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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 04-30-2010, 02:32 PM
louiethelip79 louiethelip79 is offline
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Mein Auto: 1997 528i
Hello to all! I need some serious help!!!

Ok, so this is my first post, but I've been checking this site for some time now. I've got myself a 97 528i, and I truly love the car. Quite the change from the Honda CRX i drove previously. However, I have been having a heck of a time figuring one problem out, and i'm at my wit's end! After the car has sat for at least four hours, especially overnight, the car has difficulty starting. Sounds easy right? Well, here's what I've done so far in my quest to start on the first crank, every time. Replaced the cam and crank sensors, and the coolant temp sensor. Replaced the plugs and plug boots. Replaced the intake manifold gasket, cleaned out the MAF (with a proper cleaner to ensure no residue left over), cleaned out the ICV and CCV, and replaced the hose that goes from the CCV back to the dipstick. I am running a K & N drop in filter. I have replaced the fuel pump (Leaking), the fuel pressure regulator and the fuel filter. All these changes have made a huge difference, seeing how the vehicle was running really rough with low power and a loppy idle. But the problem persists. It is not throwing a single code. Using our Matco Determinator Scantool, I have run several scans, and took a look at the real time data stream, there are a few things that I think are telling me something, but my knowledge is limited as to how to interpret the information. All seems to point to bank 2. The STFT sits at 96%, hardly fluctuating, regardless of throttle position. The same applies to the O2 values, also around 92%. So there it is, my nightmare. I hope someone has an answer!!!
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  #2  
Old 04-30-2010, 02:47 PM
Waveho Waveho is offline
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Need to be more specific--does the engine turn over but fail to start? Or just keep cranking with no start? Or cranks once and gives up?
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  #3  
Old 04-30-2010, 02:48 PM
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Dmendez Dmendez is offline
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How about the fuel injectors.
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  #4  
Old 04-30-2010, 03:34 PM
E39er09 E39er09 is offline
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I'm assuming you have checked the battery before replacing all the goods you have mentioned. Does your alarm go off randomly? That was what was draining my battery even after I fully recharged the battery at the shop. I changed my alarm siren and that solved it. Loose battery cables also contributes to the problem.
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  #5  
Old 04-30-2010, 05:54 PM
mrpumpk1n mrpumpk1n is offline
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did you "prime" your fuel pump when you replaced it?
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  #6  
Old 04-30-2010, 07:47 PM
therealsuv therealsuv is offline
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If it cranks and no start, I had the same issue and did all the same things you did. Finally, I replaced the ignition switch and have not had a problem since.
Have you replaced the fuel pump relay?
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  #7  
Old 04-30-2010, 10:15 PM
SoCaLE39 SoCaLE39 is offline
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I know this probably isn't your problem however it could lead to some problems. Ditch the K&N filter. The oils are known to make the MAF sensor faulty.
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  #8  
Old 05-04-2010, 04:36 PM
louiethelip79 louiethelip79 is offline
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Mein Auto: 1997 528i
Hey there guys! Thanx for the quick reply! I'm going to answer your questions one at a time. Waveho: The engine will turn over and crank, but will take at least 3 to 8 tries before it fires up. After that, runs like a champ. Seems like it could have much more power though. Demendez: As far as the fuel injectors, I did a rebuild on the seals when I was checking for a leaking fuel injector. Therealsuv: Now the ignition switch was something I hadn't considered, I figured that if it's cranking, then the switch was operational. And the fuel pump relay has also been checked, proper coltage in and out. SocalE39: Thanx for the advice, and I took that into consideration. So before I installed it, I cleaned all the oil out of it. I'll never go back to a stock filter!
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  #9  
Old 05-04-2010, 05:54 PM
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CoreyMNK CoreyMNK is offline
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HAHAHHA i love ur sig! Um. OP, I'm sorry I'm not much help, but Pumpkin's signature made me laugh out loud.
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  #10  
Old 05-04-2010, 06:30 PM
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Quote:
Originally Posted by SoCaLE39 View Post
I know this probably isn't your problem however it could lead to some problems. Ditch the K&N filter. The oils are known to make the MAF sensor faulty.
While I'll agree they seem to foul the MAF prematurely I believe it's a myth that they cause them to go bad. Simple regular cleaning cures this issue. I'm at 140k now with my original MAF and have been running either K&N or Conforti oiled CAI filter since I bought the car with 80k mileage.

Anyways op. Goodluck with your issue.
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  #11  
Old 05-04-2010, 06:39 PM
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paferri paferri is offline
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Mein Auto: '98 Alpine White E39 528i
agreed about the K&N. I Have been using it for 2 years now with no issues at all, and i do feel a slight difference compared to stock...not in my head. As a matter of fact, last time I cleaned the MAF a few months ago it was clean as a whistle.

The problem with the K&N's is when you over saturate them with the oil, it has to be literally dripping when you put it back in the housing, and if that's the case, you deserve fouling your MAF.

if you follow the directions in cleaning the filter, and applying a light even coat and giving the oil proper time to set before installing it back in the air box, you'll be fine.
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Last edited by paferri; 05-04-2010 at 06:42 PM.
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  #12  
Old 05-04-2010, 06:44 PM
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CoreyMNK CoreyMNK is offline
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I've also been using a K&N filter since I've owned the car (I got it about 80,000 miles ago), and I've had no problems what so ever. I did replace the MAF once after the stealer told me too, and it didn't even fix the problem... So I'm guessing that the MAF was still fine. That was also the last time I ever went to the stealer because the ripped my front bumper off.
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  • Dinan Engine Software
  • Smoked Sidemarkers
  • Smoked Turnsignals
  • Shadowline Trim (Plasti-Dip)
  • Fittipaldi Wheels
  • Muffler Delete
  • Beisan Vanos Seals
  • Umnitza MTech Rear Bumper

2004 Volvo V70R
2005 Nissan Armada SE OFF ROAD
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