starts missing around 3-4k rpms

[TobyB]

After having seen 2 or 3 AFM's full of water, I'd look there...

if the cap seal cracks, they seem to fill up pretty quickly...

just my kick recently...

t

[R1ckM]

It had a engine put it in recently before I bought it. I am familiar with the shop that did it and even asked them about the ix when i saw it parked there. (months before it was for sale)

Today I was cleaning the car inside and out (was dirty and meh). I turned the car wash sprayer on spot free for less preasure and cleaned the engine bay tracks out (lots of dirt and stuff collects there).
After that I took off and shortly after it started missing and cutting out. The engine would die under a load. It would start right back up and idle ok. Soon as I took off though it would start to sputter, cut out and die after about 30 seconds under a load.

I don't know if that had anything to do with the previous issues but after letting it sit for the day it still is doing the same thing. Maybe I will need to give it another day to dry if I got anything wet that shouldn't be.

I checked the vac lines and intake boot, seemed crack free. The intake inlet by the front bottom bumper that goes into the air flow sensor and intake. The tube that connects to draw air through the bumper wasn't connected and doesn't seem like it will be able to for some reason. It comes up short.

So for the rpm cutting issue, should I just adjust the AFM and make it run a little richer?
The shop that worked on it and put the engine in isn't really a bmw specific shop so maybe they didn't get it tuned to spec if anything was a little off.

[TobyB]

AFM,

fuel pressure if it does it over 4k consistently,

plugs, wires, cap, rotor...

t

[R1ckM]

I got another e30 an 88 325ix. Got it looked over and it checked out good.
Took it on the hwy and i noticed that when I get to around 3.5-4k rpm it starts to miss and cut out a bit. Runs great besides that and at other rpms.
Its not throwing the CEL either.
Any ideas as to what it may be?

Heres a video based off my 2nd post: