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-   -   crank crank crank no start helppp! (http://www.bimmerfest.com/forums/showthread.php?t=670383)

motorthrill 01-15-2013 09:32 PM

crank crank crank no start helppp!
 
whats up. so it drove well forever, an lately(for a week) its been taking a while to start. an now it just wont start.
i replaced fuel filter an nothing an it has proper fuel presure.
replaced valve cover since the oil well were full of oil. could that of hurt something?
what sld i do next?
please help!

jonesin 01-15-2013 09:39 PM

When you turn the key what sound(s) do you hear?

Fuel pump?

Engine turning over?

Starter engaging?

Starter clicking repeatedly?

Starter just clicking once?

No sound at all?

motorthrill 01-15-2013 09:41 PM

the engine will turn over buhb wont start. an yeah the fuel pumps coming on i replaced the relay just to be shure

jonesin 01-15-2013 09:53 PM

First off, check your battery terminals for corrosion and tightness.

Then I'd test your battery, fuel pressure (you can by a fuel pressure gauge from Harbor Freight for ~$20), then we'll get into testing for spark.

motorthrill 01-15-2013 09:57 PM

ive tryed two different batterys (stole the battery frm my jeep:p)an cleaned terminals, allready tested fuel pressure an replaced fuel filter :/

hornhospital 01-16-2013 12:05 AM

Crank or cam position sensor. It's not firing the plugs or the injectors or both.

motorthrill 01-16-2013 03:58 PM

Do u think it could be the mass air sensor?

petriej 01-16-2013 04:01 PM

Unplug it and find out.

motorthrill 01-16-2013 10:44 PM

unplugged it anstill didnt wanna start just turning over an not firing how do i read the check engine light ?

hnaz 01-17-2013 04:08 AM

Quote:

Originally Posted by motorthrill (Post 7319423)
unplugged it anstill didnt wanna start just turning over an not firing how do i read the check engine light ?

OBD1 cars, get a PEAK Sensor for OBD1 cars

OBD2 cars, go to Advanced Auto and rent the scanner. Bring it home, plug it in, turn key into the on (don't start) position, scan.

Sounds like a Crank Position Sensor or Crankshaft Position Sensor. But I am just a keyboard mechanic.

motorthrill 01-17-2013 08:20 AM

i have an obd1 reader that ived used in my jeep an mustang, buh i cant figure out where to plug it in at. i saw a round plug in spot under the hood is that it? where can i get the adapter



an again thanks for all ur help guys!

hnaz 01-17-2013 09:07 AM

Quote:

Originally Posted by motorthrill (Post 7320018)
i have an obd1 reader that ived used in my jeep an mustang, buh i cant figure out where to plug it in at. i saw a round plug in spot under the hood is that it? where can i get the adapter



an again thanks for all ur help guys!

I don't know if all OBD1 scanners are universal.

motorthrill 01-17-2013 11:44 PM

where is the crank or crankshaft sensor located how do i replace it?

hnaz 01-18-2013 06:17 AM

Well, might wanna check the camshaft position sensor as well. Here are vids:

Camshaft position Sensor
http://www.youtube.com/watch?v=vY28qUcyFVc

Crankshaft Position Sensor (If you have a lift, it will make life easier).
http://www.youtube.com/watch?v=nJj3CnHyVwk

motorthrill 01-18-2013 10:59 PM

so i replaced the crankshaft sensor an now it runs!! yay!!! buh it will idle normal then it will start to die then rev up an start to die an rev up
what could cause that

hornhospital 01-18-2013 11:13 PM

Vacuum leaks. Dirty MAF, Dirty ICV.

motorthrill 01-19-2013 12:10 AM

How do i clean those? Like will carb cleaner work

jonesin 01-19-2013 05:43 AM

Absolutely NOT for the MAF!!!!!

Use an electrical contact cleaner for the MAF, (Or specific MAF cleaner). aYnd you can use Carb cleaner on the ICV.


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