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Juddering in first gear + engine light on

Discuss problems you have had or are having with your Z4
Mike6
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Juddering in first gear + engine light on

Post by Mike6 » Wed Sep 26, 2018 6:06 pm

There have been a number of posts on here about petrol quality issues. A general view seems to be that you shouldnt use supermarket petrol but a quality product from suppliers such as Shell or Esso who spend a fortune on fine tuning their products with cleaning additives etc. Some have reported running problems with supermarket fuel that disappears when you fill up with better fuel.
It probably wouldnt harm to add some redex next time.

kowsmou
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Juddering in first gear + engine light on

Post by kowsmou » Wed Sep 26, 2018 8:54 pm

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Last edited by kowsmou on Fri Oct 19, 2018 10:51 am, edited 1 time in total.

cookie_190
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Juddering in first gear + engine light on

Post by cookie_190 » Fri Sep 28, 2018 8:18 pm

Hi Tuga and Kousmou,

I have just bought an 2007 Z4 2.0L and am having the exact same problem. 1st it was the emissions light, private dealer sent me to his indy who said the code was for the cat converter. So they replaced that. But light back on again within a few days. Code is again pointing to the exhaust system but the stats are all bang on where they should be.

Its also juddering in 1st when the engine is cold. I've written to the dealer to reject the car (waiting for response) but i'd prefer to have this problem go away if possible.

Think I'll give the engine restore thing a go, the juddering in 1st is really quite annoying, any more suggestions? Tuga did you get yours sorted?

Z4Tuga
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Juddering in first gear + engine light on

Post by Z4Tuga » Fri Sep 28, 2018 9:12 pm

kowsmou wrote: Wed Sep 26, 2018 8:54 pm I tried some more 'premium' petrols for a few fills but it didn't make a difference. Fuel isn't the cause of the problem I'm certain of that.

These cars are also prone to oil leaking from valve cover gasket and vacuum pump seals. You will notice oil on the left hand side of the engine in the little silver tray and on the bottom back of the engine block, respectively. Neither are expensive to fix really. The vacuum pump will also drip oil onto the exhaust and you'll smell it so that's also a sign it needs doing.

I don't know much about this 'engine restore' stuff. He said it's american and cuts emmisions significantly, amongst other things. I looked it up online earlier and it's £29 from eBay. I'll keep you posted as haven't actually tried it yet but he swears by it.
I'm starting to suspect that you are one of the previous owners of my car! :P
I've had the car inspected by an independent specialist today and I have the exact same oil leaks you described. I've read in the forum that they are quite common but it was still interesting as the mechanic was showing them to me, what you wrote kept coming back to my mind.
I'm now in the process of having these repairs agreed with the dealership.
The mechanic also noticed the juddering in 1st gear, so that`s definitely not me being newb with the clutch. He will investigate this further and I will report here any findings.
In the meantime the light has not come back, but I have done less than 100 miles since it was reset, so can't really tell. I will update the post if it does.

cookie_190
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Juddering in first gear + engine light on

Post by cookie_190 » Sun Sep 30, 2018 3:26 pm

Good luck with it, yes please let me know the outcome of your juddering in 1st problem!

Cheers

Gjm91
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Juddering in first gear + engine light on

Post by Gjm91 » Tue Oct 16, 2018 1:30 pm

kowsmou wrote: Wed Sep 26, 2018 8:54 pm I tried some more 'premium' petrols for a few fills but it didn't make a difference. Fuel isn't the cause of the problem I'm certain of that.

These cars are also prone to oil leaking from valve cover gasket and vacuum pump seals. You will notice oil on the left hand side of the engine in the little silver tray and on the bottom back of the engine block, respectively. Neither are expensive to fix really. The vacuum pump will also drip oil onto the exhaust and you'll smell it so that's also a sign it needs doing.

I don't know much about this 'engine restore' stuff. He said it's american and cuts emmisions significantly, amongst other things. I looked it up online earlier and it's £29 from eBay. I'll keep you posted as haven't actually tried it yet but he swears by it.
Hi Kowsmou-did you try the engine restore stuff.- I have a 2.0 l and had the emission light come on recently - it came on just at the end of a long run but had been doing lots of stop start driving just prior to that . AA came out and it was the cat efficiency code - AA cleared codes and said to run some fuel cleaner through the system but did say as these cars get older they are prone to throwing up these codes when there isn't actually an awful lot wrong . I put a bottle of cataclean in the tank and not seen the light come on but only done about 50 miles since putting the cleaner in . would be interested to see if the engine restore stuff has made any difference.

cheers
E89 2.0 i S Drive M Sport
TT MK1 Roadster
RR Evoque
Now gone E85 2.0 SE

kowsmou
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Juddering in first gear + engine light on

Post by kowsmou » Thu Oct 18, 2018 12:11 pm

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