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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 12-29-2010, 02:48 PM
bmw328i98 bmw328i98 is offline
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Crank/start issue... help!!!

Ok so I have a BMW 328i 1998, and here are some examples of when the cranking fails.

If I don't drive my car for a few hours it will start in 1 shot.
But if I lets say go to the store, turn the car off and try to start it while the engine is hot, I would have to crank it at least 4-5 times before it starts. (lots of fails) but when engine is cold, like I said 1 shot to start it.
Also its the winter time.

Its not alternator, battery(new as well) & spark plugs just changed but still same problem.

My mechanic said it could be cam sensor or obd control(i think).

Let me know if you guys have any advice on what to replace..
Thanks
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  #2  
Old 12-29-2010, 02:54 PM
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ZeGerman ZeGerman is online now
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Hmmm... The only time I've had a car hesitate to start when hot was in my GTO, and it was due to the starter getting too hot and drawing too much current. Since your car seems to be turning over freely, it doesn't seem to be a starter issue. Cam position sensor seems like a good thing to consider, but others may be able to shed more light onto this.
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  #3  
Old 12-29-2010, 07:22 PM
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drivinfaster drivinfaster is offline
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cranks sensors and cam sensors tend to do this sort of thing. my initial suspect would be crank sensor first, as these tell the pcm that the engine is moving. they can also be easy to check if the scantool you are using (obd2) is indicating rpm when cranking.

if no scanner available, then a quick check of the resistance of the sensor or backprobing the connection to check the signal are the only other ways of checking other than outright replacement.

but guessing can be expensive.


df
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  #4  
Old 12-29-2010, 07:35 PM
Bking Bking is offline
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Bad check valve in the fuel system. Its probably inside the fuel pump assembly. These cars have to maintain a high residual fuel pressure in order to start when warm since the fuel program will not give it any extra fuel.
Some people just add another check valve inline somewhere to save replacing the whole fuel pump. I don't know where to get just the check valve anymore. As always, the first step in troubleshooting most issues on a bmw is to check the fuel pressure, it should stay near the operating pressure for at least 45 minutes after turning off the car. The next likely item would be a leaky fuel injector that bleeds down the residual pressure.

Last edited by Bking; 12-29-2010 at 07:37 PM.
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  #5  
Old 12-29-2010, 07:42 PM
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i would expect a faulty check valve to exhibit a hard start/long crank period at all times, especially when sitting for extended periods of time. the op's concern as stated is just the opposite.

so while it is possible, it would not be my first suspect. crank sensors and cam sensors tend to follow this pattern of failure more often than the check valve scenario*.















*that and bmw didn't make checking fuel pressure easy on their e36's...
df
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  #6  
Old 12-29-2010, 07:49 PM
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Quote:
Originally Posted by drivinfaster View Post
i would expect a faulty check valve to exhibit a hard start/long crank period at all times, especially when sitting for extended periods of time. the op's concern as stated is just the opposite.

so while it is possible, it would not be my first suspect. crank sensors and cam sensors tend to follow this pattern of failure more often than the check valve scenario*.















*that and bmw didn't make checking fuel pressure easy on their e36's...
df

It's made pretty easy if you install a fuel pressure gauge.
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  #7  
Old 12-30-2010, 04:04 AM
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It's made pretty easy if you install a fuel pressure gauge.
showoff...


























df
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  #8  
Old 01-15-2011, 02:23 PM
bmw328i98 bmw328i98 is offline
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Hey so here's an update.. I went to a BMW Mechanic and he first said it sounded like engine temperature sensor then he kept it for a day and then he called me and said it was the starter and that it wasn't turning over. And he gave me a price of 700$ to replace starter. I went to this shop before when my car had overheating issues and they told me it was cause I installed a high performance fan... that didn't make sense though because my mechanic tried 2 bmw fan clutches and still kept overheating eventually i got help here on forums and people kept telling me to bleed it and finally worked after bleeding it a lot of times.

So is this mechanic lying or do I need a new starter?

Also yesterday night after coming back home, I stopped to get gas & I thought I would have to sit in the gas station for 10-15 mins just to start my car, fortunately it started in 1 shot when the engine was hot. I think the car is possessed or something but any advice would be great, thanks.
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  #9  
Old 01-15-2011, 06:33 PM
mastermech63 mastermech63 is offline
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If the starter turns with no problems, then its not the starter.
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  #10  
Old 01-15-2011, 06:38 PM
mastermech63 mastermech63 is offline
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Your battery may be weak. Try jump starting it while the car is hot and see if that helps. Or it may be a fault in the fuel injection system.

Last edited by mastermech63; 01-15-2011 at 06:40 PM.
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  #11  
Old 12-04-2012, 08:06 AM
Scorpian Scorpian is offline
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i am having the exact same problem. i thought it was the starter at first, but am still looking into it. did this ever get solved, or does anyone have any idea what it is?

Whenever its below 0 the car starts like a champ. if i run it for 5 mins it starts giving me grief.
it spins, or does nothing, or cranks over twice and wont catch...

Cheers.
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  #12  
Old 12-04-2012, 08:31 AM
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check your sensors

then fuel pressure

if fuel pressure drops to 0 right after turning off the engine

check valve is broken
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  #13  
Old 12-05-2012, 06:46 PM
bmw325i82 bmw325i82 is offline
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I have a 94 325i and i just put a new alterantor in all wires hooked up right,j started it up ran and drove fine but when i came out a few minutes later it wont turn.over any ideas
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  #14  
Old 12-05-2012, 06:50 PM
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bad battery?? faulty starter?? ignition switch?? neutral safety switch??

need more details.





df
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  #15  
Old 12-05-2012, 07:33 PM
bmw325i82 bmw325i82 is offline
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help

When i go to turn it over the starter will click but thats it,
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  #16  
Old 12-05-2012, 07:40 PM
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Originally Posted by bmw325i82 View Post
When i go to turn it over the starter will click but thats it,
Then as stated by df above it's either a bad battery or alternator.

Also possible to be a sticking bendix in your starter, but go to a big box store and have them test the battery & alternator for free before spending any money.
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  #17  
Old 12-05-2012, 08:15 PM
bmw325i82 bmw325i82 is offline
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help

The alterantor is brand new,when i started the car it sounded like the starter was spinning
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  #18  
Old 12-05-2012, 08:19 PM
LuckyFlop LuckyFlop is offline
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In the movies when a car doesnt start on the first attempt, it usually means you car is about to explode......
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  #19  
Old 12-05-2012, 08:44 PM
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Quote:
Originally Posted by bmw325i82 View Post
When i go to turn it over the starter will click but thats it,
Quote:
Originally Posted by bmw325i82 View Post
The alterantor is brand new,when i started the car it sounded like the starter was spinning
Which one is it?

Just a click? (indicating that it is not getting power)

Or a click then spinning without engaging? (Thus indicating that the bendix isn't deploying)
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  #20  
Old 12-05-2012, 08:58 PM
bmw325i82 bmw325i82 is offline
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help

When i started it after i put the alterantor it sounded like the starter was spinning and after i turned the car off and went to start it again all it did was click,i was told it was the ignition switch
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  #21  
Old 12-05-2012, 09:02 PM
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If the ignition is closing the circuit to get power to the starter, then I highly doubt that the ignition is the issue.
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  #22  
Old 12-05-2012, 09:02 PM
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Again. Sounds like not enough power to the starter.
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  #23  
Old 12-05-2012, 09:11 PM
bmw325i82 bmw325i82 is offline
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thanx

Thanx for the help,so is the battery the problem cause its at 100% charge or is it a wire
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  #24  
Old 12-05-2012, 09:20 PM
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I'm not going to write it for a third time. Read up.
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HAS KEN HAD HIS MEDS YET?
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  #25  
Old 12-05-2012, 09:47 PM
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ZeGerman ZeGerman is online now
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Have your battery tested.
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