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E36 (1991 - 1999)
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  #1  
Old 08-12-2019, 04:52 PM
joseRoz joseRoz is offline
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Car won't start after rear subframe overhaul

Hi all,
I just finished a rear reinforcements, bushings etc.
Finished up everything, was very happy about but then out of no where the car didn't start.

During the process I removed the subframe, driveshaft etc and disconnected the fuel tank and all sensors.
Battery wasn't connected most of the process which took a month a a half.

When I was trying to start the car it cranked, starter is good and there is electricity.
I added extra 5 litters of fuel, and I checked if the fuel rail valve squirts fuel so fuel pressure is fine (I tried to eliminate fuel problems).

The traction control light is constantly ON when I try to start it.

Please advice.
Thanks!!
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  #2  
Old 08-12-2019, 11:36 PM
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hornhospital hornhospital is offline
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Welcome to Bimmerfest!

Getting a squirt of fuel from the rail doesn't mean it has high enough fuel pressure to run. You have to pressure test it.

My guess is you've missed reconnecting something at the tank, and with and ABS light on continuously, you've got a pinched/shorted wheel speed sensor wire.
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Old 08-12-2019, 11:56 PM
joseRoz joseRoz is offline
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Quote:
Originally Posted by hornhospital View Post
Welcome to Bimmerfest!

Getting a squirt of fuel from the rail doesn't mean it has high enough fuel pressure to run. You have to pressure test it.

My guess is you've missed reconnecting something at the tank, and with and ABS light on continuously, you've got a pinched/shorted wheel speed sensor wire.

thanks I will have a look at all sensors.
I don't have a fuel pressure gauge\tester but I will get a code reader.
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  #4  
Old 09-04-2019, 04:21 PM
joseRoz joseRoz is offline
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I checked the fuel pressure and I a getting a 50psi while I am trying to start the car, with one key turn its 45psi stable.
Should I check fuel relay? or there is no point because there is fuel pressure.

any other option you can think of?
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Old 09-04-2019, 07:24 PM
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hornhospital hornhospital is offline
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That is more than enough pressure to start and run it. Nothing wrong with the pump or relay. Spark? And test the injector firing circuits with a noid light. You can rent/borrow one at most auto parts stores, or you can make one from a #194 bulb.
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guessing gets expensive...drivinfaster
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buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot
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1993 325is M3 clone"Ashlyn"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette";1995 318is"Bebe "; 1985 325e "Hazel Ann"


Last edited by hornhospital; 09-04-2019 at 07:29 PM.
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  #6  
Old 09-04-2019, 08:07 PM
joseRoz joseRoz is offline
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is it possible that abs\speed sensor can prevent the car from starting?
I have the warning light on, and I didn't touch the engine at all during the process.
so the main suspects are the fuel and the wheel\diff sensors and the fuel is fine.

Last edited by joseRoz; 09-04-2019 at 08:22 PM.
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Old 09-04-2019, 09:41 PM
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Negative. ABS/wheel speed sensors have no control over the engine to prevent starting that I am aware of.

I think you will find this to be an ignition, injector or injector pulse problem. It's either not getting fuel through the injectors or not getting spark. Have you tried to get it to fire on starter fluid?
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BMW-CCA #441426

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Old 09-04-2019, 10:02 PM
joseRoz joseRoz is offline
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Quote:
Originally Posted by hornhospital View Post
Negative. ABS/wheel speed sensors have no control over the engine to prevent starting that I am aware of.

I think you will find this to be an ignition, injector or injector pulse problem. It's either not getting fuel through the injectors or not getting spark. Have you tried to get it to fire on starter fluid?
ok thanks,
I didn't tried with a starter fluid, assuming it will die I still won't know whats the exact problem right?

btw, code reader like C110 will be able to diagnose wether is injectors or spark problem?

thanks.
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Old 09-04-2019, 10:07 PM
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hornhospital hornhospital is offline
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If it fires and dies on starter fluid it takes the spark plugs/coils out of the "why it won't run" equation. Then you know it's strictly a fuel problem.
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Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot
Ken Kanne, Silverhill, AL, Bimmerfest Site Moderator
BMW-CCA #441426

1993 325is M3 clone"Ashlyn"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette";1995 318is"Bebe "; 1985 325e "Hazel Ann"

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  #10  
Old 09-04-2019, 10:25 PM
joseRoz joseRoz is offline
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Quote:
Originally Posted by hornhospital View Post
If it fires and dies on starter fluid it takes the spark plugs/coils out of the "why it won't run" equation. Then you know it's strictly a fuel problem.
right! thank,
what about the code reader do you know if it can diagnose spark\injectors?
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Old 09-05-2019, 06:32 AM
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hornhospital hornhospital is offline
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No. It may give you a generic code for misfires on each cylinder, but it has to RUN first.
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot
Ken Kanne, Silverhill, AL, Bimmerfest Site Moderator
BMW-CCA #441426

1993 325is M3 clone"Ashlyn"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette";1995 318is"Bebe "; 1985 325e "Hazel Ann"

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  #12  
Old 09-11-2019, 05:13 PM
joseRoz joseRoz is offline
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I used C110 to read the codes:
DME is clean,
ABS (I have a a light on) - no communication,
EWS - 09, 41, 00, FF No found OF power on reset.

couldn't find a good answer on google about the ews codes.
What is means?
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  #13  
Old 09-22-2019, 04:48 PM
joseRoz joseRoz is offline
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this things was a challenge but it was solved.

I changed the spark plugs and the car started after couple of rough tries.
The previous sparks although new, they were covered with carbon.

it was pretty hard to detect because my first guess was something with the fuel system because I removed the fuel tank.

thanks for the help!

Last edited by joseRoz; 09-22-2019 at 04:54 PM.
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