5.4L ENGINE MISFIRE CODES FIX AND ENGINE SHAKE FIX 

This worked great. I removed my plug ins to the PCM, sprayed the pins with CRC Electrical Connector Cleaner and used my air compressor to dry them out and clean out any debris. These pins were very clean anyway. Then I went to Lowes and picked up the weather stripping and cleaned off the old gasket material on the air filter case. I also vaccumed out the area where the filter goes. It is running much better. Thanks so much!!

Cleaned the plugs and now runs great with engine light off. Saved me big time 👌🏻

Thank you for the vid… I might as well give all three a shot. Otherwise I’ll go back to telling the wife that I have to drive for a few hours to test, when really I’m going to play golf

update, my truck is a 2006 5.4 3v, i cleaned the plugs on the pcm but i feel replacing the weather stripping on the air cleaner was the trick that worked. cheap to do thats what worked for me. great video thanks!

Will try all three of these. Sounds valid.

Just tried this on my 06 f150 and the sensor light disappeared... Feels much better.. 🙏🍻

My 99 started running a little rough . Then I was looking for a vacuum and moved the air box then cylinders 1, 2 ,3 ,4 codes came up misfire . I was at a loss ! I just saw your video and when this rain stops will certainly give them a try ! Thank you for your share !

Different year: 2002 F150 Triton 5.4l. I replaced A/C and all hell broke loose. I had p0352 (second cylinder electrical issue) and A/C compressor would not run. Changed spark plug, injector, ignitor coil with no luck on p0352. Finally, after two year delay, I re-inspected the electrical connectors on the firewall for possible damage. I found that two of the pins in the bolt together connector were pushed back and probably not making good contact. I also found that IF I had a p0352 code the A/C compressor would not run. Every time. When I fixed the connector, both p0352 disappeared AND the A/C compressor ran. I am not sure of the reason for this. This was a key find and allowed me to finally fix both issues by making sure the connector was in good condition. If your not successful at first or only have a temporary/intermittent fix, examine the connector even more closely to make sure that the pins are clean, the gasket is not preventing full engagement, and that your connections to the ignitor coil and fuel injector are securely engaged.

I appreciate your video. I am trying this on my 2005 Expedition with the 5.4 V8 today. Thanks

Thanks man air box cleaner truck worked!!!

That foam you’re talking about you didn’t show where that goes I don’t find any foam in it

Great video I just rebuilt my 2005 f150 5.4 142,000 it's making the same issue p300 and shaking

Straight To The Point did this resolve your engine shake and misfire ? i did this and for a couple days it seemed to get better but still minor engine shake. but low and behold i got the p0303 couple days later and rough on slight acceleration and low power. i replaced vct solenoids like everyone says to do as well.

Be wild if my truck can fixed with your vid. Thanks

what about p1633 no vidoes on this 04-08

Where to reput the foam ? I forgot where it was. My truck did it today after a 2 hour drive in tye heat and a fresh oil change. Stopped at a stop sign jumped back on highway and stutter stutter check engine light flashes and then went away.

What is the hose just to the right of the PCM thicker diameter, ribbed, curved back into cab, connects to a stiff metal line/pipe. I seem to have a leak from there into cylinder 4 which is causing my truck to misfire.

Thanks , what I did was let the air pressure out of the fuel injector rail started the Lincoln Navigator and the problem went away .. So yes you’re right it could be anything..

How is it running for you? You still avoiding the timing, I have done mine either

Mine had a Huuuuuummmm noise at idle. Replaced the IAC valve and fix'd that. Still left with a slight misfire nudge as she idles. Whille attempt to unplug coil AND injector connectors searching the cylinder. Scanner w/live data isn't showing anything out of place other than a misfire overall in general not per cylinder test. The challenge is fun I guess.

mine is doing this intermittently, check engine light flashes and i dont get any codes. always at higher RPM,3k-4k 70-80 MPH. im going to try your tips thanks.

I just replaced the cool! Sparkplugs! even the throttle body and it did run better ! But still have the misfire and rough idle when cold,,, it runs very nice once it's hot! But you can still feel the misfire and code on #4 cyl,, inevern eeset the PCM and nothing!! Next is replacing the temp sensor,,,

Thanks for your video ! I has same problem Bought the truck ! Start but when put on drive or back up it shake but when I drive around 20-30M/h it ok Press gas it shake again after that drive fine at 60-70 Light on need service soon Try to replace coil and spark plug later Thanks

Great video i have a 2005 f250 5.4 3v same ... and shaking a stalling when i stop. Where is the line conected to

I just ripped that foam shit out of my intake a week ago and now I’m having misfires I need to know if this is actually the reason

My 03 f150 is having the same problem

I was told I need to replace both of my catalytic converters my ford 08 f150 is doing the same thing as ur on top of the smell of raw gas all day and it’s drinking so much gas. Check engine light on and it has a back misfire was cylinder 8 but all the plugs and coils have been change. Do you think the converters could be the issues

I’ve been trying to diagnose my 04 f150 rough idle n misfire for a year now, spent way too much throwing parts, gonna try pcm then I give up

Just saved my butt on the side of the road

Imma try this

my inlaws 2007 harley f150 5.4 started pulling. he found it that 3 cylinders are misfiring. he has never changed the spark plugs. never done a tune up. oil changes on time are questionable. they told him he has to rebuilt or swap the engine.

Just bought a 06 with a 5.4. Can i have a misfire but no Check Engine light? runs good but quite a good shake at idle

So I bought a 2008 f150 with this problem ford said it was cam phaser problem we put in new phasers, timing chains, sensors and tensioners but had troubles timing the engine so we took into a local shop and they “fixed” it for $3,600 and the truck ran great for 3 months no problems I even took it off roading in some mud and worked prefect. Last weekend I took it out to our campsite and the truck stalled out. I drove it home with little to no problem and I took it out today for a 15 min drive to see what would happen and the check engine light came on and it the rev meter was trembling and misfires and it was shaking going 80kmh down the road and the knocking was pretty bad. We put in a code reader and it had the P0300 code. So next week or so we’re gonna replace the spark plugs and see what happens and try things to get it running so I can just sell it and be done with it.

My uncles truck has this issue truck was running fine. But as he was leaving truck would shake we notice that one of the coils was loose and the bolt that holds it was broken off

Yes you are so right don't listen to the haters. I did these 3 things and the truck immediately started running correctly, check engine light off, the vacuum hose T's into the vacuum hose running horizontal directly above the one you have tape on. with a check valve between the 2. diagram on sticker attached to the plastic over the radiator. At least it is on my Expedition. thanks man!

500 on coils you should have a junkyard they are about 30 bucks

My 2007 Ford expedition is having the same problem it say in the diagnostic cylinder 7 misfired.im taking to the dealer because fews mechanic want to deals with it

Thank u so much this saved me I love u I’f there’s anything u need let me know u saved me 500

Check the pcv valve, it is located at the Valve cover, on the driver side if stuck open that’s the problem wen engine has multiple misfire and shaking at idler

Anybody fix this problem?

I have done new spark plugs three times, ignition coil’s one time, timing chain, oil pump, replace PCM. done valve repair and no solution

I don’t understand...so how did you fix yours??? 🤔

That’s not vacuum line you plugged there buddy, it’s your A/C system moisture drain. You better unplug that unless you want to replace your evaporator core because it’s been sitting in water.

Thanx

Vct solenoids and new high volumn melling oil pump and you'll never have this again ,not phazers its topend oil volume that ford fuked up on

Mines got no engine lights on just 305k on her but shakes still ffs lol

My 2003 f 150 my truck shakes only when I turn it on for like 10 secs and once it gose abit it's gone and I think my guy said he did injectors and stuff and park plugs so far grrr

Every time my truck has a miss the dealer just change's my plugs and tells me its fine its starting to piss me off.

2005 Ford f150 idling but no power

Damn you can get whole set of coils for $200 in the States

Mine dont throw codes for like anything. Kind of annoying.

Where the connection line goes

If anybody has any good pointers let me know thank you

That could be a drain line for ac

It’s probably the phasers

Unplug both of your variable timming solenoids they are located on the front of your valve covers and see how it runs you can run the truck that way but if this is your problem your cam phasers probably need replaced

This is why I’m trashing my 2008 Ford -150 Triton STX, it is a pile of junk, I’ve replaced so much in it and it still runs like shit and dies at stop signs and red lights.

My truck does this after a rain and the air is very moist

If you dont know you havnt done a good job. Waisting people's time if you just dont know

🤔

You plugged it and it went away... plugged it to what? You said it went to absolutely nothing.. I feel if you would demonstrate the video a little better then people would see. We came to RU-vid to watch a video...

Start this video at 2:30. This is when the video actually starts

Just get to the point heat

Waisting my time Fruit fly setting eggs

That motor with the 3V on it is junk

oh my......you have to get to the point, your viewers Will FALL asleep, before you get into the REAL PROBLEM, THANK YOU.

The Ford dealerships are incompetent and even deceitful. After having so many bad experiences with multiple locations I decided to start doing my own maintenance and to never purchase a Ford again.

Talk to much man!!

Get to the point

Too much bla bla bla. I'm gonna try this anyway.

Why is there duck tape on there?

Cleaned the plugs and now runs great with engine light off. Saved me big time 👌🏻