Shuddering? Missing?

[applecrisp]

So I am having trouble trying to solve this new issue.. It seems at low rpm in first and second after engaging the clutch I get weird like lurch until about 2500rpm or equal speed.. the best way to explain it is like a new driver learning to drive stick.. Not really sure where to start.. is it engine, clutch, slave cylinder? electrical? what do you think?

[cooljess76]

With the engine idleing, spray brake cleaner on your intake boot. If it revs up, replace the boot. If it doesn't, check your oil cap. If that's properly tightened, check your CCV.

[xxxJohnBoyxxx]

Originally Posted by applecrisp

So I am having trouble trying to solve this new issue.. It seems at low rpm in first and second after engaging the clutch I get weird like lurch until about 2500rpm or equal speed.. the best way to explain it is like a new driver learning to drive stick.. Not really sure where to start.. is it engine, clutch, slave cylinder? electrical? what do you think?

Do cooljess76's suggestions first. If you don't find a problem then check your plug wires for cracks, pull the plugs and look for fouled or worn plugs.

When was the last time you replaced the plugs & wires?

Is there a CEL (check engine light)?

Do you have a good code scanner or Carsoft?

I think your clutch is ok unless you mash the gas and the clutch slips bad. Most likely vacuum leak or tune up related with the ignition system

[BMW_Hatchback]

I have the same issues, and codes rang up to be the IAC and vacuum leak (1140?)

[xxxJohnBoyxxx]

Originally Posted by BMW_Hatchback

I have the same issues, and codes rang up to be the IAC and vacuum leak (1140?)

Error 1140 = Mass or Volume Air Flow Circuit Range/Performance Problem. I'm not sure if this is even a BMW error code??

So did you find any vacuum leaks?

[BMW_Hatchback]

we fiddled around with the hose that connects to the hoses that connects to the injectors, and the idle jumped. It begins to idle bad when its warmed up, it bounced below 1 like its underevving itself.

[applecrisp]

Well update time! yeah.. it was the boot.. big obvious split in it.. ..

[BMW_Hatchback]

Dude. Same exact thing with me. Did a smoke test at the shop, the boot was shooting smoke all over the place. I knew it had cracks though, but I may have to come back after I replace the boot to make sure there are no smaller cracks that wouldn't show, because all of the smoke went through the biggest crack, which was the boot. I've still got other codes though... Good luck (in Albanian voice from the movie Taken)