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E34 (1989 - 1995)

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  #1  
Old 02-09-2013, 04:12 AM
macster123 macster123 is offline
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Location: yorkshire
 
Join Date: Feb 2012
Posts: 5
Mein Auto: 1993 525i saloon
525i issues!!!!!!

Hi folks,please help! Im at my wits end! My 1993 525i sedan has been a whole lot of trouble for over a year now.My pride and joy is driving (only just) me nuts!Symptoms listed below.
REVS DROP OFF sometimes when idling,It doesnt stall,but settles again after 15 secs or so.If lights are on at the time,they dim as revs drop.this can reccur if i put on the heated rear window or aircon on.This is less obvious when MAF disconnected!
LOSS OF POWER and stuttering accelleration
INJECTORS seem to overinject,as my cat has burnt out after 12 months.


MAF,car is rough at all times but can sometimes run a bit better with MAF
disconnected.
NEW MAF
CRANK SENSOR
CAM SENSOR
CAT (NOW RUINED)
LAMBDA
fitted to solve problems but no joy so far!ANY help would be very much appreciated!
THANKS IN ADVANCE!
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  #2  
Old 02-09-2013, 11:22 AM
BMR_LVR's Avatar
BMR_LVR BMR_LVR is offline
Humble E34 lover
Location: Asheboro, NC
 
Join Date: Dec 2008
Posts: 5,264
Mein Auto: 1992 525i
Welcome.

Check the status of your battery and alternator. You can use a digital volt meter, but I recommend that you take it to a local parts store like Autozone or Advance Auto etc. and have them check both with their machine because it can load test it properly.

Can't guarantee that this is your problem, but given that the lights dim, I think it could be.
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Quote:
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It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold

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  #3  
Old 02-09-2013, 11:37 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
Quote:
Originally Posted by BMR_LVR View Post
Welcome.

Check the status of your battery and alternator. You can use a digital volt meter, but I recommend that you take it to a local parts store like Autozone or Advance Auto etc. and have them check both with their machine because it can load test it properly.

Can't guarantee that this is your problem, but given that the lights dim, I think it could be.
+1 absolutey doesnt hurt
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1995 525iA 250k mi
2003 350Z 88k mi
2014 F-150 0k mi

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