fed up with my truck

my 2000 f150 4.6 has a bad miss had truck to dealer they changed plugs no improvement #2&#4 cylinders miss changed COP on both no improvement and sometimes whole right (passenger side) bank of engine misses any ideas ?

white89gt

What are all of your codes you are getting?

fed up with my truck

No check engine light no codes or pending codes8

white89gt

How did you know cylinders 2 & 4 were missing?

fed up with my truck

dealership tech said O2 sensor reading lean but didnt specify which one then stated they did pin point diagnostic and sensor was working fine that was not the reason for the misfires. didnt say what was causing the lean condition.

fed up with my truck

dealership tech scanner showed #2 #4 missfire and sometimes entire right bank (passenger) side wasnt firing

white89gt

It sounds to me like the dealer should be taking your truck back in and fixing it. I assume they were using mode 6 real time data to find that then. If you went in and paid them to fix it, I'd take it right back.

What they did is really the only way you're going to determine what is going on. They just half-assed it.

fed up with my truck

The tech who worked on it said he thinks it a fuel issue but couldn't explain why he thought that or what kind of fuel issue.

F150Screw5.4

If I was to ever take my truck to a dealership I would want them to fix it, and fix it right. They charge you so much now a days that I wouldn't accept anything else but a 100% fix. I mean after all it is the dealership, they have access to advanced tools and parts. If you paid them, and they did not diagnose it, I would suggest taking it right back.

Jbrew

Torque Pro could of told you what the tech did...and then some. What kind of cope's did you get ? If you losing the whole right bank intermittently, that tells me it's PCM, - the solid state switches are going out....your coil drivers. Definitely fuel first, - it is the general rule of thumb to completely rule out first. The tech shouldn't question or guess at anything fuel related, he should know or he ain't worth a snot.