Need help stuck at work w video

[bastianshaw]

http://youtu.be/xjJOlfmTQLw

Been doing this off and on for a while. Dies at idle but starts back up everytime, has 19 pound injectors and a markd chip. I'm thinking clogged cat? I pulled over and tapped on the Icv and it helped for a second the. We t back to doing it.

[LJ851]

Crank sensor maybe.

[bastianshaw]

Crank sensor maybe.

i didnt know that would/could cause intermittant problems

[Etexise30]

nope it wont

[///Bimmerfan]

I dont know if this will help, but I was having similar problems as you so I checked my plugs and they were all fouled out. I also had different spark plug wires on at the time that were acting up so i went back to stock and replaced the plugs and it ran like new. Hope it helps

[E30_Pare]

vacuum leak.

[saturnv7890]

Yeah I'd start with the basics, smoke test, plugs, condition of ignition and fueling systems

[GT BMW E30]

icv swap it out

[bastianshaw]

vacuum leak.

no but thanks

[bastianshaw]

I dont know if this will help, but I was having similar problems as you so I checked my plugs and they were all fouled out. I also had different spark plug wires on at the time that were acting up so i went back to stock and replaced the plugs and it ran like new. Hope it helps

this is interesting i have been running rich due to the 19lbs, are you running stock injectors?

[Mr. Schwarz]

Is your intake boot in good shape? Can you give us a picture of your intake boot? Im willing to bet its a intake leak somewhere. I had the same thing happen with mine, the boot tore and would stall out and jerk around.


Edit: Running rich may be the cause of an intake leak as well. The AFM cant measure the air that is escaping in the leak post AFM.

[AndrewBird]

Intake leaks cause a lean mixture, not rich. The engine doesn't know there is extra air.

[Mr. Schwarz]

Intake leaks cause a lean mixture, not rich. The engine doesn't know there is extra air.

Wouldnt the O2 sensor sense a lean mixture caused by unmetered air and and try to richen it up?

[LJ851]

i didnt know that would/could cause intermittant problems

nope it wont

I guess nobody told my crank sensor to not fail intermittently, it sounded very similar to OP's car randomly for a few months before it failed for good.

But what do i know?

[bastianshaw]

Wouldnt the O2 sensor sense a lean mixture caused by unmetered air and and try to richen it up?

it only has so much trim but yes it will