1987 BMW 325E will run for 3 seconds? - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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#1 (permalink) Old 03-20-2012, 12:59 PM
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Angry 1987 BMW 325E will run for 3 seconds?

All,
Car starts and runs for 3 seconds on first crank and 1 second on second crank, thereafter will turnover but not start. After about 20 minutes will repeat this cycle but will not start and run.
Tested - cold start injector, fuel pump (relay and filter), checked resistance of crank position sensor and EGR valve all are good.
New coil and battery.
Any thoughts?
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#2 (permalink) Old 03-20-2012, 05:00 PM
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Theirs a very good chance you have a vacuum leak. Vacuum leaks are know. To cause numerous idle issues. Check all your vacuum lines and hoses, including the intake manifold. Feel then and bend them because a crack may not be visible unless moved. Check your PCV valve as well because they can become faulty


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#3 (permalink) Old 03-21-2012, 03:09 PM
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As Vader says... I don't think its electrical !


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#4 (permalink) Old 03-22-2012, 05:03 AM
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I would strongly suggest it is the fuel pump.


Even though it is operating, it cannot keep up enough pressure to keep running.

just because its running doesnt mean its working enough.

you need to test the fuel pressure.
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#5 (permalink) Old 04-03-2012, 07:32 PM
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Id check fuel pump, and that vacuum fuel pressure regulator. If the pressure regulator isnt working properly, it may cause it to do this type of behaviour.
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#6 (permalink) Old 05-29-2012, 01:04 PM
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EGR valve replaced, fuel pump checked, vacuum regulator replaced, relays checked, both positioning sensors checked, fuel filter replaced, fuel tank checked for foreign matter (none).
Still no solution.
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#7 (permalink) Old 05-29-2012, 01:31 PM
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ICV? Can cause issues when it goes.


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#8 (permalink) Old 05-30-2012, 01:36 AM
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Sounds like it could POSSIBLY be a plugged cat? Also did you check the fuel pressure? If Im not mistaken its sposed to be around 40-46 psi.
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#9 (permalink) Old 05-30-2012, 12:25 PM
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Replaced ICV and checked fuel pump flow is good but did not check pressure.
Will check pressure and if CAT converter / tailpipe is blocked.
Any other thoughts?
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#10 (permalink) Old 06-06-2012, 04:10 PM
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Replaced fuel pump but still not runing.
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#11 (permalink) Old 06-09-2012, 10:59 PM
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Ok, is it loading up and flooding out? Its a SLIM possibility that it COULD be the idle air valve. If its loading up with fuel.

EDIT: Also it could be a clogged fuel line. Check your fuel lines before doing anything else and then report back, k?

Last edited by m20enginebuilder; 06-09-2012 at 11:02 PM.
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#12 (permalink) Old 06-09-2012, 11:01 PM
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Both fuel pumps? I'm assuming yours has 2 (one under rear seat and one in-line regulator after fuel filter) like my '87 325....
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#13 (permalink) Old 06-10-2012, 08:48 PM
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Could not remove fuel pump from gass tank. Only replaced inline pump. Will check tank fuel pump this week.
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#14 (permalink) Old 06-11-2012, 12:12 AM
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Quote:
Originally Posted by mantisdrl View Post
Could not remove fuel pump from gass tank. Only replaced inline pump. Will check tank fuel pump this week.
If you dont know how to remove the in-tank pump, it can be a royal PITA, but its actually extreamly simple. First disconnect everything-fuel level sending unit, fuel pump itself, and fuel lines. Then about that fuel level sender- if you DO NOT remove this, you CAN NOT remove the fuel pump carrier. Pull the 4 nuts on top of it, and pull it out. Then you pull the fuel level sender strait out of the tank. At this point you can remove the fuel pump and carrier. Twist til it stops and lift out and move it til it comes out WATCH OUT FOR THE SOCK on the bottom of the fuel pump, if you are not careful itll fall down into the tank. Also keep tools away unless you got a magnet. I dropped my dads screwdriver down into mine the other night when I pulled mine. Reverse procedure to install. Also, the fuel pump comes out of the carrier. Takes about an hour at most for me.
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#15 (permalink) Old 06-11-2012, 01:00 PM
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Thanks.
Tried to pull it out earlier. After removing 4 screws I was able to twist and pull it up about 6 inches but no matter how I turned, angled or twisted I couldnot get it out of the hole. So tonight I will jump the relay to see if it will pump. If I have to remove it I may have to convince it with a hammer.
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