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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 06-19-2015, 08:01 AM
guwop831 guwop831 is offline
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99 540i check engine light flashing when tring to speed over 3000rpm

Check engine light flashes rough idle after 3000rpms changed 02 bank 1 sensor 2 and 1 new plugs oil and radiator flush I also changed coil 1 and 2 car has a possible misfire
1999 BMW 540i 6sp

Last edited by guwop831; 06-19-2015 at 08:30 AM.
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  #2  
Old 06-19-2015, 09:06 AM
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tim330i tim330i is online now
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I moved your question to the E39 5 Series forum, you will get more help in here.
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  #3  
Old 06-19-2015, 09:13 AM
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1. Stop driving that car because a flashing SES means damage is happening (e.g., to the cats) which means $$$$$$$$$.
- Do you smell rotten eggs?
2. Order one of these right now for around 20 bucks:
- Cheapest CAN OBDII scanner on the net that reads DTCs, pending codes, & clears codes
2. Read this thread...
- What to tell newbies who ask why their SES/CEL light is on but who don't have DTC scan codes or why they have a misfire or stumbling, hesitation, rough idle, etc., but who don't post codes from an OBD scanner with their question (1)


When the scanner arrives, read and record the codes.
Then clear them.
Then idle the car (as long as the SES isn't flashing) to see what pops up first.
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See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 06-19-2015 at 06:43 PM.
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  #4  
Old 06-19-2015, 10:08 AM
guwop831 guwop831 is offline
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I check it the codes where p0141 P1341, P1343, P1345,
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  #5  
Old 06-19-2015, 10:18 AM
guwop831 guwop831 is offline
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Bluebee

I just bought the car the guy told me it was a coil so I changed it and the car is the same

Last edited by guwop831; 06-19-2015 at 10:23 AM.
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  #6  
Old 06-19-2015, 11:06 AM
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johnstern johnstern is offline
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You've fixed the heater problem on the downstream O2 on Bank 1 by replacing the sensor.

FYI our cars misfire when they run lean. This means that you are spending money for nothing when you just throw plugs and coils at a multiple misfire problem. The best way is to diagnose by switching first the coil and then the spark plug to a cylinder that is not reporting a misfire. If the fault code follows the component, you'll know what's wrong.

Oil in the spark plug hole is another reason for a misfire. Since you've already changed the plus and coils for cyls 1 & 2, I'll assume you have no oil in those areas.

I'm surprised that you don't have a fault code reflecting a lean condition. Lean conditions are usually the result of vacuum leaks. I'm not very experienced in finding those on a V8 (I'm an I6 guy) but inspection of the rubber intake boots that often tear/crack is a good place to start looking. Removal of these boots is the best way to inspect. Maybe the owner of a V8 will chime in with some other suggestions. Of course, a professional smoke test by an expert BMW shop is the best way.

Last edited by johnstern; 06-19-2015 at 06:58 PM.
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  #7  
Old 06-19-2015, 11:23 AM
ca2014mp2 ca2014mp2 is offline
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+1 well said..
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Series E39 Vehicle code DP63 Model 528ITA Engine M52TU
Body type OTHER Catalog model USA Production date 1999 / 06
Transmission Automatic Steering Left Catalyzer YES

Production FROM : 1998/09/01 TO : 1999/08/31
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  #8  
Old 06-19-2015, 04:12 PM
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Quote:
Originally Posted by guwop831 View Post
I just bought the car the guy told me it was a coil so I changed it and the car is the same
Illogical, at best...

Quote:
Originally Posted by guwop831 View Post
I check it the codes where p0141 P1341, P1343, P1345,
We don't memorize codes so you need to look up what they mean here, and tell us what you found:
- All OBDII diagnostic trouble codes specific to the engine computer of each BMW (1)
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Last edited by bluebee; 06-23-2015 at 07:04 PM.
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  #9  
Old 06-19-2015, 05:01 PM
guwop831 guwop831 is offline
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Still need help
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  #10  
Old 06-19-2015, 05:20 PM
edjack edjack is online now
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P1341 can be caused by clogged cats. Have the back pressure measured. S/b <2 psi at 3000 RPM.
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  #11  
Old 06-19-2015, 06:06 PM
ca2014mp2 ca2014mp2 is offline
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Wait, can you confirm what codes you've fixed. And then update us what you did/ have done.
johnstern - said you have lean conditions due to air leaks-- what have you done to prove or fix this? If you have your scanner then graph the 02 and get leads as to what is going on with your car.
The first biggest lead we gave you was that johnstern suspected is an air leak.. on these cars we get them ALL the time.. you need to start here if you haven't already. But take a second out to update us on what you find. How about some fuel trim readings.. that would go far to help us help you..
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Series E39 Vehicle code DP63 Model 528ITA Engine M52TU
Body type OTHER Catalog model USA Production date 1999 / 06
Transmission Automatic Steering Left Catalyzer YES

Production FROM : 1998/09/01 TO : 1999/08/31
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  #12  
Old 06-19-2015, 06:15 PM
ca2014mp2 ca2014mp2 is offline
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If you have clogged cats as Edjack has mentioned.. then graph your pre cat 02 to your post cat 02 if you see them switching in sync with the post cats -slightly delayed due to the lag and space between sensors.. your cat is toast... if post cat is stead during a closed loop (hot and up to temp) then they should hold steady at @~.78 volts.
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Series E39 Vehicle code DP63 Model 528ITA Engine M52TU
Body type OTHER Catalog model USA Production date 1999 / 06
Transmission Automatic Steering Left Catalyzer YES

Production FROM : 1998/09/01 TO : 1999/08/31
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  #13  
Old 06-22-2015, 01:11 PM
guwop831 guwop831 is offline
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Originally Posted by edjack View Post
P1341 can be caused by clogged cats. Have the back pressure measured. S/b <2 psi at 3000 RPM.
How can I mesure the presure? I took the car to a 4hr drive and made it the car light just blinks like after 3000 and if I pres on the gas but if I ezz on it it's no problem. I also have a cut out to it but it don't really sound that loud its loud but I would expect it louder its be fore the muffler
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  #14  
Old 06-22-2015, 01:13 PM
guwop831 guwop831 is offline
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Originally Posted by ca2014mp2 View Post
If you have clogged cats as Edjack has mentioned.. then graph your pre cat 02 to your post cat 02 if you see them switching in sync with the post cats -slightly delayed due to the lag and space between sensors.. your cat is toast... if post cat is stead during a closed loop (hot and up to temp) then they should hold steady at @~.78 volts.
Is there a video on how to do it?? Need all the help thanks you alot
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  #15  
Old 06-22-2015, 01:31 PM
edjack edjack is online now
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Normal back pressure test is to fit a pressure gauge to the pre-cat bung. Perhaps a muffler shop can do the test for you.

ca2014mp2's post suggests you use a scan tool with graphing function.
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Last edited by edjack; 06-22-2015 at 01:36 PM.
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  #16  
Old 06-22-2015, 02:01 PM
guwop831 guwop831 is offline
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Originally Posted by edjack View Post
Normal back pressure test is to fit a pressure gauge to the pre-cat bung. Perhaps a muffler shop can do the test for you.

ca2014mp2's post suggests you use a scan tool with graphing function.
What would fit in the o2 sensor port 2 do it my self? Where could I get it?
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  #17  
Old 06-22-2015, 02:25 PM
edjack edjack is online now
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Try Harbor Freight.
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  #18  
Old 06-22-2015, 02:52 PM
guwop831 guwop831 is offline
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Tanks for ur help really appreciate it man
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  #19  
Old 06-22-2015, 06:06 PM
ca2014mp2 ca2014mp2 is offline
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What you're looking for, to test the pressure, is a tester like I use a pico tester- you have many other companies to choose from of course. You will need a pressure transducer as well and that setup will give you live pressures in the exhaust. I would suggest that you test with a scanner first. If you are not familiar with any of this you really should think about taking it in. But if you want to learn a scanner is your best starting point.
I often point people to this video (see below).. This guy explains it in a simple educational way to get people away from just tossing parts at a car.. check it out it's good stuff.
If you had a scanner and a good understanding of it you could do a wot test and look at your maf and fuel trims IF the maf is clean and it showed high voltage but not all the way high and your fuel trims were reporting rich .8 or more - that would be a good indicator for a clogged exhaust. Watch your TP to make sure there is not issues too. Also, like I already said that if your secondary 02 followed the same trace pattern of the front 02 your cats are toast... but if they hold steady at like .78volts then they are fine.. either way 20 bucks for a scanner to your phone is the best tool you'll every buy..



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Series E39 Vehicle code DP63 Model 528ITA Engine M52TU
Body type OTHER Catalog model USA Production date 1999 / 06
Transmission Automatic Steering Left Catalyzer YES

Production FROM : 1998/09/01 TO : 1999/08/31
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  #20  
Old 06-22-2015, 08:14 PM
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Originally Posted by bluebee View Post
1. Stop driving that car because a flashing SES means damage is happening (e.g., to the cats) which means $$$$$$$$$.
- Do you smell rotten eggs?
.
There might be a possibility of damage, but no guaranty there is. I had a flashing SES recently...I drove 40 minutes home on the freeway, and it was obvious to me the car was missing on one or more cylinders. When I got home, I read the code and it was for a cylinder 5 misfire. I immediately replaced the coil (I had a spare on the shelf) and was back in business in about an hour. No worse for wear. My car has over 234k miles...still have the original catalytic convertors too.
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  #21  
Old 06-22-2015, 08:32 PM
ca2014mp2 ca2014mp2 is offline
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+1 on rotten eggs... sure fire sign of shot cats.. and dang they are $$$$$$$ on these cars.. my buddy just had his STOLEN off of his truck.. came in at night unbolted them,after, he then asked me why his exhaust is so loud !!!
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Series E39 Vehicle code DP63 Model 528ITA Engine M52TU
Body type OTHER Catalog model USA Production date 1999 / 06
Transmission Automatic Steering Left Catalyzer YES

Production FROM : 1998/09/01 TO : 1999/08/31
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  #22  
Old 06-23-2015, 01:55 AM
Burning2nd Burning2nd is online now
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Multiple Cylinder Misfire With Fuel Cut-off

Why are we looking At cats? why are we talking about that?

I don't want to be captain obvious here but have we looked at the simple more likely items that will cause a random misfire above 3000 grand ?

Like vacuum leak, cam or crank position sensor? Or a clogged fuel filter
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Last edited by Burning2nd; 06-23-2015 at 01:58 AM.
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  #23  
Old 06-23-2015, 07:00 AM
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Originally Posted by Burning2nd View Post
Multiple Cylinder Misfire With Fuel Cut-off

Why are we looking At cats? why are we talking about that?

I don't want to be captain obvious here but have we looked at the simple more likely items that will cause a random misfire above 3000 grand ?

Like vacuum leak, cam or crank position sensor? Or a clogged fuel filter
Heh heh.... there are two kinds of threads where I get so lost, I just slip out the door.

1. When the thread is so deep by the motorheads that I can't keep up with the technical details, and,
2. When the thread follows such illogical thought processes, that I can only shake my head, and decide that the cause is lost (and mankind is doomed to extinction).
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  #24  
Old 06-23-2015, 10:36 AM
guwop831 guwop831 is offline
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Originally Posted by 540 M-Sport View Post
There might be a possibility of damage, but no guaranty there is. I had a flashing SES recently...I drove 40 minutes home on the freeway, and it was obvious to me the car was missing on one or more cylinders. When I got home, I read the code and it was for a cylinder 5 misfire. I immediately replaced the coil (I had a spare on the shelf) and was back in business in about an hour. No worse for wear. My car has over 234k miles...still have the original catalytic convertors too.
I disconted the sensor b4 the cat and drove it and ran good maybe the cat? I took it of the piping but let the electric conetion on





Quote:
Originally Posted by bluebee View Post
Heh heh.... there are two kinds of threads where I get so lost, I just slip out the door.

1. When the thread is so deep by the motorheads that I can't keep up with the technical details, and,
2. When the thread follows such illogical thought processes, that I can only shake my head, and decide that the cause is lost (and mankind is doomed to extinction).
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  #25  
Old 06-23-2015, 11:39 AM
ca2014mp2 ca2014mp2 is offline
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What are you doing? You've had advice from several people trying to help you and yet you don't follow their advice. Why is that? So, I'm curious what do you think will be gained from unplugging the 02 sensor. I'm not of the opinion that will do anything to prove or disprove your problems.
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Series E39 Vehicle code DP63 Model 528ITA Engine M52TU
Body type OTHER Catalog model USA Production date 1999 / 06
Transmission Automatic Steering Left Catalyzer YES

Production FROM : 1998/09/01 TO : 1999/08/31
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