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Richard
Richard, ASE Certified Technician
Category: BMW
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Experience:  BMW Tech ASE Certified Technician
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BMW X5 4.4i Hi initially getting fault code p0443 evap surge

Customer Question

Hi initially getting fault code p0443 evap surge solenoid 1, car ran fine no problems, now getting p1343,p1341,p1345 crankshaft position camshaft position, p1349. car is now running lumpy i expect not on cylinder 1&2, i have swapped camshaft sensors to see if problem changed banks but same problem. please advise, car has recently had lpg conversion and has been fine till yesterday. please advise<br />can i add this all started yesterday after my battery went flat and i had to jump start the car.
Submitted: 3 years ago.
Category: BMW
Expert:  Richard replied 3 years ago.

Hello and welcome to justanswer.com

 

Those are cylinder missfire codes for cylinder 1 and 2. It can be as simple as a faulty ignition coil or a burnt cable from the coil to the plug. You can swap out those coils to another cylinder and clear the codes to see which codes return. You may want to swap them to the other bank as continued misfiring can cause cat converter damage.

 

Cylinders 1 ... 4 are on the right-hand side of the car as seen looking forward from the drivers seat (beginning with cylinder no. 1 at the front end).
This is referred to as Bank 1 .
Cylinders 1 > 4 front to back.

Cylinders 5 ... 8 are on the left-hand side of the car as seen looking forward from the drivers seat (beginning with cylinder no. 7 at the front end).
This is referred to as Bank 2 .
Cylinders 5 > 8 front to back.

Customer: replied 3 years ago.
i have cleared the codes and as soon as i run the car only on petrol it seems to run fine, changing to lpg i am getting the problem on cylinder 1 + 2 only firing on 6, i have my ecu wired directly to the jump point under the bonnet, i am considering whether it is possible i have fried the lpg ecu or battery problem has wiped programming. I changed the pipes from 6mm to 5mm bore as recommended by manufacturers so the amount of gas being fed is a little less but wont autocallibrate system as revs drop too low as only firing on 6 cylinders. still getting the crankshaft / camshaft error but only when running on gas. please advise

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