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E34 M5 Discussion 1988-1995 Sedan and Touring

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Old 29th March 2005, 19:17   #1
dennis-f
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hii and elcome ;-)
first i would like to saythank you for the nice board here...
anyway.. i have some slight problems.. writing english is one of them.
next problem is...
i have a 3,6 l engine.. and it does not run as smooth as i would like it to..
when i accel. its running VERY well.. but when i deaccel. the engine misfires and makes rumble and thunder.. and when i go straight 80km/h or 100/kmh or even 170 km/h the motor is going unstable... it feels like sitting on the back of at bayliner in high sea...
okey.. i guess noone at all understand my explaining here..
i have renewed plugs distribut. rotor, vacum to the flap, and its working alright..
soooo what?
can it be to much fuel? or need of the same??
i have only a 3,0 bar fuelpump,and a 3,0 bar returnvalve... but it seems like m5 is runnig 3,8 bar??
i would be very happe if someone have had the same prob.
since its a very commen problem among my friends here in denmark..

dennis..
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Old 29th March 2005, 19:27   #2
AlexA
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Re: hii and elcome ;-)
Dennis,
the S38B36 uses a 3.0 bar fuel pressure regulator (according to the ETK), and the 3.8 liter engine uses a 3.5 bar regulator. I don't know about the fuel pump pressures.


Alex
92 M5 Touring
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Old 30th March 2005, 16:54   #3
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Re: hii and elcome ;-)
hmm okey .. thx...
so no one have an idea about what can be wrong..?
what about spareparts like GASKETS??

i need a new head\exhoust
anyone know cheap places for bying parts..??
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Old 30th March 2005, 17:30   #4
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Re: hii and elcome ;-)
Quote:
Originally Posted by dennis-f
hmm okey .. thx...
so no one have an idea about what can be wrong..?
what about spareparts like GASKETS??

i need a new head\exhoust
anyone know cheap places for bying parts..??

Hi!!
If I were you,I would check all the rubber hoses on the intake side. Take of the airflow meter/filter box and inspect the rubber between filter box and intake.

All the best
Sakke
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Old 31st March 2005, 16:42   #5
M5touring reg
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Re: hii and elcome ;-)
dennis-f in Denmark@
contact -Finn Donati- (check member list), he is in your country, he knows
A LOT about the E34 M5 3.6 + 3.8 AND you can explain your problem to him
-på danska-
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Old 31st March 2005, 17:30   #6
dennis-f
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Re: hii and elcome ;-)
Quote:
Originally Posted by M5touring reg
dennis-f in Denmark@
contact -Finn Donati- (check member list), he is in your country, he knows
A LOT about the E34 M5 3.6 + 3.8 AND you can explain your problem to him
-på danska-
nice... thanx a ,lot..
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