Ford Explorer ,Help

I helped my neighbor change the spark plugs and wires today cause she had it diagnosed that 3 of the cyl. were not firing.Now that everything is put back together the motor feels like it is lugging,not getting power.I tried to rev up the motor to get the rpms up to the rev limiter but nothing.
Any Ideas? maybe the cats are clogging up?
It’s an 2005 4.ol v6.

Agree with the cats, had the same issues with a bronco several years ago and that’s what it turned out to be

Key West 1520
70 Yami
She’s little, but she’s pretty, skinny and fast.

PM Capt Ed. He will know.

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I had one years ago. Try cleaning the throttle body. Mine would lug down and occasionally stall. Pretty cheap place to start.

it is easier to beg forgiveness than ask permission

14’’ McKee/30 'rude
“Shenanigans”

the coil pack is prone to go bad on those, also double check your self on the firing order after the plug and wire change.

If it was diagnosed that 3 cly were not firing I would stay that course before worrying about the cats, if it was a reliable source that told you so. Don’t forget simple things such as a clogged fuel filter. Low fuel pressure will play havoc on it.

Good luck!

Well,I pulled out #3 plug today and it was covered with carbon,kinda got me thinking the cat on the right side is stopping up.

Double D.

quote:
Originally posted by Fred67

the coil pack is prone to go bad on those, also double check your self on the firing order after the plug and wire change.

If it was diagnosed that 3 cly were not firing I would stay that course before worrying about the cats, if it was a reliable source that told you so. Don’t forget simple things such as a clogged fuel filter. Low fuel pressure will play havoc on it.

Good luck!


I agree with this, get the spark tested. Coil packs on Ford SUV’s seem to be troublesome sometimes, especially on the Escapes and Maza rebrand (Tribute).

If it does turn out to be a bad coil, I have been warned (by a Tribute owner who got burned $$$$ on this), replace the defective coils ASAP because it can daisy-chain the issue and kill the others, supposedly. I am not sure of the physics behind it but it sounds like the remaining coils get overloaded in voltage. Anyone who knows better, please feel free to correct me on this.

quote:
Originally posted by Double D

Well,I pulled out #3 plug today and it was covered with carbon,kinda got me thinking the cat on the right side is stopping up.

Double D.


This can also be part of your problem. It happens on my truck (1990 GMC 1500, 5.7l).

If it’s covered with crusty carbon (and not just dull looking dust) then you have oil, most likely, getting into the piston chamber. Leaky valve seal, bad ring, or sticky ring.

Check all the other plugs for the same issue. If it’s a cat going bad, you would think that they would be somewhat “even” in their carbonizing. If it’s just one or two that’s really bad, you probab

Maybe I should have stated what exactly happened first,last tuesday the vehicle would not start at all,it smeeled like it was getting plenty of fuel,so I open up the throttle all the way and it fired up,ran ruff for a few seconds and then leveled out,the she took the vehicle to autozone on friday because the motor starting lugging in power,autozone’s codes were telling that there was a misfire on all cyl.but #3was the main one.Being that was the cheapeast solution,her non mechanical better half started/tried to attemped to change plugs and wires so somehow I got involved.I changed each plug and wire 1 at a time so I had luck on my side to not have any cross fire,When evetthing was toghter I fired the vehicle up and it ran like a 1 legged bird in a metal barrel[skipping,jerking and so on]I shut it off double checked everything and it was correct,after about 5min. of skipping I decided to see if all cyl.were firing buy pulling off 1 wire at a time,all were but #3,I pulled that plug and it was full of carbon,no oil on the plug just a fuel smell,I put 1 off the old plugs back in and did the same process,every cyl. was firing.That is when I asked for some help on here,cause I thought the cat.on the right was stopping up sice there was only carbon on the #3 plug.So now that the full detail is here,what say ya’ll?

Double D.

If it was a plugged CAT then 1-3-5 cyl. would not be firing correctly. I would take a compression test first to see what the compression is on number 3 as compared to all cyl. This would rule out internal problems. If the compression is within range then you more than likely have an electrical problem like a coil.

Capt. Justin

“A foolish faith in authority is the worst enemy of truth”
Albert Einstein

you will save money in the long run…Take it to a Ford dealer and have it diag for 120.00 or so then if you want you can fix it yourself. Auto zone diag testers won’t retrieve all codes available just the gov. required emmission ones. It could be MAF, PCM coil drivers, fuel pressure, wiring issues, injectors etc etc etc. Ford’s cylinders are 1,2,3 on the P/S and 4,5,6 on the D/S

26’ Twinvee Cat
Twin Suzuki 175’s
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Ford exploders…

14’ Skiff-“Redfish Reaper”

Update,the fuel pressure regulater,throttle position sensor,new plugs[again]replaced and now my neighbor is back on the road.

Double D.