Code 1213, Running Rough in Morning

[George M]

You seem to believe that injectors are a maintenance or a PM item. They are not. Bosch injectors for BMW's as a rule will easily go 200k miles without replacement. Mine are original and at 150k miles flow beautifully. Replacing O-rings is recommended if you pull them out. Go ahead and replace them if you want but likely will not resolve the problem.

[632 Regal]

for the injectors go to http://www.fiveomotorsport.com/, really will flow the same as stock and the engine management will set the fuel curve anyways.

in reading through this post I havent seen that you have replaved the valve cover gaskets, not the ones for the plastic covers but under that, those tend to leak.

Have you changed the boots between the coils and plugs yet?

Check carefully along the air intake system for something not fitting correctly, Mine had a leak on the bottom side which took a bit to finally find.

[SharkmanBMW]

I have a 4 litre M60 and last summer had major rough idle until warmup..... Winfred hit the nail on the head in my case with his tip..... "have you done the pcv plate on the back of the intake?"

[4byr]

I have a 4 litre M60 and last summer had major rough idle until warmup..... Winfred hit the nail on the head in my case with his tip..... "have you done the pcv plate on the back of the intake?"

PCV plate has been replaced. I verified that the resistance measurement on the IAT and TPS and idle speed control valve are correct to include the incoming voltage. I verified the incoming voltage on the AFS but Bentley does not indicate what the test resistance should be on the AFS and on what terminals. I have a 4 wire connector for DME 3.3.1 on the AFS. Does anyone know what the resistance should be on this by terminal?
When I removed this to inspect the seal and rubber there were no signs of damage. When I connected the AFS with the connector while disassembled I witness no glowing of the "hot film". Does this glow like on the "hot wire" style used on DME 3.1?
The answer to the gasket issues and boots is that all have been inspected and there are no apparent leaks.

What is the function of the idle speed control valve? I feel this buzzing and have checked incoming voltage and the resistance of the contacts are per specification. Does this merely open and close or does the buzzing mean it is spinning at a variable speed forcing air into the intake manifold. When the motor is cold does it merely rotate open or does it spin freely and force air into the manifold?

The only reason I was even thinking of injectors is with the thought that I could perform some PM while the manifold was off "again".

Thank you to all for the help,

Rich

[4byr]

for the injectors go to http://www.fiveomotorsport.com/, really will flow the same as stock and the engine management will set the fuel curve anyways.

in reading through this post I havent seen that you have replaved the valve cover gaskets, not the ones for the plastic covers but under that, those tend to leak.

Have you changed the boots between the coils and plugs yet?

Check carefully along the air intake system for something not fitting correctly, Mine had a leak on the bottom side which took a bit to finally find.

[4byr]

PCV plate has been replaced. I verified that the resistance measurement on the IAT and TPS and idle speed control valve are correct to include the incoming voltage. I verified the incoming voltage on the AFS but Bentley does not indicate what the test resistance should be on the AFS and on what terminals. I have a 4 wire connector for DME 3.3.1 on the AFS. Does anyone know what the resistance should be on this by terminal?
When I removed this to inspect the seal and rubber there were no signs of damage. When I connected the AFS with the connector while disassembled I witness no glowing of the "hot film". Does this glow like on the "hot wire" style used on DME 3.1?
The answer to the gasket issues and boots is that all have been inspected and there are no apparent leaks.

What is the function of the idle speed control valve? I feel this buzzing and have checked incoming voltage and the resistance of the contacts are per specification. Does this merely open and close or does the buzzing mean it is spinning at a variable speed forcing air into the intake manifold. When the motor is cold does it merely rotate open or does it spin freely and force air into the manifold?

The only reason I was even thinking of injectors is with the thought that I could perform some PM while the manifold was off "again".

Thank you to all for the help,

Rich

[winfred]

it doesn't spin or pump air, some open and close quickly (many times a second) to meter air past the throttle plate and others attempt to maintain a certain amount of opening like a mini throttle to hold a specified idle speed

What is the function of the idle speed control valve? I feel this buzzing and have checked incoming voltage and the resistance of the contacts are per specification. Does this merely open and close or does the buzzing mean it is spinning at a variable speed forcing air into the intake manifold. When the motor is cold does it merely rotate open or does it spin freely and force air into the manifold?

[4byr]

it doesn't spin or pump air, some open and close quickly (many times a second) to meter air past the throttle plate and others attempt to maintain a certain amount of opening like a mini throttle to hold a specified idle speed

Winfred,

Thank you for your knowledge!

Do you know how to test the AFS? I don't know what the resistance should be. The connector has the voltage required but I'm not sure the AFS is functioning. Is there a test on the 4 wires? I see a test for the six for the 3.1 DME but not the 3.3.

Thanks again!

[winfred]

to really see anything you need a graphing multimeter to see the output and how smooth it rises and falls when you rev the motor, then you need to know what it's supposed to be, test info for hard parts is generally hard to find

Winfred,

Thank you for your knowledge!

Do you know how to test the AFS? I don't know what the resistance should be. The connector has the voltage required but I'm not sure the AFS is functioning. Is there a test on the 4 wires? I see a test for the six for the 3.1 DME but not the 3.3.

Thanks again!