_twisted_

Help me out here, did your K&N make your MAF act up?

I cleaned my filter about 2 months ago, all was ok until recently.

The car runs ok, but when I lug it around in OD within 1/4 mile it starts to die then a slight buck, throws a code 33, and stalls out

SHut it down, Check ENgine light goes out and drive home in D and it hasn't thrown a code.

cwyates4

33 is MAF high voltage...if your wire was dirty, I think you would see a 34 pop up. Wouldn't hurt to clean it, but I'd be looking at other things...like the possibility of a vacuum leak.

engle1147

Had that happen once - the engine made a big bang under hard power while going about 50 MPH then the car died....but it restarted and I dove it home at about 20mph which is all the thing could muster. The thin MAF wire inside was fried - K&N oil all inside the MAF. Your problem should have shown up before 2 months though...mine only took a few days. Check your MAF wire...if it's intact change the 2 MAF relays.

Well at least I now know how much filter oil is too much.

Good Luck!

theadmiral94

It does sound like a dirty MAF (our 94 never gave a code, but it did stumble at 1100-1200 RPM and buck a bit at 1600-1700 RPM.

Once I cleaned the TB, IAC and MAF (using the CRC products specifically for each), the stumble and bucking both stopped.

After reading about concerns about the K&N Filter oil migrating into the MAF, and also a comparision of filters (which showed K&N allowed more dirt through), I also removed the K&N filter and switched to a paper filter (NAPA GOLD), especially since it is only a street car.

BTW, I also found some oily dirt on the engine side of the MAF. I concluded the PCV valve was original and most probably the spring inside was weak and allowing the PCV to close prematurely, causing engine blow-by to be forced backward towards the TB and the backside of the MAF (also found one of those 'airfoils' in the intake, which I removed too).

I posted additional info about this a few weeks ago, try doing a search for my id and MAF to find it...

juanway

Take that K&n filter and get your money back it has a life time warranty and find a wix air filter . that K&n sets to close to the MAF
I have had 2 Maf taken out, to see if it is the MAF unplug it and the computor in the car will go to set default settings and then start you r vette and I bet it runs better. That K&N filter left me standed in Taos , New Mexico.

formul89

My 94 is throwing code H48-MAF. I cleaned the TB, IAC and sprayed the MAF insides with MAF cleaner and it runs better with it disconnected. I can at least drive it that way, but plugged in the engine runs awful.

I'm stumped.

cwyates4

Uh, Me thinks you need to check for power to the maf. If power is there, maf is probably toast.