3.0L 2003 Ranger 3 cylinders Misfiring i need some help please

[red Ranger (Sarah)3.0L]

You sure it's running on all 6 at this point?

hmm thats a good point i am pretty sure it is it sounds like it should i hard start it and listen for a Gallup ?

 

[pentode]

I guess OBD2 would be the easiest and most definitive... if you have an IR temp gun you could check each exhaust port for a dead cylinder. Or the old water gun trick, depending on how intermittent it might be. Of course this is assuming it's a misfire still, but it does sound like that.

 

[red Ranger (Sarah)3.0L]

I guess OBD2 would be the easiest and most definitive... if you have an IR temp gun you could check each exhaust port for a dead cylinder. Or the old water gun trick, depending on how intermittent it might be. Of course this is assuming it's a misfire still, but it does sound like that.

i dont think its misfiring but it could be there is no check engine light anymore but it feels sluggish so it could be a intermediate misfire

 

[pentode]

It's more the shaking and roughness I'm thinking of. Along with the apparent misfire while revving. Since you've been dealing with valvetrain issues, timing is obviously a possibility too - based on your initial description and finding the one broken valve spring, I was thinking possibly more broken valve springs. Did you check them all? I think I read the whole thread but maybe I missed something. I felt like you found one and replaced it.

 

[red Ranger (Sarah)3.0L]

It's more the shaking and roughness I'm thinking of. Along with the apparent misfire while revving. Since you've been dealing with valvetrain issues, timing is obviously a possibility too - based on your initial description and finding the one broken valve spring, I was thinking possibly more broken valve springs. Did you check them all? I think I read the whole thread but maybe I missed something. I felt like you found one and replaced it.

yes i checked the passenger side and cylender 3 spring was definitely broke snapped right in half and i checked the drivers side but they looked good so it could be the timing skipped a tooth how would i check that?

 

[pentode]

yes i checked the passenger side and cylender 3 spring was definitely broke snapped right in half and i checked the drivers side but they looked good so it could be the timing skipped a tooth how would i check that?

If you didn't have the timing cover off I wouldn't worry about timing as far as the timing chain goes. Did you have the cam synchronizer out to do the valve spring? That would be my next guess.

 

[red Ranger (Sarah)3.0L]

If you didn't have the timing cover off I wouldn't worry about timing as far as the timing chain goes. Did you have the cam synchronizer out to do the valve spring? That would be my next guess.

I did not have the cam synchronizer out while doing the valve spring would that make the engine run a bit rough? I was also thinking what’s the likelihood of the engine mounts being bad?

 

[ATXTremor]

Not sure if you ever resolved your misfiring issue, but I experienced similar symptoms, but never received codes. I read thru your post and it looks like you changed your plugs and wires, but you may want to check your fuel injectors. They can often cause the codes you are receiving and given the age of your truck, it might be a good time to check them out.

 

[bcstoy]

the coil pack seems to be prone to cracks at its base do a visual inspection. It is funny this problem sounds like the one I am having.

 

[red Ranger (Sarah)3.0L]

Not sure if you ever resolved your misfiring issue, but I experienced similar symptoms, but never received codes. I read thru your post and it looks like you changed your plugs and wires, but you may want to check your fuel injectors. They can often cause the codes you are receiving and given the age of your truck, it might be a good time to check them out.

hello yes i am going to change the injectors soon but the issue with the misfire was a exhaust valve spring but thank you for your input !

 

[red Ranger (Sarah)3.0L]

the coil pack seems to be prone to cracks at its base do a visual inspection. It is funny this problem sounds like the one I am having.

uh oh what's going on with your truck? my problem ended up being a broken valve spring

 

[Brain75]

...going to change the injectors soon ...

get motorcraft or send in some really junk ones as core to a rebuild place, aftermarket fuel injectors are trash.. (seriously you would be better off getting used motorcraft ones from a junkyard than most aftermarket)

 

[red Ranger (Sarah)3.0L]

get motorcraft or send in some really junk ones as core to a rebuild place, aftermarket fuel injectors are trash.. (seriously you would be better off getting used motorcraft ones from a junkyard than most aftermarket)

oh damn really! because i am going to the junk yard tmr to get some parts for the ranger and this other ranger is just like mine so you think i should take em ?

 

[Brain75]

there's a way to bench test em / open em up... little dangerous, possibiity of spraying a fire all around, check out this one or google around for bench testing fuel injector - determine if you neeed any before you go would be my method. depends on your budget and tolerance for having tons of spares laying around.

that was the first video that came up, of course use some sense, fire extinguisher, etc etc etc.