hello everybody! im new here and hate to start with a question but im running out of options could someone please help, here is my problem i change the intake manifold on my 2000 f150 with the 5.4, and now it wont start, the engine turns but it seems as its not getting fuel or spark ive check all the connections and seem fine and the anti theft light keeps flashing is there anything i can do on my own i really want to avoid the stealership due to low cash at this time, thanks for your help in advance

 

Are you using a "coded" key? I have a "hide-a-key" on my truck that isn't coded and it unlocks the truck and will make it turn over but will not spark, make sure your key is coded

 

yes i am, it was working before but i change the intake manifold and now it wont start and the theft light on the dash keeps blinking.

 

Seems that the chip inside your key is bad... if your anti theft light flashes even after you put the key in its the chip. I believe is cutting off the fuel to the engine or the spark. I had this same thing happen to me after installing a remote start.

 

go to the dealer and have them make u a new coded key and try that, btw make sure u disconnect the battery after u install that intake to reset the computer, that might also help ur key issue. the process to make a key "coded" is in the owners manual