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E34 (1989 - 1995)

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  #1  
Old 09-14-2014, 06:14 PM
oLDgREY525 oLDgREY525 is offline
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Location: Los Angeles, CA
 
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Mein Auto: 91 525i
Question I need some answers

My 91 525i no engine mods an automatic transmission is acting strange at about 55mph, the speedo begins to fluxuate up and down between 25k & 35 k rpm with the gas pedal at about half way open ! I can feel a slight surge in speeds but nothing major. I'm trying to find out what the problem is so i can get it fixed before it gets major, can anyone help me out with some direction of where I can find a solution to this ?
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  #2  
Old 09-14-2014, 08:24 PM
MeNoo MeNoo is offline
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Mein Auto: 1990 BMW E34 525i
Does it sound like it's actually revving like that?
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  #3  
Old 09-14-2014, 08:49 PM
oLDgREY525 oLDgREY525 is offline
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No it doesn't change in tone
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  #4  
Old Yesterday, 05:37 PM
MeNoo MeNoo is offline
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Mein Auto: 1990 BMW E34 525i
I think the tacho is bad electrical (stripped wire somewhere, etc) and the variations in speed are you freaking out about the tacho. TBH if it's not that, you have something strange going on.
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  #5  
Old Yesterday, 06:25 PM
TexHun TexHun is offline
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Location: Texas somwhere around Waco
 
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Mein Auto: 87 528e, 94 540i/6
Yah Like MeNoo said, its most likely a problem with your dash cluster. You could try getting another one from the junkyard and swapping it. These dash clusters aswell as the older model bimmers were common problems and would start acting up or just quit working altogether but nothing hazardous would ever happen to your car.
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Last edited by TexHun; Yesterday at 06:26 PM.
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  #6  
Old Yesterday, 06:39 PM
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E34ZombieHunter E34ZombieHunter is offline
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Location: Lillington NC
 
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Mein Auto: 95 540i B/B
The capacitors in the cluster go, you can fix it if you can solder well, or just find a new cluster.

If your speed moves a little as well this is not a cluster issue.
You said you feel a surge in speed as the tach moves, correct?

Usually there are other issues once the cluster goes, like incorrect fuel gauge, the speedo not working when cold, or hot.
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  #7  
Old Yesterday, 07:15 PM
MeNoo MeNoo is offline
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Yeah, I think the speed is a like a placebo...
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