December 15th, 2016 AT 4:51 AM
Tiny
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This is a very sensitive circuit and it's very easy to do damage to the DME electronics through testing. You really should be using a lab scope to test for the proper signals at the wiring harness.
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Thursday, December 15th, 2016 AT 5:02 AM
Tiny
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Before I start thinking about messing around with that sensitive circuit that can damage to the DME. By the way when the car is running I open the oil cap I hear lot of air, same thing happen when I pull out the dip stick. Do it suppose to sound like that?
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Sunday, December 18th, 2016 AT 4:26 AM
Tiny
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Yes
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Sunday, December 18th, 2016 AT 5:08 AM

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