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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 08-13-2012, 03:29 PM
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Hot start issue and something else while youre here

Ok been battling this issue for a while now

When the car is operating temp and I shut it off for 5 minutes it'll start up no problem.

However if the car sat for maybe 15-20 mins it will refuse to start or will have a hard time stating up. Most cases extra long crank, sometimes more than one extra long cranks or long crank than it catches misses goes to about 300 rpms stall or it will gain composure and idle fine. sometimes it'll stall twice.

Leave the car for about 2-3 hours or more it starts up first try.



Long story short:
When Hot-
5 Mins =Start

15-20mins = No start

2.5hours- or more = Start


I changed
the Coolant temp sensor = No change
Cam sensor= thought it worked but today it took 2 cranks on the first start of the day
Crank sensor= first thing I changed (Cant remember if this was the reason why I changed it)

Once the car is started it runs and idles perfectly

This has been going on before AND after chipping the DME

Oh and once it starts it does have a weird smell (gas maybe?)

This may have to do with when I let off the throttle the car stinks but as long as my foot is on the gas there's no smell

Young Ken, suggested a clogged return line and the fuel is just running in to the chambers

And before the 1st start of they day my car started like it was missing for a second or 2 then continues fast idling normally
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Last edited by BMRfanatic; 08-13-2012 at 03:31 PM.
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  #2  
Old 08-13-2012, 03:34 PM
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This may sound odd, but have you ever changed your O2 sensor?

Changed fuel filter?

Cleaned ICV?
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  #3  
Old 08-13-2012, 03:41 PM
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o2 was changed- CEL went away less than a mile for it

Fuel filter was changed last year

ICV was cleaned last year

TB- cleaned last year

Sparks- last year

Coils are all in the right ohm spec (but spark would cause it to act up all the time no?)

Seafoamed not too long ago


Had no CEL after the o2 was changed but the light went out like 2 weeks ago
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  #4  
Old 08-13-2012, 03:53 PM
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I have the exact same problem you are having. I have also changed and clean the same parts as you. The next thing on my list was to change my fuel pump and fpr (fuel pressure regulator). Try checking your fuel pressure, after the car is nice and warm.
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  #5  
Old 08-13-2012, 04:05 PM
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Where and how should I go about doing that?


the crank sensor is ruled out. Got a constant reading of 638 ohms
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  #6  
Old 08-13-2012, 04:39 PM
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Check out this thread on Bf.c. Although he is fixing a hose. It should be the same process of getting to the fpr.
http://forums.bimmerforums.com/forum...&highlight=fpr
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  #7  
Old 08-13-2012, 05:13 PM
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aghh looks like im gonna have to invest in a pressure tester
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  #8  
Old 08-13-2012, 05:17 PM
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  #9  
Old 08-13-2012, 05:28 PM
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Thank God, I saw a video on how to narrow down if its the pump and other crap. Looked easy on youtube but we all know things dont go smooth when you actually try it lol

oh well Good luck to me
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Old 08-13-2012, 05:39 PM
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Can you post the video link?
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you never notice how ugly something is until you get rid of it
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That's what my first wife said.
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  #11  
Old 08-13-2012, 07:27 PM
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Part 1


Part 2



Sent from my SPH-D710 using Bimmer App
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  #12  
Old 08-14-2012, 02:55 PM
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Thanks for the video link. That was very helpful, but damn, that guy has a boring voice!
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you never notice how ugly something is until you get rid of it
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That's what my first wife said.
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  #13  
Old 08-14-2012, 03:40 PM
bigugly fab bigugly fab is offline
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take off the fuel filler cap and see if it does that.

as in take it off BEFORE you let it sit.
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  #14  
Old 08-14-2012, 03:58 PM
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Quote:
Originally Posted by bigugly fab View Post
take off the fuel filler cap and see if it does that.

as in take it off BEFORE you let it sit.
Hmm seems odd and easy enough to do

but what would that do to the issue?
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  #15  
Old 08-14-2012, 04:10 PM
bigugly fab bigugly fab is offline
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perhaps. try it and report back.


more than likely you will get a check engine light on, so make sure you have the ability to clear it for a major DMTL leak.
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  #16  
Old 08-14-2012, 04:37 PM
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nope same thing took 2 tries to start it up

My check engine light bulb doesnt work so i cant tell if it caused a code


but then again OBD1 doesnt car for emissions so it probably wouldnt care.

Car ran the same with or without the gas cap
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  #17  
Old 08-14-2012, 05:09 PM
bigugly fab bigugly fab is offline
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no pressure came out?
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  #18  
Old 08-14-2012, 05:13 PM
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yeah pressure did come out


does it matter that I started the car, shut it off then opened the cap?
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  #19  
Old 08-14-2012, 05:17 PM
bigugly fab bigugly fab is offline
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:facepalm:

yes.
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  #20  
Old 08-14-2012, 05:21 PM
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agh , well the car has been sitting now, should I pull the cap now since the last time i started it was when i last posted my findings?
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  #21  
Old 08-14-2012, 05:28 PM
bigugly fab bigugly fab is offline
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do whatever you have to do to replicate the long crank AFTER you pull the gas cap off for a bit
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  #22  
Old 08-14-2012, 05:32 PM
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Ok i just took the cap off (car has been sitting for 30 mins now) no pressure came out


give it 10 mins then start it with the cap off?
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  #23  
Old 08-14-2012, 05:41 PM
bigugly fab bigugly fab is offline
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go start it and drive it, just like your first post. sheesh this is hard for you to understand! lol
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  #24  
Old 08-14-2012, 05:44 PM
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Quote:
Originally Posted by bigugly fab View Post
go start it and drive it, just like your first post. sheesh this is hard for you to understand! lol
Then park it and take cap off after turning engine off?

I'm not following either...
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  #25  
Old 08-14-2012, 05:55 PM
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Lol I just drove it with the cap off nothing changed


What I understood was.

Take gas cap off, start car, drive it

When I 1st took the cap off there was pressure


unless you mean leave cap on, drive car , wait till i know the problem exposes itself then take off gas cap and see if theres pressure?
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