Fuel Problem? Car runs briefly then stops - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 09-28-2008, 01:02 PM
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Fuel Problem? Car runs briefly then stops

I just replaced the fuel injectors on my 1988 BMW 535i. Previous to doing this my car was idling too slow but run fine once it was revved up. Now it will run for a few seconds at a normal rpm then die. If I put my foot on the gas it will rev strong for a while longer then will all at once lose power and sputter to a stop. Does this sound like a bad injector to anyone? I would have guessed that one or two bad injectors would just make the enigne "gallop", but it seems to run strong until it dies. To me it sounds like a fuel pressure issue, or maybe a mixture issue, but I don't know how new injectors could have caused this.


Any guesses, no matter how remote, would be helpful.
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#2 (permalink) Old 09-29-2008, 10:36 AM
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Crap in the fuel filter or you have a air leak on the fuel rail.

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#3 (permalink) Old 09-29-2008, 01:33 PM
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I appreciate your reply. I'm leaning more towards a sensor issue at this point, simply becuase the power loss is too consistent, it seems to drop every 5 seconds like clockwork, like the computer is not getting a reading back from one of its sensors. I alse would guess that something in the fuel rail would cause one or two of the cylinders to underfire or not fire at all, causing a galloping effect, but when it idles for that first three seconds it runs smoothly.

Someone suggested to me that it could be the engine speed sensor. I'm planning on investigating that this afternoon.
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#4 (permalink) Old 11-01-2008, 11:56 PM
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hey kahn, im having the same problem , did you manage to solve it??? thanks Indi.
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#5 (permalink) Old 11-02-2008, 01:27 AM
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Not sure hubby's problem runs along the same lines as Kahn's prob but he has an 88 528E and as we are driving, we can be going for 30 miles but all of a sudden it just dies, he slips it into neutral as we're moving restarts it slips back to drive and away we go. one day it happened 3 times in about 5 miles..

Any suggestions?



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#6 (permalink) Old 11-02-2008, 01:48 AM
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decided to investigate the air intake cos me fuel pump is fine and changed fuel filter. i pulled the sensor from it and i found it started but it just bellowed black smoke. on further investigation i found that the under plate of this intake flow housing had come away. Im asuming this has been my problem all along as its running again but the problem is that its still blowing black smoke. is this going to clear or have i damadged it some how.
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#7 (permalink) Old 11-02-2008, 04:46 PM
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Yeah, it was a lack of air pressure behind the air intake, a tube was busted. I discuss that above.
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#8 (permalink) Old 11-03-2008, 05:43 AM
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Quote:
Originally Posted by kahn10 View Post
Yeah, it was a lack of air pressure behind the air intake, a tube was busted. I discuss that above.
hi mate, managed to dicover the problem. the air intake on mine had blown out the the plate on the housing and therefor was creating the same symptoms as yours. i now have to replace this componant which is proving a little difficult. a second hand one is gona cost bout $200 aus dollars or a new one from bmw will cost $1800 aus dollars. hope i can find a second hand one eh mate. take it easy mate indi
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