so, last week i posted that i was having problems with my new K&N air intake, its still running chopy and back firing, so people said it could of been my plug wires that got loose when i installed it, but now i notice that when i unplug my MAF sensor on the intake, it runs fine? any sugestions guys?

 

whats the year of the car and what engine?

 

its a 95 lt1

 

When you unplug the MAF, you force the PCM into open loop operation. In open loop many of the sensors are ignored, and the PCM uses predefined fuel & iginition maps. Being that you probably messed with the MAF when you installed the K&N intake, there is a possibility that the MAF got damaged or improperly installed. The fact that the engine runs better with the MAF disconnected does not automatically mean that the MAF is the cause of trouble.
When in open loop (Speed Density) the PCM only responds to the IAT (Intake Air Temp), MAP (Manifold Absolute Pressure), and timing signals from the Optispark. The other sensors are ignored.

 

that makes sense, well anyway, i've got an appointment on thursday with the garage, they'll scan it and check my sensors, i dont really have that type of equipment at my disposal haha, thanks for the feedback!

 

k&n filters can also clog a maf sensor with the oils that are on the filter, normally isnt an issue with chevys but more lux euro cars ie volvo vw bmw

 

yep if you over oil the filter it can skew the sensors. maf, iat, map.

 

my cousin put a CAI on his scion and it ruined the MAF sensor

 

did he try to clean it, the maf can be cleaned. the filter has to set and drain any excess oil before installing even if its not over oiled.

 

we just put the stock intake back in and brought it back to the dealer the car only had like 300 miles on it at the time