• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

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


red Ranger (Sarah)3.0L

Well-Known Member
Ford Technician
Joined
Oct 2, 2024
Messages
58
Reaction score
9
Location
RI
Vehicle Year
2003
Make / Model
Ford Ranger
Transmission
Automatic
yes the plugs coil and wires are all changed and the old spark plugs looked good i will get some pics tomorrow
 


pentode

Well Known Cheapskate
Supporting Member
Ham Radio Operator
Joined
Apr 30, 2024
Messages
708
Reaction score
873
Location
Moncton NB
Vehicle Year
2005
Make / Model
Ford Ranger
Engine Type
3.0 V6
Transmission
Automatic
2WD / 4WD
2WD
Ok.... Well that seems like most of the easy stuff ruled out. As was mentioned, cam synchro is possible, and or wiring to it. I guess wiring to the coil pack is possible too. I'll keep thinking about it but I'm sure someone else will jump in here soon.
 

red Ranger (Sarah)3.0L

Well-Known Member
Ford Technician
Joined
Oct 2, 2024
Messages
58
Reaction score
9
Location
RI
Vehicle Year
2003
Make / Model
Ford Ranger
Transmission
Automatic
right you think it could be gaskets like intake gasket and or the ecm ? if I cant figure it out by November I might just take it to a shop but I would like to find out why this is happening it's so bizarre
 

pentode

Well Known Cheapskate
Supporting Member
Ham Radio Operator
Joined
Apr 30, 2024
Messages
708
Reaction score
873
Location
Moncton NB
Vehicle Year
2005
Make / Model
Ford Ranger
Engine Type
3.0 V6
Transmission
Automatic
2WD / 4WD
2WD
right you think it could be gaskets like intake gasket and or the ecm ? if I cant figure it out by November I might just take it to a shop but I would like to find out why this is happening it's so bizarre
It's possible it could be either of those things but I'd still tend to look for simpler solutions first. Are the misfires staying consistently on those 3 cylinders?
Have you checked all the wiring going to the injectors including the big bulk connector on the driver's side of the intake?
 

Ranger850

Doesn't get Sarcasm . . .
TRS 20th Anniversary
Joined
Jan 24, 2018
Messages
8,554
Reaction score
4,881
Location
Tallahassee Florida
Vehicle Year
2001
Make / Model
Ford
Engine Size
Born with a 3.0, looking for a donor V8
Transmission
Manual
2WD / 4WD
2WD
Total Lift
Stock 2"
Tire Size
Stock
My credo
Doing things wrong, until I get it right.
Could it possibly bethe timing is off?
 

red Ranger (Sarah)3.0L

Well-Known Member
Ford Technician
Joined
Oct 2, 2024
Messages
58
Reaction score
9
Location
RI
Vehicle Year
2003
Make / Model
Ford Ranger
Transmission
Automatic
It's possible it could be either of those things but I'd still tend to look for simpler solutions first. Are the misfires staying consistently on those 3 cylinders?
Have you checked all the wiring going to the injectors including the big bulk connector on the driver's side of the intake?
it sound like its a consistent misfire and i checked the wires but not the main connector also there is alot of debris around the injectors oh and i looked at the pcv valve and it seems loose like the grommet is worn or something but no oil around it but i will check the things you said again thank you
 

red Ranger (Sarah)3.0L

Well-Known Member
Ford Technician
Joined
Oct 2, 2024
Messages
58
Reaction score
9
Location
RI
Vehicle Year
2003
Make / Model
Ford Ranger
Transmission
Automatic
Could it possibly bethe timing is off?
i was thinking that, i mean it happened so suddenly but would timing only affect 3 cylinders? also i am not quite sure its a consistent misfire it sounds like it so it could very well be timing
 

pentode

Well Known Cheapskate
Supporting Member
Ham Radio Operator
Joined
Apr 30, 2024
Messages
708
Reaction score
873
Location
Moncton NB
Vehicle Year
2005
Make / Model
Ford Ranger
Engine Type
3.0 V6
Transmission
Automatic
2WD / 4WD
2WD
it sound like its a consistent misfire and i checked the wires but not the main connector also there is alot of debris around the injectors oh and i looked at the pcv valve and it seems loose like the grommet is worn or something but no oil around it but i will check the things you said again thank you
Do you still have your old coil pack? If it were me I'd swap it back in and see if the misfires stay in the same place.
 

red Ranger (Sarah)3.0L

Well-Known Member
Ford Technician
Joined
Oct 2, 2024
Messages
58
Reaction score
9
Location
RI
Vehicle Year
2003
Make / Model
Ford Ranger
Transmission
Automatic
Do you still have your old coil pack? If it were me I'd swap it back in and see if the misfires stay in the same place.
hmm i do have my old coil pack i could try that but actually it is consistent because when i hard start it i can hear a consistent Gallup
 

pentode

Well Known Cheapskate
Supporting Member
Ham Radio Operator
Joined
Apr 30, 2024
Messages
708
Reaction score
873
Location
Moncton NB
Vehicle Year
2005
Make / Model
Ford Ranger
Engine Type
3.0 V6
Transmission
Automatic
2WD / 4WD
2WD
hmm i do have my old coil pack i could try that but actually it is consistent because when i hard start it i can hear a consistent Gallup
OK but if it misfires on the exact same 3 cylinders that's a good data point.
 

red Ranger (Sarah)3.0L

Well-Known Member
Ford Technician
Joined
Oct 2, 2024
Messages
58
Reaction score
9
Location
RI
Vehicle Year
2003
Make / Model
Ford Ranger
Transmission
Automatic
OK but if it misfires on the exact same 3 cylinders that's a good data point.
Right I believe it’s just those 3 and like I said I did a compression test on number 1 and it was like 175 psi so I don’t think it’s compression
 

bobbywalter

TRS Technical Staff
TRS Event Staff
V8 Engine Swap
TRS Technical Advisor
TRS Banner 2012-2015
TRS 20th Anniversary
Ugly Truck of Month
TRS Event Participant
TRS 25th Anniversary
Joined
Aug 9, 2007
Messages
24,692
Reaction score
6,062
Location
woodhaven mi
Vehicle Year
1988
Make / Model
FORD mostly
Engine Type
V8
Engine Size
BIGGER
Transmission
Automatic
2WD / 4WD
4WD
Total Lift
sawzall?
Tire Size
33-44
My credo
it is easier to fix and understand than "her"
is it losing coolant ?


spray it down in the dark
 

red Ranger (Sarah)3.0L

Well-Known Member
Ford Technician
Joined
Oct 2, 2024
Messages
58
Reaction score
9
Location
RI
Vehicle Year
2003
Make / Model
Ford Ranger
Transmission
Automatic
is it losing coolant ?


spray it down in the dark
I don’t believe it’s losing coolant so I am thinking not a head gasket also what will spraying it in the dark do is that something to do with spark?
 

bobbywalter

TRS Technical Staff
TRS Event Staff
V8 Engine Swap
TRS Technical Advisor
TRS Banner 2012-2015
TRS 20th Anniversary
Ugly Truck of Month
TRS Event Participant
TRS 25th Anniversary
Joined
Aug 9, 2007
Messages
24,692
Reaction score
6,062
Location
woodhaven mi
Vehicle Year
1988
Make / Model
FORD mostly
Engine Type
V8
Engine Size
BIGGER
Transmission
Automatic
2WD / 4WD
4WD
Total Lift
sawzall?
Tire Size
33-44
My credo
it is easier to fix and understand than "her"
yes ....

spray it and check for arcing or if it dies
 

Sponsored Ad


Sponsored Ad

Staff online

Today's birthdays

TRS Events

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Rick W
October Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Vagabond Video

25th Anniversary Merch

Follow TRS On Instagram

25th Anniversary Sponsors

TRS-3 Ford Ranger Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top