I have a 2000 4.7 and i had a cam position sensor code and changed that , also checked the voltage on that and the crank sensor and both are good. But it still wont start, it coughs back through the intake when cranking ANY HELP would be great !!!!

 

moe in wichita ks
most of the time a backfire means its too lean, however even rarer is backfire when its too rich. but first check the rotor and cap, iLL bet its wet. if you put a new cap on, block off the vent in the cap, this keeps wettness out. j b weld works good for this. i have been doing this for years seams to work. for years i put a new cap and rotor on each fall, cheep insureance.

 

on a 4.7 there is no cap and rotor .....

 

o2 sensor or bad gas... From the sounds of it.

 

moe in wichita ks
i guess iam stuck in the past. just last fri i got draged kicking and screeming in to the 20 th century, i got my first cell phone.

 

LOL, yes. 4.7 is way different.

 

Ok if its the o2 sensor why the dont i get a code for that ? No codes at all