Hey everyone I got an 02 lightning I had trouble with past couple weeks... Well first it shot out a plug I had it fixed and replace all plugs... Then it started to idle low n motor shook pretty rough and smoke came out the exhaust ... I took it to a friend from ford he hook up the computer and it read as an excursion n seem to have a program deleted all the check engine lights ... so he program to the right one it should have n my check engine pop up showing that my injector 3 was failing ... It was stuck open pouring gas onto the plug so he replace the plug n the injector n it ran fine till the next day it did the same thing ... It's idle low like it wants to turn off n evrytime I hit the gas smoke comes out the exhaust but no check engine light has came on... Any advice? PCM?

 

Is it stock?

 

Well I got headers on it ... I found out it had a tuner so it back to stock... My check engine light came on code read p0303 n it's misfire cylinder #3 it's not the spark plug I just done a tune up on it... A friend from for told me might v a bent vavle or a broken spring.... But it's also burning oil... Any clue to what it might be?