FIXED: Stuttering at 3k RPM.. has anyone figured this out? --- VIDEO INSIDE

[Dj Buttchug]

is your spark plug gap correct?

[mr ilia]

You need new AFM. This exactly what I had, except with me it was happening at about 6000 rpm, like a rev limiter. The engine light would come up briefly when hitting the "limiter".

[Nairb]

Ok, I've searched all three great e30 forums (r3v, e30tech, m42club) and I have tried everything from those threads. They are usually ancient, and nothing ever seems to be resolved about this problem.. so here it is:

M42 stutters when it hits 5k RPM. It acts just as though I am hitting the rev limiter.. except I lose power and my tach jumps.. it will keep doing this until my car starts dropping in RPM. I am completely stumped.

Here is a link to a video that I've made: http://www.youtube.com/watch?v=bPNIZQ5kn3w

Here is a pretty complete and up-to-date list of what I have done to the car that would affect engine performance:

Mods:
Mark D 93 Octane Chip
K&N Air Filter

Maintenance:
New Throttle Cable (149,000 - June 2011)
New Camshaft Position Sensor (149,000 - June, 2011)
New Bosch O2 Sensor (February 2011)
New Fuel Filter (July 2010)
New Timing Chain Tensioner (March 2010)
New 4-Pintle Bosch Fuel Injectors [Part #:0 280 155 710] (September 2010)
New OEM Bosch Spark Plugs (September 2010)
New HQ Autosport Coil On Plug Kit (September 2010)
Fixed the "Mess Under The Intake" (September 2010)

I am running 93 Octane fuel.. always have. No hoses are getting crushed and everything is hooked up properly. Still have not replaced fuel pump, but I don't see why that should be a problem.. never have had a problem with fuel pressure.

Anyone? Ideas? HALP!

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FIXED. Read here.

It was the crankshaft sensor!
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