Yeah thats the only thing i can think of. The spark plugs and fuel injectors at the only 2 things that run on the same bank. What about an O2 senor could that make the whole bank run like that? Thanks again guys im gonna grab some Seafoam 2 morro along with wiring up my gauges Thats a bunch guys

 

sounds like were kinda having the same problem... take a look and see the OBDII codes my pcm is throwing

https://www.f150online.com/forums/sh...d.php?t=338969

 

Any news?????

Regards

Jean Marc Chartier

 

Well i did the one thing i prob should have done after plugs + filter...i unpluged the batt and let it sit for 30-45 mins with no power started up no check engine light on drove it at 36-38 for about 5 mins and it never did that werid misfire again and it feels fine no more black smoke out of the diver pipe...My computer wasnt happy with my driver bank for some reason. its running fine with no CEL but when it pops up because i know it will *No EGR* ill get a scanner and read it. Thanks for all the help guys. I think i might still try that Seafoam stuff.

 

thats what i think im gonna try this weekend, new plugs and new fuel filter. i unplugged the batt yesterday and cleaned the MAF and it ran good the 1st time i started it, then turned it off, ran inside and then went back out for a test drive and it was back to misfiring....

 

Guy at an auto parts store *Not autozone* Glendales *local auto store they have ASE Certs. framed on the wall.* Said that a Bad o2 senor could cause one whole bank to do that. My o2's are stock so im going to buy some new ones when i get the money. thats for all the help guys

 

No worries - They ALL do that until the misfire monitor finishes doing it's thing. I had a misfire years ago and I let it go for awhile because it was only doing this @ about 45 miles an hour and above.

I had to reboot often to get it to run better for awhile

I did the ebay cheap coils and injectors deal. Spent $120 all together. I robbed them from a 01 Crown Vic crate motor that time . Hey, It ran like a different truck after that, still goin strong. That's when it actually seemed fast .

Doesn't seem all that fast now - after watching built54's vids.

BUT!! It's a hell of allot faster than yours is shifty

 

yea man i think its about time to change my o2's out..theyve been on there got 126000 miles...bout time for new ones i think i dont think there all that much..ive heard like 70 bucks for 2 bosch ones...but idk about bosch cuz bosch are terrible for fords..and motorcraft would be like 54684584,521652651dollars for one

 

As far as O2's - I would buy Bosch before I would Motorcrafts. That almost sounds strange don't it ?

Well , that's only because Ford specs Bosch O2's, not Motorcraft ... - Sounds even stranger ..

BUT!!! Trick is, getting the RIGHT Bosch replacements - others haven't in the past for some reason and had problems. They are pricey. Honeywell is one unorginized corp. IMO. Your safe purchasing replacements from AutoPartsWarehouse.com. That's the place where mine came from and they are the OEM Bosch O2's.

BTW - I would suggest Motorcraft but , I haven't heard of anyone using those yet. So I can't comment.

 

alright man thanks! cuz i sure had my heart set on no-bosch and yes to motorcraft..and yes thats mighty strange..but ill be sure to get bosch and change em out!

 

Yes my STOCK o2's said Bosch ingraved on them and i said Ahhh thats why my trucks not running right... i argued with the guy at glendales for 20 mins to tell him my truck has 2 Front o2's and 2 rear o2's hes says "Denso and Ford show 1 front 2 rear" i said i know i have 2 front i put Long tubes on it i took out 2 in the front and 2 in the rear. then after 20 mins of this he says well..."The 5.4L has 2 front 2 rear"...The 4.6L and 5.4L are the same motor the 5.4L has a longer stroke!!. He finaly gets me 2 denso o2's for 46.99 each and says "I didnt wanna make it sound like i was telling you your wrong but thats what the computer was saying" i told him his computers WRONG!. So my truck now has 3 workin gauges New Amsoil tranny fluid /New tranny filter 8 new motorcraft spark plugs/ new fuel filter and 2 new Denso o2's. and an oil change with motorcraft full sythn about 200 miles ago....id say my truck wont have much to complain about now!! Im hoping the o2 can fix the driver side running rich someone told me that was prob what was doing it. And my o2's were stock...136,000 miles on the same o2s.....Hope to see some MPG increase

Hey Jbrew i didnt run away from the drag race we had set up like you did! You moved!! Cuz ur scared ur gonna get smoked by my lil 4.6L with mehh lil 4R70W im gonna let livernois tear up that stock tune and then ill be stomping 5.4's from 0-60 insted of just 45-95