BMW REV PROBLEM when idle

[bmw messed up]

Originally Posted by Ivan413

Attachment 30206


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having the same problem again, for two days, car worked fine. no problem but now still getting same problem. revs goes up and down but i noticed that when revs going up, if i move my steering, they come down and after that, they go up again.

i think, possible, the glue come off or anything. question is, when engine suck the air, what would be the pressure like the glue come off, does the engine suck the air really hard??

what is the part called? which attached with maf and idle control valve?? i might as well buy from ebay rather fixing it with glue..

last question, how can i tell, if my spark plugs are going? car start well but sometime when i give gas really hard, it seems like car is braking while moving..

[Ivan413]

The suction is strong and it's probably that the hole Opened up again I'd take that part off the car and go to an auto parts store and see if they can tell you the name of the part so you can find it online or somewhere because that glue is a very short term fix


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[Ivan413]

About that acceleration but feeling like ur braking probably means your o2 sensor has seen its better days or ur injectors can be clogged. Ur o2 sensors can also be the cause of the idle prob as well has the car stalled if you let it idle for a while?


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[bmw messed up]

Originally Posted by Ivan413

About that acceleration but feeling like ur braking probably means your o2 sensor has seen its better days or ur injectors can be clogged. Ur o2 sensors can also be the cause of the idle prob as well has the car stalled if you let it idle for a while?


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car sometime stall when its cold, but after driving few mins, it get fine. when its idle, only revs goes up and down and stay on 800-900 rpm.

injectors, hmm when i drive on lpg (GAS) i feel same problem as driving on petrol.

[bmw messed up]

Originally Posted by Ivan413

About that acceleration but feeling like ur braking probably means your o2 sensor has seen its better days or ur injectors can be clogged. Ur o2 sensors can also be the cause of the idle prob as well has the car stalled if you let it idle for a while?


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yeah possbile, might be o2 sensor but when i fixed the hole from the pipe, it worked fine fore 2-3 days. so possible that because of air suction, the glue couldn't stay on the pipe?

if we talk about hole, how big hole can cause the idle problem?

[Ivan413]

Yeah that hole needs to be fixed pronto glue is not the best to fix holes in rubber which can lead to that loss of power also if the power loss continues it can be ur MAF in limp mode or you might need a new one.


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[bmw messed up]

Originally Posted by Ivan413

Yeah that hole needs to be fixed pronto glue is not the best to fix holes in rubber which can lead to that loss of power also if the power loss continues it can be ur MAF in limp mode or you might need a new one.


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i will have a look tomorrow and try to fix the hole, in the mean time, i will try to find the whole part.
about MAF, my car don't go into limp mode at all, because in limp mode, car wont go more then 70mph but i can hit 100mph from 10mph smoothly.

where is the o2 sensor in my car?

[Ivan413]

I believe bmw's have only one on the exhaust manifold I'm going to see if I can find a DIY on how to change them for you.


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[Ivan413]

I found it for the e36 but its pretty much the same thing http://www.pelicanparts.com/bmw/tech...-O2_Sensor.htm



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[bmw messed up]

isint that quite strange that when i fixed the hole, car was reving good, no problem for 2 days

yesterday,i noticed only 3 times that rev's goes up and down.

today, it almost doing it all the time.

i got a feeling that, the hole is opened. i will glue it and put a proper tape all over the pipe. hope it gets better.

i will put an update tomorrow.