2.0 Engine sometimes lack of power

K

kennyv

Member
Hey.

I have a 2.0 engine with 108000km at the clock. The engine is normally smooth and quite powerfull but sometimes
when i accelerate in second gear it feels like something is pushing the breaks. I push the pedal to the metal :) but it revs very slowly
like it is in some kind of precaution mode. It doesn't happen very much only when i give it a push in second gear.

Someone who recognizes this?
 
with that sort of milage maybe you have a siezed caliper? go for a spina n check if any of your alloys are hot/ red!
 
Yeah, that's very common on the 2.0...

It's all down to part of the manufacturing process for that particular engine, seems somewhere along the line they left out 2 cylinders and about a litre of capacity ;)
 
Tweed said:
Yeah, that's very common on the 2.0...

It's all down to part of the manufacturing process for that particular engine, seems somewhere along the line they left out 2 cylinders and about a litre of capacity ;)
Click to expand...

OOOO ouch, never saw that one coming :fuelfire: . :evil:
 
U read my mind,tweed...lol
didnt take someone long to point that out :rofl: :thumbsup:

Seriously,as said,possibly a sticking caliper?
 
Does it just feel a bit flat or stuttery? Coil packs/oxygen sensors a problem on the 2.0?

Does it help if you put in higher octane super unleaded fuel?
 
The callipers are fine as it just happens very rare. I have put ron 98 in it and the problem didn't occur anymore.
But like i said it happens very rare so it could start next week or next month :)
I don't think the coils are bad because the car runs very smooth except that sometimes when you accelerate very hard it feels that i have lost
all the horses under the bonnet :P and sometimes it just launches like a rocket :) Could it be some kind of pressure loss or something?
Last month the car had been services under warranty because it had a leaky valve gasket, then it happened all the time this loss of power.
 
Tweed said:
It's all down to part of the manufacturing process for that particular engine, seems somewhere along the line they left out 2 cylinders and about a litre of capacity ;)
Click to expand...

Did someone not say sometime that - "men buy big fast cars to compensate for something that's missing."
kissmyarse.gif
 
MalcZ4 said:
Tweed said:
It's all down to part of the manufacturing process for that particular engine, seems somewhere along the line they left out 2 cylinders and about a litre of capacity ;)
Click to expand...

Did someone not say sometime that - "men buy big fast cars to compensate for something that's missing."
kissmyarse.gif
Click to expand...

May well be correct in the above statement, however, the guys that buy big fast cars have bigger,,,,,,,,,wallets,,,,,,,,,,,,

I actually thought I was going to £82,000,000 million richer tonight , alas it was not to be , always next week £ 100, 000, 000 :D
 
Seriously,,,,,,In my young years spent alot of time working on cars , engines in todays cars frighten me , however ,the ignition process is the same. Here in central Scotland the Autumnal air is very damp , I feel the dampness affects my car , showing up as a flicker in the revs , once the engine heats up its fine , suspect its a future coil pack problem . The engine dying when accelerating hard ;its either getting to much fuel, not enough or insuffienct air to enable combustion,
 
Mine is fine under power but always had a nagging feeling about the idling. It just seems a little rough. It seem to studder for split seconds. I've checked the filter and the air intake sensor and all is clean. Is this normal and I'm just being paranoid?
 
feel a lot of those do you chrismann85? :poke:

I'd go with a sensor given the mileage & higher fuel making it go away.

If you can, try and get it hooked up to a code reader just in case it's throwing codes already. Could save you a lot of time.
 
Gerry said:
Seriously,,,,,,In my young years spent alot of time working on cars , engines in todays cars frighten me , however ,the ignition process is the same. Here in central Scotland the Autumnal air is very damp , I feel the dampness affects my car , showing up as a flicker in the revs , once the engine heats up its fine , suspect its a future coil pack problem . The engine dying when accelerating hard ;its either getting to much fuel, not enough or insuffienct air to enable combustion,
Click to expand...

I always understood that, with normally aspirated cars/bikes they actually ran better in damp air, may be different with fuel injection though.

If the engine dies when accelerating hard - are you not hitting the rev limiter?
IDunno.gif

Does the Z4 have such a thing?
 
No i'm not hitting the limiter as it happens around 3500 RPM.

It has been a month that my engine has been repaired at the dealer. It had a leaky valve gasket. So they replaced the rubber seal. When i got home
i checked their work and noticed that the rubber positioner of the seal (the halve rubber cirkel) at the front was sitting half way in :headbang:
So i must say i don't have much trust in them and that from a bmw dealer. Now i had a rattle when i started the engine, i have found that it was a loose cable slamming against the heat shield, so solved. But during my inspection i noticed a bolt that was hand loose (photo) so the dealer had forgotten to tighten it after the replacement. The seal had a gap with the engine that i could put i screwdriver between it :o . So i tightened it and the engine runs much smoother, i doesn't bounce in rmp at cold start running idle, and it has a much nicer sound i think :) Maybe it's between my ears.
I've posted the clips before and after. I didn't notice a lack of power so could this be the solution, maybe a compression loss at the gap???

DSC00467.jpg


Clip before
http://s950.photobucket.com/albums/ad349/Kenny_20/?action=view&current=MOV00456.mp4

Clip after
http://s950.photobucket.com/albums/ad349/Kenny_20/?action=view&current=MOV00466.mp4
 
Mine does something similar, when you floor it in 2nd or 3rd, its like theres some hesitancy before the revs build up ...... I'm convinced its just the way bits chipped ...... I'm forever screwing with the maps on my race bike and when its just a little off somewhere, the same hesitation.

Short of fitting something like a power commander (dont even iknow if they are avaialble for cars) I dont think there's much you can do - after market chips are ok but they are so generic that they are as likely to produce more problems than what they fix - without a dyno theres not much point.
 
chrismann85 said:
have you tried resetting the throttle?

http://www.z4-forum.com/forum/viewtopic.php?f=32&t=195
Click to expand...

Yes i have tried it a few months ago but didn't help. But for now i have not experienced this loss since i tightened that bolt. So i keep fingers crossed :)
 
I have a 2003 z4 2.0 can it has recently been acting up. when i start up the engine sometimes, not always, the car starts shaking for 10 seconds and then dies down. thsi happens several times in a row. the eml, check engine, and triangle light all turn on. the problem can be several things. any ideas or similar experiences?
 
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