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E34 (1989 - 1995)

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  #1  
Old 09-21-2013, 07:27 PM
sleepysal sleepysal is offline
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not starting

Went to drive my 1991 525i today and it would not start. It turns over but doesn't start. It was as if it was out of gas, even though it has 1/2 a tank.
If I press the gas while I crank it will start, smoke (smells like gas) but it will die if I don't give it gas.
Any ideas?
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  #2  
Old 09-23-2013, 06:09 AM
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regulator?
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  #3  
Old 09-23-2013, 06:31 AM
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I'm going to guess your crank position sensor. If you can smeel gas when you hit the pedal, that rules out fuel pump and FP relay.
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  #4  
Old 09-23-2013, 05:31 PM
sse34 sse34 is offline
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not starting

Doubt it's the sensor I would say its a clogged fuel filter or faulty FPR/bad vac plate


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  #5  
Old 09-23-2013, 07:52 PM
sleepysal sleepysal is offline
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used a peke scan tool it coded 3 things 1 an open speed actuator 2 mas airflow meter and 3 a closed speed actuator.
The speed actuator is the idle control valve, were is it ?
Strange that it would just die.
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  #6  
Old 09-23-2013, 08:39 PM
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  #7  
Old 09-24-2013, 08:01 AM
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Quote:
Originally Posted by sse34 View Post
Doubt it's the sensor I would say its a clogged fuel filter or faulty FPR/bad vac plate


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on what grounds could it not be a sensor?! OP describes the exact situation for that. And he's smelling fuell when he hits the gas. Not a fuel issue.
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  #8  
Old 09-24-2013, 09:58 AM
imae34driver imae34driver is offline
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ICV stuck closed...

Just my guess.. Opening throttle counters this sorta

Goodluck
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  #9  
Old 09-24-2013, 01:53 PM
sse34 sse34 is offline
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not starting

Bad CPS and the car won't start it would just crank on the earlier models and on the newer it would t crank.

It's starting when he's pushing the gas and dieing when he lets off = fuel related = most likely a fuel filter .. Cheapest solution to try first

Just because you smell gas does not mean the motor isn't getting enough gas to run which is what is sounds like seeing that he can't idle or start the motor



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Last edited by sse34; 09-24-2013 at 01:57 PM.
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  #10  
Old 09-24-2013, 01:57 PM
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Quote:
Originally Posted by sse34 View Post
Bad CPS and the car won't start it would just crank on the earlier models and on the newer it would t crank.
This just is not true. i have a 95 and it cranks without firing with CPS removed. Where are you finding this misinformation.

Huge vacuum leak somewhere possible
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Last edited by Monsignor; 09-24-2013 at 01:58 PM.
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  #11  
Old 09-24-2013, 01:58 PM
sse34 sse34 is offline
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not starting

My 93/11 production had a bad CPS and did not crank

Also read that on other posts I have read

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  #12  
Old 09-24-2013, 01:59 PM
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cps as in crankshaft. not camshaft.
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  #13  
Old 09-24-2013, 02:03 PM
sse34 sse34 is offline
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not starting

Yes could also be a huge vacuum leak

Yes crankshaft ... Maybe my car is funny

I just doubt the car would run with a faulty CPS

The car is starting with it being given gas it's either a vac leak or insufficient fuel issues as stated before


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  #14  
Old 09-24-2013, 02:13 PM
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the car is not starting. It is getting gas. Hence him smelling gas. It firing without catching.
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  #15  
Old 09-24-2013, 02:19 PM
imae34driver imae34driver is offline
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He is opening the TB with the throttle peddle not the fuel injectors.. That is the ECU

More likely air related.. ???

I wanted to say it may not even crank if no CPS but thats iffy..

How could it tell until it cranks anyways lol? Would not know its gone yet right?
Or disconnected it has a value that keeps the car from cranking?



Just thinking out loud hoping it gets us going..
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1995 540i /6 speed.Black on black. C.A.I/JBR LWFW/ Dinan tune/hi flow exhuast /545 SSK /3.15 with LSD / rev-shift racing motor mounts/stage 4, 6 puck clutch/ K Sport coil overs / 19" BBS LM's / suede sparco 368 steering wheel, Recaro bucket seats, sparco 4 point harnesses, NX wet kit, M/T drag slicks
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  #16  
Old 09-24-2013, 02:39 PM
sleepysal sleepysal is offline
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Thanks for the replies . Wouldnt a bad ECU show up on the code reader?
I am going to borrow a MAF and see if I can clean the idel air control valve,as well as replace fuel filter. Will post results.
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  #17  
Old 09-24-2013, 02:46 PM
imae34driver imae34driver is offline
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Quote:
Originally Posted by sleepysal View Post
Thanks for the replies . Wouldnt a bad ECU show up on the code reader?
I am going to borrow a MAF and see if I can clean the idel air control valve,as well as replace fuel filter. Will post results.
The brains most difficult task is to analyze itself...

The computer usually assumes something's off rather than realizing itself is retarded..

If you were retarded how would you know, till you were told.

Same for the ECU.. It thinks the rest of the car is dumb instead maybe
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1995 540i /6 speed.Black on black. C.A.I/JBR LWFW/ Dinan tune/hi flow exhuast /545 SSK /3.15 with LSD / rev-shift racing motor mounts/stage 4, 6 puck clutch/ K Sport coil overs / 19" BBS LM's / suede sparco 368 steering wheel, Recaro bucket seats, sparco 4 point harnesses, NX wet kit, M/T drag slicks
"Skill can only get you so far, then comes money!"
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  #18  
Old 09-24-2013, 02:51 PM
sse34 sse34 is offline
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not starting

Quote:
Originally Posted by sleepysal View Post
If I press the gas while I crank it will start

He said the car is starting if the throttle is pushed

If the fuel rail had a drip of gas in there you would smell gas does that mean you have enough to run the engine?

If you drained your gas tank and ran out of fuel but then stick your noise to the fuel pump hole and smell gas is it safe to assume you still have gas in the tank?

Your logic is flawless

I still say its either a fuel filter or a huge vac leak

Waiting to see what you find




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Last edited by MMME30W; 09-25-2013 at 08:37 AM.
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  #19  
Old 09-24-2013, 08:15 PM
sleepysal sleepysal is offline
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I couldn't clean the IAC looks like I have to remove the intake.
I had my neighbor turn the key on I checked the fuel pump relay and it clicks, good. I open up the gas tank and had him switch the key.... couldn't hear the pump bad. Took the fuel pump cover off ( in the trunk) and again I am not hearing the fuel pump cycle... So I guess I'll swap it out.
Stay tuned!
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  #20  
Old 09-25-2013, 05:11 AM
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Monsignor Monsignor is offline
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Quote:
Originally Posted by sse34 View Post
Probably should re-read the first post before you continue rambling on and making yourself look dumb.




He said the car is starting if the throttle is pushed

If the fuel rail had a drip of gas in there you would smell gas does that mean you have enough to run the engine?

If you drained your gas tank and ran out of fuel but then stick your noise to the fuel pump hole and smell gas is it safe to assume you still have gas in the tank?

Your logic is flawless

I still say its either a fuel filter or a huge vac leak

Waiting to see what you find




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You literally called me dumb for saying it starts and then said it starts. ANNNNDDDDDDD there goes your credibility.
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  #21  
Old 09-27-2013, 08:58 PM
sleepysal sleepysal is offline
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Its ALIVE!!! The culprit was...................... the mas air flow meter .
I got one off of eBay installed it and crossed my fingers. It didn't start right away. I pressed the throttle and it started I gave it some gas and she didn't stall out. It had an erratic idle but was running .
After 10 minutes of running she was idling fine. No check engine light! I shut it down and attached the code reader.. -- no error codes!
I bought a TRE fuel pump and crank position sensor, but didn't replace either. I'll keep them for good measures.
Thanks for the tips. I was about to start shopping for another E34 !
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  #22  
Old 09-27-2013, 09:04 PM
imae34driver imae34driver is offline
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QUOTE "I was about to start shopping for another E34 !"



Ahhh, you really are the sentimental type A.. lol
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1995 540i /6 speed.Black on black. C.A.I/JBR LWFW/ Dinan tune/hi flow exhuast /545 SSK /3.15 with LSD / rev-shift racing motor mounts/stage 4, 6 puck clutch/ K Sport coil overs / 19" BBS LM's / suede sparco 368 steering wheel, Recaro bucket seats, sparco 4 point harnesses, NX wet kit, M/T drag slicks
"Skill can only get you so far, then comes money!"
R . I . P Paul Walker - 1973 - 2013

Last edited by imae34driver; 09-27-2013 at 09:06 PM.
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  #23  
Old 09-27-2013, 09:29 PM
sleepysal sleepysal is offline
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Quote:
Originally Posted by imae34driver View Post
QUOTE "I was about to start shopping for another E34 !"



Ahhh, you really are the sentimental type A.. lol
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  #24  
Old 09-28-2013, 09:35 AM
sse34 sse34 is offline
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not starting

Interesting


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  #25  
Old 09-28-2013, 07:07 PM
sleepysal sleepysal is offline
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Quote:
Originally Posted by sse34 View Post
Interesting


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Yea I agree. When I got the codes off of the Peake scanner I was thinking "no way a MAF meter would cause a no start" but sure as snot it was the cause.
I'm not going to lie to you, when I installed the meter, I didn't think it would fix it, but to my surprise it did.
Last night I went out just to make sure it would still start, it did but the idle was a bit "off"
surging from about 500 to 1000 RPM's.What ever it starts, I'll check it out in the morning.
Had some things to do today and ran into a guy who works at World Pac, he asked me if I had drove the car to let the DME and MAF sync. He hold me to drive it for about 5-10 miles and that should solve my idle issues. Did it and she is running (and starting) better then before.
That Peake scanner was one of my better purchase.
If any one in the Bay Area needs to scan there E34 hit me up.
Thanks again to all of you guys for help and support.
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