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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 09-16-2012, 02:05 AM
laurieh laurieh is offline
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Location: Dorset
 
Join Date: Aug 2012
Posts: 25
Mein Auto: Z3 1.9i
Engine Tapp and Lumpy Idle issues

Hi all

Have now owned my Zed for a month and loving the comfort compared to my previous MX5 MK1

Just a couple of niggles

1. On cold start i get lumpy idle, once engine reaches norm temp car runs fine with no idle issues.??

2.Again mainly on cold start i get a tapping noise coming from top of engine and kind of gets louder when under acceleration but once engine hits norm temp it goes.??

Could this be a suspect Coolant sensor?


Just to let you guys know what I have done on the car so far:

Oil Filter
New Oil
Fuel Filter
Air Filter
Cleaned the MAF sensor
New inner and outer tie rods

I would like to change the coolant, how easy of a job and what type of coolant recommended.

Also the spark plugs, which type should i go for and what gap/torque setting should i be going with?



cheers all


Z3 1.9i 1999 Topiaz Blue
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  #2  
Old 09-16-2012, 10:45 AM
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Pinecone Pinecone is offline
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Location: Maryland
 
Join Date: Apr 2002
Posts: 10,480
Mein Auto: M Roadster/M3
Lumpy idle may be normal when cold. These engines are a bit highly cammed, even the "normal" ones.
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Terry Carraway

'95 Alpine M3 LTW
'00 Dakar M Roadster
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  #3  
Old 09-16-2012, 11:33 AM
wifesauto wifesauto is offline
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Location: nj
 
Join Date: Jan 2012
Posts: 333
Mein Auto: sloporsche
check the throttle body for coking and IAC if app and look for any vacuum leaks for idle issues. the lifters may be the source of the noise.did you use the right weight oil ?

Last edited by wifesauto; 09-16-2012 at 11:36 AM.
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  #4  
Old 09-16-2012, 01:32 PM
laurieh laurieh is offline
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Location: Dorset
 
Join Date: Aug 2012
Posts: 25
Mein Auto: Z3 1.9i
Quote:
Originally Posted by wifesauto View Post
check the throttle body for coking and IAC if app and look for any vacuum leaks for idle issues. the lifters may be the source of the noise.did you use the right weight oil ?
Hi there, thanks for your info, the recent oil change was carlube 5/40, from the state of the oil filter dont think had been done for a very long while, old oil was quite thick.

Would it be worth changing oil again.

Have checked and cleaned most parts, where is the Idle air control located???

Regards
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  #5  
Old 09-22-2012, 07:47 PM
Stromtech Stromtech is offline
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Location: Victoria BC
 
Join Date: Jan 2012
Posts: 75
Mein Auto: 2004 Z4 3.0 6 speed
You didn't mention your mileage but DISA Valves fail around 50-60K miles and make a ticking noise...if you are at this mileage then it's worth checking the valve. only 2 screws to remove it if I recollect. There are lots of discussions, how to's and pictures if you google disa valve
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