I recently put a K&N intake on my 2001 5.4 King Ranch and it didn't start or even crank. Removed and re-installed stock and still wouldn't crank. Let it air out a little and then it did start, but now the Check Engine light is on and has not cranked again after working all weekend. Any thoughts or suggestions

 

did you reconnect the mass air flow sensor and I can't remember the name of the other one that's one the tube about half way up

 

Yeah, I attached both sensors and reconnected the relay to the 1st sensor. I keep reading that the K&N filter may be over oiled, but don't know how to determine if that's the problem.....and their customer service is not responding yet since its a holiday weekend

 

You are better off doing gotts mod and returning that intake. For 20 bucks you can have a better setup.

 

Using the K&N you have to clock the maf correctly or it will over fuel. K&N Filters out of the box are over oiled and will dirty up the maf very quickly.

 

You probably have a leaking vacuum. It will perform much better without connecting the MAF Sensor..