BMW 1990 535 rough idle and missfires under load - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 12-23-2008, 05:16 PM
n00b
 
Join Date: Dec 2008
Location: Missouri
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
louidesc is on a distinguished road
(Thread Starter)
BMW 1990 535 rough idle and missfires under load

Just bougt this 535 6 months ago...run great untill couple days ago.

I can starts pretty when cold, but the idle is rough, sounds like its running on 5 cyl. Tap on the gas litely and goes back to 6 cyl .

I changed the plugs, put a can if inj cleaner, still same problem.

I have been driving the car last few days, and it drive fine under light load, it's when i push on the trottle more and when it get under load, then it missfire and i loose most of the power.

Any idea...?

PS. i changed the gas filter and air filter 2 moths ago.
louidesc is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 12-23-2008, 10:38 PM
n00b
 
Join Date: Dec 2008
Location: concord
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
robert52 is on a distinguished road
i have the same problem with a 2000 540i v8 and nobody can find yhe problem i think mine is elec
robert52 is offline  
#3 (permalink) Old 12-24-2008, 01:50 AM
n00b
 
Join Date: Sep 2007
Location: Ca
Posts: 33
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
emiliomax is on a distinguished road
Is your check engine light on? Check your distributor cap and rotor. Also, check your wires and coil. One other possibility, the alternator is malfunctioning. Not producing enough juice. Sounds weird, but it was happening to me. Replaced the alternator and the problem was fixed. Worth checking out
emiliomax is offline  
#4 (permalink) Old 12-28-2008, 04:51 PM
n00b
 
Join Date: Dec 2008
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
leegardner is on a distinguished road
Hi I have a 540 V8 1994. And guess what I got the same problem. Done same changed plugs. But problem still there. Had a Check Control on dash board. Can run fine when parked up night before. It was the next day the problem began !!!!. has any one solved it yet and wy it happened !
leegardner is offline  
#5 (permalink) Old 12-29-2008, 08:40 AM
Help from over the pond
 
marti5's Avatar
 
Join Date: Sep 2008
Location: IPSWICH. U.K.
Posts: 3,242
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
marti5 is on a distinguished road
Quote:
Originally Posted by robert52 View Post
i have the same problem with a 2000 540i v8 and nobody can find yhe problem i think mine is elec
You are a little different with the V8, have you changed your fuel filter? also the V8 engine sits a a slight chamber, leaning back, check for oil around the spark plugs esp the rear two on both banks, then there's the PCV valve which is bolted to the rear of the engine on the in take manifold ( these do go sometime guaranteed), after that there's the camshaft sensor or crankshaft sensor, then there's the MAF, Well I hope ive given you somewhere to start.

VELVET BLUE UK INDIVIDUAL , IM THE LAST
UNITED WE STAND DIVIDED WE FALL

I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!
marti5 is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 5-Series (E12,E28, E34, E39, E60)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
my 1990 535 is overheating at idle luckyguy98 5-Series (E12,E28, E34, E39, E60) 6 01-20-2009 06:43 AM
Rough idle & jumping idle ///M Power 3-Series (E36) 4 12-22-2008 06:20 PM
Rough idle 525i 1990 fighter73 5-Series (E12,E28, E34, E39, E60) 0 09-26-2008 10:04 PM
E28 535 Weird Idle bimsupreme 5-Series (E12,E28, E34, E39, E60) 4 01-12-2005 08:14 PM
Rough Idle? streetdreams 3-Series (E36) 8 11-23-2004 08:26 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome