Grandpa_truck
New Member
- Joined
- Apr 21, 2024
- Messages
- 3
- Reaction score
- 0
- Points
- 1
- Location
- California
- Vehicle Year
- 2000
- Make / Model
- Ford Ranger 3.0
- Transmission
- Automatic
Hello All,
First post / new member. Thanks for this forum!
I need some help with my Ranger.
Vehicle:
2000 Ford Ranger
RWD
Automatic Transmission
3.0 Flex Fuel
202,700 miles
Coolant leak at timing cover
Slight rear main leak
Story:
Yesterday, my truck started running rough after coming to a stoplight. The idle dropped and acted like the engine would die. This has happened before, but it would be minor (slight miss could be felt in the seat, but no check engine light and the idle would smooth out).
Let the truck sit overnight and this morning had the misfire as soon as it was started. The check engine light then came on. Drove to Oriely and borrowed the scanner to find code P0304. While driving, I could feel the miss but the engine still had good power.
Bought plugs (Motorcraft SP-500) and wires, if I needed them. Drove home and pulled the number 4 plug to find the tip was worn flat. I thought bingo, problem solved.
So then I proceeded to change all spark plugs. The wires were replaced 2 years ago and looked to be in good condition. I changed all the plugs and noticed cylinder 5 plug was worn nearly flat as well (think this is due to the waste spark system I read about).
I was so happy I thought I fixed the problem to find the truck to still have a rough idle after changing all plugs. The engine sounded good when revving it, but the engine was shaking and missing when idling.
I then read this thread about the firing order (https://www.therangerstation.com/forums/index.php?threads/2000-ranger-three-point-oh-3-0-firing-order.185020/).
It states that the plugs can be swapped (in their associated pairs) as copied:
3 4
2 6
1 5
OR
1 5
2 6
3 4
I then tried swapping wires from the first orientation stated above:
3 4
2 6
1 5
To
1 5
2 6
3 4
I tried to start the truck at it barely idled then died after a second. I then swapped the wires back to:
3 4
2 6
1 5
This was the orientation when I changed the plugs (did not touch the wires on the coil pack) and had the miss.
Trying to start the truck, the engine behaves the same as the swapped wire orientation:
1 5
2 6
3 4
Any ideas what could be wrong now? Clearly I have the miss for some reason and I just created another problem. I have read if the coil is wired incorrectly it will work, but not properly.
I'm stumped!
First post / new member. Thanks for this forum!
I need some help with my Ranger.
Vehicle:
2000 Ford Ranger
RWD
Automatic Transmission
3.0 Flex Fuel
202,700 miles
Coolant leak at timing cover
Slight rear main leak
Story:
Yesterday, my truck started running rough after coming to a stoplight. The idle dropped and acted like the engine would die. This has happened before, but it would be minor (slight miss could be felt in the seat, but no check engine light and the idle would smooth out).
Let the truck sit overnight and this morning had the misfire as soon as it was started. The check engine light then came on. Drove to Oriely and borrowed the scanner to find code P0304. While driving, I could feel the miss but the engine still had good power.
Bought plugs (Motorcraft SP-500) and wires, if I needed them. Drove home and pulled the number 4 plug to find the tip was worn flat. I thought bingo, problem solved.
So then I proceeded to change all spark plugs. The wires were replaced 2 years ago and looked to be in good condition. I changed all the plugs and noticed cylinder 5 plug was worn nearly flat as well (think this is due to the waste spark system I read about).
I was so happy I thought I fixed the problem to find the truck to still have a rough idle after changing all plugs. The engine sounded good when revving it, but the engine was shaking and missing when idling.
I then read this thread about the firing order (https://www.therangerstation.com/forums/index.php?threads/2000-ranger-three-point-oh-3-0-firing-order.185020/).
It states that the plugs can be swapped (in their associated pairs) as copied:
3 4
2 6
1 5
OR
1 5
2 6
3 4
I then tried swapping wires from the first orientation stated above:
3 4
2 6
1 5
To
1 5
2 6
3 4
I tried to start the truck at it barely idled then died after a second. I then swapped the wires back to:
3 4
2 6
1 5
This was the orientation when I changed the plugs (did not touch the wires on the coil pack) and had the miss.
Trying to start the truck, the engine behaves the same as the swapped wire orientation:
1 5
2 6
3 4
Any ideas what could be wrong now? Clearly I have the miss for some reason and I just created another problem. I have read if the coil is wired incorrectly it will work, but not properly.
I'm stumped!