Rough Idle on 2003 F-150 5.4L
ryan in davison

Davison, MI

#222 Jun 30, 2009
i have a 97 f150 5.4 its running lean and my #7 plug is misfiring what would make it run lean please help im new to fords
ken

Sacramento, CA

#223 Oct 17, 2009
i have a 97 f150 4.6l it has rough idle and its like a stumble and misfire whe under load good when flooring it and slight backfire under load
edd

United States

#224 Nov 3, 2009
I have a 2003 f150 that the check engine light came on then about 15 miles later I pulled to s red light and it died it fired up but idles ruff any ideas
Amy

Gig Harbor, WA

#225 Dec 18, 2009
I have a ford f-150. When I first start it sometimes it sounds like its not gonna start but always does. I have also noticed that while driving it feels like the front drivers side tire is wobbling...but its not. And it idels a little rougher than usual. Any suggestions?
Tony

Wake Forest, NC

#226 Dec 28, 2009
Hey Frank, I have a rough idle on my 2001 f150 5.4. I have changed the plugs and boots,fuel pump fuel filter and had the injectors cleaned and MAF sensor cleaned. I never reset the computer though.
Bill

Peoria, IL

#227 Dec 30, 2009
I have a 2003 F150, 5.4L. Started missing and the check engine light came on. I had it checked and it was the #6 plug misfire. I changed the plugs and had water in the #6 plug. I blew it out and ohm the coil, it read a lil lower than specs. Dropped some injector cleaner in the tank and reset the comp for 30mins and it stopped. Two days later its doing it again. Any ideas what else it might be other than changing the coil???
Terrell

Highland, MI

#228 Jan 2, 2010
I have a 2004 ford explorer it was running really rough. I had it tested and # 6 spark plugs shows up that has a misfire. I have change all plugs and wires and #6 spark plug is still coming up bad what can it be.
southern boy

United States

#229 Jan 2, 2010
I have a 2004 F-150 4x4 Heritage It has a low idle skip changed all plugs. computer showed #1 misfire changed coil pack then cleared codes still rough idle, but around 2000 rpm goes away and runs good , hooked back up to computer and code showed misfire on #3 cylinder Sooo I changed the coil pack on #3 still have rough idle . Any help would be greatly appreciated I'm stumped .
Paul

Covington, GA

#230 Jan 22, 2010
greg wrote:
i have 97 f150 triton 5.4 check engine light is on running rough . reads code p0307 ,P0307 Cylinder 7 Misfire Detected
dose anyone know the order of the coil packs for cylnder 7. i would change all 8 but i only have enough for the one . anyone - help !!
when standing in front of your auto facing toward it, the cylenders are numbered 1-4 toyour left 1 bieng the closest and 5-8 on your right 5 bieng the closest to you
brad

United States

#231 May 20, 2010
I just did my #7 today, its the 3rd coil from front of truck back on the drivers side. It goes 5,6,7,8 on dr side, 8 being next to the firewall
greg wrote:
i have a 1997 ford f150 5.4 - check engine light is on & runs rough - reads code p0307 ,P0307 Cylinder 7 Misfire Detected - dose anyone know the coil pack order - so i know what one to replace . i would do all 8 - but i only have enogh money for the one - i dont want to take out the wrong one , and i cant find nothing online about the order .
kevin

Salt Lake City, UT

#232 Jun 8, 2010
I have a 04 ford f-150 5.4 triton and it sounds like a diesel when it starts then it goes away after about 4 seconds it's really rough... then it runs fine for about 15 minutes then starts studdering and shaking in idol then it dies.I have heated up the cats to try to clear them out.I have an engine alarm for the camshaft position sensor so i changed it.but the problem did not go away.when it starts studdering it really sounds like a diesel engine.I have no idea what to do next.
michael rewis

United States

#233 Jul 11, 2010
i have a 1997 ford f 150 with a 5.4 v8 and i just got it and it runs like crap it has a system to lean b2,cylinder 7&8 misfire,and OBD2 monitor test/drive cycle not complet.. just got the truck can you help with theses problems... ty
bubba329

AOL

#234 Sep 18, 2010
I have a 1999 ford f150 5.4L and it is idling rough.gets worst when i put in gear.i have changed the plugs and cleaned the air filter and replaced the iac on it and reset the computer and it is still idking rough.could you tell me what else to check or do.
Brian

Hastings, MN

#235 Nov 8, 2010
Just purchased a 2003 f150 with only 57k. Wondering if anyone has comments or answers on the following. I hear what sounds like knocking when I first start up the truck. Mostly 1st thing in the morning. The sound goes away after a minute or two. Seems like once it starts to warm up it goes away. What do ya think??
JPC

Austin, TX

#236 Nov 21, 2010
I have a 2002 F-150 4.2L v-6..... It runs fine but idles so rough. It is very bad i have to push the clutch and tap the gas at the red light that is how bad it gets
JPC

Austin, TX

#237 Nov 21, 2010
Any help will be appreciated. Injectors maybe? somebody told me something about a vaccum seal or something? not sure
wayne

Lawrenceville, GA

#238 Dec 9, 2010
Brian wrote:
Just purchased a 2003 f150 with only 57k. Wondering if anyone has comments or answers on the following. I hear what sounds like knocking when I first start up the truck. Mostly 1st thing in the morning. The sound goes away after a minute or two. Seems like once it starts to warm up it goes away. What do ya think??
talked with ford, seems like after market oil
filters have a check valve .try changing to a motorcraft
filter.
wayne

Lawrenceville, GA

#239 Dec 9, 2010
ford dealer said aftermarket oil filters had a
check valve and suggested a motorcraft filter to
eliminate start up knock.
Pedro

Tampa, FL

#240 Jan 1, 2011
Hi,
I have a 2002 f150 Harley Davidson with about 55k miles. I have a rough idle usually sitting at a stop light feels like it is going to quit but goes away as soon as I start driving. The service engine soon light comes on and the code is p1115, intake air temp 2 ciruit high input.

So far I've:
replaced the up stream O2 sensors
spark plugs and coils
IAC
IAT
went to higher octane fuel
Used fuel additive
Used sea foam

Need some help figuring out this puzzle. Thanks
Pedro

Tampa, FL

#241 Jan 2, 2011
Found the problem, loose sensor.
Pedro wrote:
Hi,
I have a 2002 f150 Harley Davidson with about 55k miles. I have a rough idle usually sitting at a stop light feels like it is going to quit but goes away as soon as I start driving. The service engine soon light comes on and the code is p1115, intake air temp 2 ciruit high input.
So far I've:
replaced the up stream O2 sensors
spark plugs and coils
IAC
IAT
went to higher octane fuel
Used fuel additive
Used sea foam
Need some help figuring out this puzzle. Thanks

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