1999 Ford Truck Multiple cylinder misfire?

1999 FORD TRUCK
150,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
TSENTER
  • MEMBER
  • 1 POST
I have a 1999 F150 4wd, V8. I have been getting a variety of cylinder misfire codes on my OBD2 scanner. I have changed plugs, and even swaped coils around. Nothing seems to help.
Also my motor chugs at around 2000 rpm, when it's under a load (accelerating) it seems to run like a champ.
Any suggestions???
Nov 19, 2008 at 11:35 PM
Avatar
DAVE H
  • ✓Experienced Mechanic
  • 13,383 POSTS
try removing and cleaning/replacing CKP this sends firing signals to each cylinder if dirty or worn can cause misfire ??

CRANKSHAFT POSITION (CKP) SENSOR
NOTE:Engine front cover design precisely locates CKP sensor. No CKP sensor adjustment is necessary.

Removal & Installation
Disconnect negative battery cable. Raise and support vehicle. Unplug Crankshaft Position (CKP) sensor wire connector from engine harness. See Fig. 1. Remove CKP sensor mounting screws. Remove CKP sensor. To install, reverse removal procedure.
Fig. 1: Locating Crankshaft Position (CKP) Sensor (Typical)
Courtesy of FORD MOTOR CO.
Nov 20, 2008 at 11:05 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle