Change ignition coils. BMW 2008 750 li? - BMW Cars & Trucks

Question edited for clarity.
Question moved to model category.

Code : P1351
Make : BMW
Description : P1351 BMW Misfire Cylinder 5 With Fuel Cut-Off
Possible causes :
- 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

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Necessary preliminary tasks:

• Read out fault memory of DME control unit; if necessary, work through test schedules
• Switch off ignition
• If necessary, remove underbody protection.

Installation location:
On transmission housing at bottom right.



Unlock plug (1) and remove.

Release screw.

Withdraw pulse generator (2) from transmission housing.

Installation:
Replace screw.

If it is like earlier models, open trunk, move rug away from back edge, turn socket to unplug and access bulb.

change the 3rd ignition coil clear codes and see if any come back ,if in dout exchange #3 coil with 1 other if your misfire code switches to other cylinder that's a bad coil auto zone has them 65.00

It sounds like you have a cylinder misfire. Could be due to anything from a bad spark plug, ignition coil, to a bad head gasket. As a first step, Get the system scanned by a shop and the OBD will tell you what's failing. Could be a number of other things too, but my guess is a cylinder misfire.

you would need to draw the fluid from the reservoir the fill it with fresh fluid then bleed the brakes until fresh fluid comes threw

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Hi,

I'm Ben and -- hopefully -- I can provide some meaningful assistance.

I recommend a diagnostic scan to confirm my diagnosis of a malfunctioning coil(s).

How to Test and Replace Ignition Coil on BMW 3 Series

The following procedures apply for BMW 3 series (6-cylinders engine) 1992 - 1998 model years. To Test and Replace the Ignition Coil, do the following:

1. Remove plastic engine covers from top of engine by prying off nut covers and removing cover mounting nuts.
2. Disconnect harness connector from coil. Connect multimeter between terminal 15 (+) in connector and ground. (use a digital multimeter for the following test). See Fig.1. below BMW 3 series coil harness
3. Turn ignition on and check for battery voltage. If battery voltage is not present, check wire between terminal 15 and ignition switch. The wiring to terminal 15 (+) of the coil (via the ignition switch) is not fuse protected. Use care when testing this circuit.
4. Turn ignition off.
5. Use a multimeter to test coil primary resistance at coil terminals. (primary coil terminals: 1 (-) and 15 (+), primary coil resistance: 0.4-0 .8 ohms; secondary coil terminal and resistance: NA).
6. Remove coil and inspect coil housing for hairline cracks or leaking casting material . A leaky ignition coil may indicate a faulty engine control module (ECM). Check ECM before installing a new coil.
7. When replacing ignition coils, ensure that the replacement coil(s) are from the same manufacturer containing the same part code numbers. If individual coils with the correct specifications are not available, all coils should be replaced.

replace the busted transistor in your ECU. For Bosch 30011 or 30014 you can use BU323Z transistor for replacement. it´s 100% pin-compatible and released for transistor ignition systems.

This is a pretty common problem. I would change your valve cover gaskets. They run around ~ 50 bucks. If they are bad it will leak oil into spark plug well and cause a misfire. Very known on the 740.. Also if tune was not anytime not too long ago id change spark plugs while you at it. Then clear the computer and if you still get misfire on 8 try changing the ignition coil which is right about the cylinder with cylinder ignition coil 5. clear the computer. if you get random misfire and misfire cyclinder 5 after then its your ignition coil. parts store runs around 100 bucks