• 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.

#4 misfire 99 ford ranger 3.0 flex fuel


eaglerock

New Member
Joined
Aug 7, 2013
Messages
2
Reaction score
0
Points
0
Vehicle Year
99
Make / Model
ford
Transmission
Automatic
check engine light is on. did code reader. says #4 is misfiring. changed plugs and wires. still says misfire. ready to do compression test but don't know the psi for #4. 99 ford ranger 3.0 flex fuel can somebody help me
 


alwaysFlOoReD

Forum Staff Member
TRS Forum Moderator
TRS Banner 2012-2015
TRS 20th Anniversary
Joined
Apr 13, 2009
Messages
13,872
Reaction score
5,031
Points
113
Location
Calgary, Canada
Vehicle Year
'91, '80, '06
Make / Model
Ford, GMC,Dodge
Engine Size
4.0,4.0,5.7
Transmission
Manual
2WD / 4WD
4WD
I don't remember exact % but your #4 reading should be within 10% of the rest of the cylinders. You need to do all of them at the same time. Warm up engine. Remove all plugs. Ground sparkplug leads or prevent spark. Block throttle plate open. Then do test.

Richard
 

Casper34

New Member
Joined
Aug 3, 2013
Messages
12
Reaction score
0
Points
0
Vehicle Year
99
Make / Model
Ford
Transmission
Automatic
I don't remember exact % but your #4 reading should be within 10% of the rest of the cylinders. You need to do all of them at the same time. Warm up engine. Remove all plugs. Ground sparkplug leads or prevent spark. Block throttle plate open. Then do test.

Richard
Or he could just unplug the coil. It wont receive the signal to spark.

Sent from my Ktweaked PACmaned SGS3!
 

Sponsored Ad


Sponsored Ad

Staff online

Today's birthdays

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


Kirby N.
March Truck of The Month

Recently Featured

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

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top