My e46 idling issue

[Petrie]

Good day fellow fanatics, My E46 318i started idling very strange when the car is on normal temperature. It will pick up to 1600 revs, then drop to 1000 revs. Pick up again, drop again. This will happen the whole time. I have googled this and found 1 exact similar thread but the page doesn't open up. Have anyone encountered this and how did you fix this?
Thanks, Petrie

 

[Rotinaj]

Good day fellow fanatics, My E46 318i started idling very strange when the car is on normal temperature. It will pick up to 1600 revs, then drop to 1000 revs. Pick up again, drop again. This will happen the whole time. I have googled this and found 1 exact similar thread but the page doesn't open up. Have anyone encountered this and how did you fix this?
Thanks, Petrie

maf?

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Good day fellow fanatics, My E46 318i started idling very strange when the car is on normal temperature. It will pick up to 1600 revs, then drop to 1000 revs. Pick up again, drop again. This will happen the whole time. I have googled this and found 1 exact similar thread but the page doesn't open up. Have anyone encountered this and how did you fix this?
Thanks, Petrie

maf?

 

[Petrie]

Good day fellow fanatics, My E46 318i started idling very strange when the car is on normal temperature. It will pick up to 1600 revs, then drop to 1000 revs. Pick up again, drop again. This will happen the whole time. I have googled this and found 1 exact similar thread but the page doesn't open up. Have anyone encountered this and how did you fix this?
Thanks, Petrie

maf?

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Good day fellow fanatics, My E46 318i started idling very strange when the car is on normal temperature. It will pick up to 1600 revs, then drop to 1000 revs. Pick up again, drop again. This will happen the whole time. I have googled this and found 1 exact similar thread but the page doesn't open up. Have anyone encountered this and how did you fix this?
Thanks, Petrie

maf?

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I will check the MAF out, thanks

 

[KPM3_30]

Also try and get some diagnostics done to have the codes read, if the MAF check doesn't work.

 

[Donovan2412]

What year is it? If it's an early one with the M43 could be idle control valve.

 

[Petrie]

What year is it? If it's an early one with the M43 could be idle control valve.

2004 Model

 

[Coisman]

Air leak on one of the intake pipes.
Idle control valve.
MAF.

 

[Petrie]

Air leak on one of the intake pipes.
Idle control valve.
MAF.

Thank you for the advice

 

[Nikhil]

Air leak on one of the intake pipes.
Idle control valve.
MAF.

agree with this approach more than likely ICV tho

 

[MoCarCandyBMW]

Sounds like the exact issue i had with my E46 touring.

I picked up that a slight crack on one of the pipes.

 

[Preshen14]

I had an issue with my idle control valve, It was a hectic misfire though.

Other than jumping revs is there no misfire?

 

[Petrie]

Air leak on one of the intake pipes.
Idle control valve.
MAF.

agree with this approach more than likely ICV tho

Thanks, will definitely check it out

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I had an issue with my idle control valve, It was a hectic misfire though.

Other than jumping revs is there no misfire?

No Misfire. Just going up to 1600 rpm, then down to 1000 rpm. The whole time. Up and Down. Up and Down. I am going to test something else this afternoon. Had to quickly go somewhere and switched the AC on. And then it stopped. I want to try this again on my way home and see.