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  #1  
Old 06-12-2020, 04:31 AM
Fernando51454 Fernando51454 is offline
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Cold start misfire

04 x5 4.4. I know there are several posts about this issue including intermediate levers. However, my car does not fall in the production range of that issue. Manufacture date 12/03. I live in Florida and as you know itís nit cold here but when I start my car after sitting overnight I get a rough idle. But if I shut it down and wait about 20 seconds and restart everything seems fine. Plugs are new replaced when my valve covers were done about 4 months ago. I had an engine light and the code read random misfire in all but two cylinders but the light went out on itís own after driving a bit and has not returned. I also read that it could be clogged vanos solenoids. I know there are two in each bank for intake and exhaust. Can they be cleaned and new seals put in. Seems like an easy diy unless special tools are need to extract the solenoid. Could it be the coils? I donít know when they were changed last as Iím the second owner and my mileage is at 168k. I find it odd that so many would go at the same time. Another thing an Indy mechanic told me is that it could be a bad injector? A month ago I got an 02 sensor error B2/S1 and replaced it and error code never came back. Thanks for any help on this.
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  #2  
Old 06-12-2020, 06:24 AM
andrewwynn andrewwynn is offline
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Cold start misfire

Cam position sensor is my bet. Do you have a scanner that will show you real-time CPS values? I use foxwell to graph requested vs actual to get a sense of CPS responsiveness. They typical start to fail about 139-150,000 miles.


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Last edited by andrewwynn; 06-12-2020 at 04:48 PM.
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  #3  
Old 06-12-2020, 06:47 AM
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https://www.newtis.info/tisv2/a/en/e...sensor/X2t2BfK

https://www.newtis.info/tisv2/a/en/e...shafts/X62rejm
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Last edited by Doug Huffman; 06-12-2020 at 06:48 AM.
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  #4  
Old 06-12-2020, 07:58 AM
Fernando51454 Fernando51454 is offline
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Thanks Andrew and Doug Iíll have to look into those sensors
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  #5  
Old 06-12-2020, 08:02 AM
Fernando51454 Fernando51454 is offline
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Question is camshaft and crankshaft two separate sensors? Sorry if itís a stupid question
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  #6  
Old 06-12-2020, 05:38 PM
andrewwynn andrewwynn is offline
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They are the same concept but the cam sensors monitor the cam shaft/s and the crank sensor monitors the output shaft of the motor.
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Old 06-12-2020, 05:58 PM
Fernando51454 Fernando51454 is offline
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Thanks Andrew. Should just focus on the cam sensors. I just confused by the other poster who mentioned both when you mentioned just the cam sensors
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  #8  
Old 06-13-2020, 04:13 AM
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I mentioned both because either functions for the other on failure.
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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Old 06-13-2020, 04:17 AM
Fernando51454 Fernando51454 is offline
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Thanks Doug I guess Iíll have to look into all of it. Do you know in total how many of those crank sensors there are. I know thereís four of the cam sensors from what I looked up. Thanks
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Old 06-13-2020, 04:57 AM
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Nope. Not for your engine.
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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Old 06-13-2020, 04:59 AM
Fernando51454 Fernando51454 is offline
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Guess I better to more research lol
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  #12  
Old 06-14-2020, 12:34 PM
Fernando51454 Fernando51454 is offline
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Doug. Says 4 per car

https://www.pelicanparts.com/cgi-bin...rTech%23item13

Last edited by Fernando51454; 06-14-2020 at 12:39 PM.
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  #13  
Old 06-14-2020, 01:46 PM
andrewwynn andrewwynn is offline
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N62 has four CPS. M62 has two.

Only intake cam variable on M62. Crank position plus math = exhaust cam position.
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Old 06-14-2020, 02:11 PM
Fernando51454 Fernando51454 is offline
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Thanks Andrew. my car has an N62 engine from what I know. Can you provide any info on the location of these? I assume all 4 should be changed given the mileage?
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Old 06-14-2020, 03:09 PM
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B6203 Crankshaft Sensor
B6214 Camshaft Sensor 1
B62141 Camshaft Sensor 1, Inlet
B62142 Camshaft Sensor 1, Exhaust
B6224 Camshaft Sensor 2
B62241 Camshaft Sensor 2, Inlet
B62242 Camshaft Sensor 2, Exhaust
B6229 Camshaft Sensor 2

https://www.newtis.info/tisv2/a/en/e...l-transducers/

https://www.newtis.info/tisv2/a/en/e...sensor/X2t2BfK

https://www.newtis.info/tisv2/a/en/e...shafts/X62rejm
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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Old 06-14-2020, 03:12 PM
andrewwynn andrewwynn is offline
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Quote:
Originally Posted by Fernando51454 View Post
Thanks Andrew. my car has an N62 engine from what I know. Can you provide any info on the location of these? I assume all 4 should be changed given the mileage?


They all stick directly out the front of the chain enclosure. About 6-8" off center
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  #17  
Old 06-14-2020, 03:17 PM
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https://www.newtis.info/tisv2/a/en/e...-inlet/UM5cxIN
__________________
Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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  #18  
Old 06-14-2020, 03:49 PM
Fernando51454 Fernando51454 is offline
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Thanks Doug. You already sent Me two of the four links in a previous reply.
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  #19  
Old 06-14-2020, 03:51 PM
BabyUnicornTaco BabyUnicornTaco is offline
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They can be inspected and cleaned before replacing but it is good to get sensor data from a scanner.


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  #20  
Old 06-14-2020, 04:34 PM
Fernando51454 Fernando51454 is offline
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Hey Doug is this link you sent me of an N62 engine? The reason I ask is that Andrew said they are in a different location. On the front of the engine.

https://www.newtis.info/tisv2/a/en/e...-inlet/UM5cxIN
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  #21  
Old 06-15-2020, 07:44 AM
andrewwynn andrewwynn is offline
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My mistake I was thinking about the vanos cylinders! N62 cam sensors in the back.


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  #22  
Old 06-15-2020, 02:48 PM
Fernando51454 Fernando51454 is offline
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Thanks Andrew and Doug. I might have to look at the solenoids also anyway. I read that they also could cause the issue Iím having so Iíll most likely change everything lol
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  #23  
Old 06-15-2020, 02:50 PM
andrewwynn andrewwynn is offline
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You have two banks you can at least switch them left to right


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  #24  
Old 06-15-2020, 03:01 PM
Fernando51454 Fernando51454 is offline
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Andrew if I switch them wonít I just be moving the issue to another bank and still have the problem?
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  #25  
Old 06-15-2020, 03:02 PM
andrewwynn andrewwynn is offline
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You hope so!

That's the best way to know where the prvoem is.


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