What could be wrong
Thread Starter
Junior Member
Joined: Apr 2026
Posts: 3
Likes: 0
What could be wrong
I have a 2002 f150 supercrew 4.6 i put a 2008 crown vic cop motor in it and iam having a problem getting it to do the drove cycle. It has a miss fire that gets bad when its in drive. It has new coils and plugs ìam getting some codes p0136 p0406 and a p0171. I have popping sound coming from the motor any help would be appreciated
Trying to figure it out!
Joined: Jan 2016
Posts: 2,991
Likes: 920
From: Ft Worth, Texas
Could be that the ECU doesn't know how to read the sensors on that engine.
Could be that you have something wrong with your fuel delivery.
Could be a bad wire somewhere.
Could be a lot of things.
Did you start by looking up the codes?
Could be that you have something wrong with your fuel delivery.
Could be a bad wire somewhere.
Could be a lot of things.
Did you start by looking up the codes?
Senior Member
Joined: Sep 2011
Posts: 381
Likes: 140
like a really loud popping sound???
like you have a sparkplug that has ejected from the cylinderhead & only thing holding it in place is the coil assy?
if it has individual coils, put your hands on each one individually & feel for the popping vibration on top of the coil.
or a popping sound like the engine is popping back through the intake manifold?
like you have a sparkplug that has ejected from the cylinderhead & only thing holding it in place is the coil assy?
if it has individual coils, put your hands on each one individually & feel for the popping vibration on top of the coil.
or a popping sound like the engine is popping back through the intake manifold?
