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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > E90 335i Poor idle and ticking noise



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      04-16-2015, 06:16 AM   #1
NRudy
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E90 335i Poor idle and ticking noise

I'm curious if anyone has ideas about what could be causing this.

I purchased the car two weeks ago and 1 day after I got the engine management warning reduced power. After turning the engine off and back on all was fine, once again it happened same deal, reduced power engine off and one car turns over fine, full power. I got the engine checked by a garage (random one as i only needed the codes) who wiped the codes as he said they were not active codes he didn't write them down and couldnt recall them ....., Since then no codes have come up at all.

However now this there is a really loud ticking sound on cold starts until the engine warms up, the there is a loud ticking on acceleration and at times the car idles at 7/800 rpm and not the normal 600 for no apparent reason at all. on start up at times it coughs before firing up also. At times when it idles the engines seems to wobble for no reason even though the revs look stable. I at times have a really strong smell of petrol (i use shell Vpower) which also seems to another concern.

A little back ground of the car might off a little more insight. The car has done 67k miles 1 lady owner, parked in a garage and for the last 3 years only did 9k. The car was serviced by BMW had a new water pump in Feb of this year. Just had an oil change done but in addition i don't think any other maintenance items were changed over the 3 years (other than 3 oil changes) due to the low mileage driven.

As no codes are coming up I'm struggling to know where to start, I have BMW warranty upto 100k miles (paid for monthly) and a third party warranty for 6 months but as no codes are coming up it seems I cant get any assistance with it.

Im also stuck with a exhaust flat rattle which seems to be causing the exhaust to rasp on acceleration then gargle when the revs come down which seems impossible to fix also.

Any tips on how i should go about this?
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      04-16-2015, 09:51 AM   #2
Vish8895
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What's she like on start up? Any long cranks? Common issues with the 335i that may be worth mentioning are; Coil packs, injectors, caked intake track and the dreaded HPFP (high pressure fuel pump).

Can't say much more myself but have a look at those areas and see if they seem similar, although the fact you aren't getting any codes is confusing.
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      04-16-2015, 10:20 AM   #3
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The cranks seem to be long on occasion, when I did get the first diagnostic done It had a few codes up but he wiped them over a week ago and nothing at all is coming up now. the codes I saw were something about Vanos and Fuel pump low pressure.

Its baffling me, I think I might run it in to BMW end of the month and get them to look over it as there is definitely something wrong but the car seems to be playing games.

No further engine management lights or anything its simply ticking loud on cold start and acceleration, long cranks and idling high for seemingly no reason according to the diagnostic.
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      04-16-2015, 07:19 PM   #4
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Order of things to check and report by to us:

1) is your OFHG leaking? (Do you see engine oil on the front of your engine? Like a stream of it)
Possible causing the ticking.
2) is the ticking metallic or electrical?
3) get a borescope of your intake ports? (Let's see how bad they are) might need a walnut blast. Very important.
4) consider replacing plugs and coils....all of them.
Regardless let's just rule it out.
5) what had are you using and from what pump?
6) vanos solenoids clean and swap.
7) BG44k or Techron Concentrate in 2 tanks back to back (injector cleaner)
8) full adaptation reset. Buy a USB to obdii cable. Invest in it.
9) if you are experiencing long cranks....then its the HPFP....not LPFP.
10) don't ever erase codes, even not present codes before writing them down.

Borescope first.

DN
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      04-16-2015, 09:09 PM   #5
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If you have a warranty, use it. No code doesn't mean you can't get it serviced, especially if the idle is erratic.

Could be a host of things, top of the list being vanos solenoid, an ignition coil, etc, etc.
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      04-17-2015, 05:09 AM   #6
Vish8895
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Quote:
Originally Posted by NRudy View Post
The cranks seem to be long on occasion, when I did get the first diagnostic done It had a few codes up but he wiped them over a week ago and nothing at all is coming up now. the codes I saw were something about Vanos and Fuel pump low pressure.

Its baffling me, I think I might run it in to BMW end of the month and get them to look over it as there is definitely something wrong but the car seems to be playing games.

No further engine management lights or anything its simply ticking loud on cold start and acceleration, long cranks and idling high for seemingly no reason according to the diagnostic.
On the occasions it does give long cranks, is it similar to this:



?
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      04-17-2015, 06:19 AM   #7
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Vish, my long cracks in comparison are not that long at all. they last around 1-2 seconds then it fires up.

For instance like today the crank was normal, more or less instant, the ticking / rattle was still there but it idled normally and when left idling after it warmed up sounded perfectly normal.

When accelerating last night i wound down the window to simply listen. on acceleration i could hear the ticking noise then when it was decelerating around 2-3k rpm i got like a fizzing sounds and as it dropped the exhaust gargled. I feel i have lost power from 2 weeks ago but again still no codes at all.

I agree with the code erased thing, i didnt ask him to do it, he just did it and i was like what did they say at which point he looked at me puzzled. i got it checked by another garage after this and they simply said weve driven it cant find fault and there is no codes at all so we cant find anything.

I know im not imagining it, the startup the idle the ticking noise all shouldnt be there. the exhaust rattle is the flap which seems to be loose and is causing the sound to change constantly and rattle when the revs drop.

All in all it sounds like quite an expensive fix especially for a car ive had for 16 days which i am not happy about at all.
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      04-17-2015, 07:12 AM   #8
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If you add the exhaust rattle to the picture if may be a turbo problem.
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      04-17-2015, 07:23 AM   #9
NRudy
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I was thinking wastegate or turbos all along, but then all the other things made me think it could be something else.

Im really hoping BMW can diagnose something even if it hasnt got to the point its throwing codes everywhere yet.
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      04-17-2015, 07:40 AM   #10
Vish8895
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Hmm sounds interesting. Glad that it doesn't appear to be HPFP though (one less for the count!).

I'll stay subscribed to find out what BMW say!
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      04-17-2015, 10:37 AM   #11
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Well I have it booked in for Wednesday at a whopping 102p/h but ill have more info following that so ill keep you posted.

Just another note, driving home this evening on the motorway had it in DS mode, accelerated to 70ish not really hard either and boom engine management again. I've never been so happy to see that as now I know when BMW look at it, the code will be stored so they will have an idea of what's going on.

Strange point was the car actually felt a lot smoother when cruising with the reduced power thing than it does normally.

Last edited by NRudy; 04-17-2015 at 03:19 PM. Reason: additional info
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      04-19-2015, 05:54 PM   #12
Vish8895
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That is very strange. I'm no mechanic and don't claim to be so would be very interested in what they say.

You should get your hands on BMWhat, it's one brilliant app and let's you read codes etc with ease. I scan every week or so to keep my mind at ease haha!
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