2002 Ford Ranger Edge 3.0 67k
Hey guys,
I know I'm beating a dead horse about my truck, but I am about to lose my mind with this. I did a compression test this past Sunday and cylinders 1,2,3,4,5,6 were 165,164,160,160,165,170 respectively. My compression seemed good.
I thought I had fixed the rough idle by replacing the coil pack, but no. Also, tonight on my way home from work at 60-65mph on the interstate I feel what feels like a misfire. It's not bad enough to be scary, but it's noticeable. I pulled off my exit to a stop sign and magically there's no rough idle. Engine was purring. After pulling off, I get to around 50 mph and I feel the "misfire" again. The next 18 miles until I arrived home would produce the "misfire" between 40-50 mph. The symptoms don't exactly match what I have researched as possible culprits.
Bad/faulty fuel injector(s)- wouldn't this produce a more constant misfire and rough idle? Fuel economy seems decent for the age of the truck. First full tank of highway miles produced 335ish miles on a 16.5 gallon tank.
O2 sensor(s)- no rotten egg smell that I have read about associated with this and again fuel economy doesn't seem affected.
Engine has no EGR valve.
No check engine light or codes....
Replaced parts- coil pack, plugs, plug wires, serpentine belt/tensioner/idler pulley(needed changing), cam sensor and synchronizer, and fuel filter.
I'm out of ideas guys.
Hey guys,
I know I'm beating a dead horse about my truck, but I am about to lose my mind with this. I did a compression test this past Sunday and cylinders 1,2,3,4,5,6 were 165,164,160,160,165,170 respectively. My compression seemed good.
I thought I had fixed the rough idle by replacing the coil pack, but no. Also, tonight on my way home from work at 60-65mph on the interstate I feel what feels like a misfire. It's not bad enough to be scary, but it's noticeable. I pulled off my exit to a stop sign and magically there's no rough idle. Engine was purring. After pulling off, I get to around 50 mph and I feel the "misfire" again. The next 18 miles until I arrived home would produce the "misfire" between 40-50 mph. The symptoms don't exactly match what I have researched as possible culprits.
Bad/faulty fuel injector(s)- wouldn't this produce a more constant misfire and rough idle? Fuel economy seems decent for the age of the truck. First full tank of highway miles produced 335ish miles on a 16.5 gallon tank.
O2 sensor(s)- no rotten egg smell that I have read about associated with this and again fuel economy doesn't seem affected.
Engine has no EGR valve.
No check engine light or codes....
Replaced parts- coil pack, plugs, plug wires, serpentine belt/tensioner/idler pulley(needed changing), cam sensor and synchronizer, and fuel filter.
I'm out of ideas guys.
Last edited: