- Joined
- Aug 7, 2007
- Messages
- 1,651
- Reaction score
- 5
- Points
- 0
- Location
- Denver Colorado
- Vehicle Year
- 79-00
- Make / Model
- Mostly Ford.
- Engine Size
- Building a 408w
- Transmission
- Automatic
2000 Ranger, 3.0 Flex, 130,000 miles.
After dealing with a bunch of fuel problems, now I have a really bad missfire.
It crept up on me all of the sudden and now my truck can't even get out of it's own way.
It only misses under a load. When I rev it in neutral it sounds fine.
It's horrible in the lower RPMs (3300 and lower) and then it gets better (still there though) as I wrap it up.
I have a fuel pressure guage hooked up to the valve on the pass. side fuel rail. I can watch the needle flutter with the sound of the miss through the exhaust.
I've got no get up and go, and it seems to hang out at about 2500 RPMs till it picks up.
I replaced plugs and wires, cam position sensor, cleaned the MAFsensor, and did a vaccume leak test. I don't hear a churp so I don't think it's the syncro.
Here's the weird thing, I ran a can of seafoam through the line running into the vaccume booster, and for about 3 minutes it ran like a bat out of hell. Then it went back to the miss.
Stuck valve?
I've got no CEL, or maybe the bulb is burned out. I'll try and have them pull codes this afternoon.
Any input would be great!
Thanks,
LBF
After dealing with a bunch of fuel problems, now I have a really bad missfire.
It crept up on me all of the sudden and now my truck can't even get out of it's own way.
It only misses under a load. When I rev it in neutral it sounds fine.
It's horrible in the lower RPMs (3300 and lower) and then it gets better (still there though) as I wrap it up.
I have a fuel pressure guage hooked up to the valve on the pass. side fuel rail. I can watch the needle flutter with the sound of the miss through the exhaust.
I've got no get up and go, and it seems to hang out at about 2500 RPMs till it picks up.
I replaced plugs and wires, cam position sensor, cleaned the MAFsensor, and did a vaccume leak test. I don't hear a churp so I don't think it's the syncro.
Here's the weird thing, I ran a can of seafoam through the line running into the vaccume booster, and for about 3 minutes it ran like a bat out of hell. Then it went back to the miss.
Stuck valve?
I've got no CEL, or maybe the bulb is burned out. I'll try and have them pull codes this afternoon.
Any input would be great!
Thanks,
LBF