Went fishin today...

On the way out of my local honey hole my truck started running rough, and the check engine light came on. about 300 yards later, it died. Started right back up, ran about 45 yards and died again. Did this 3-4 times before finally making my way to the highway.

Once on the highway it was running really rough. seemed like massive vibration(misfire). 4 miles later, I made it to a Circle K, and popped the hood. all the wires/plugs were dry, and seated. Couldnt really see an issue. Got back on the highway and headed home... 3-4 miles into the trip I heard a small backfire so I laid off the gas, upon doing this the vibrations went away. back on the gas, and everything is fine for 3-5 seconds and then vibrations again. Anything over 70 mph and the check engine light would flash quickly. Limped home after the sencond backfire... didnt want to cause any major damage. Got out my programmer, and checked codes... P0306, P0301, P1000.

I replaced the plugs, wires, and coil packs about 8 months ago.

1999 F150
4.6l 281
2WD


What the heck is wrong with this thing?

I read online about multiple misfires may be fuel issues, *or* catalytic convertors... I dont smell the rotten egg smell. Fuel filter was replaced about 8 months ago as well. Truck has not sat, this is my daily driver.

Thanks in advance.


oh yeah, it also sucked down the gas on the way home. Almost a 16th of a tank.

 

P0301 and P0306 are misfires on cylinders 1 and 6 fed by the coil pack on the right side. With new plugs, wires and coil packs I don't understand what could cause the misfires.

P1000 doesn't exist and is probably P0100, MAF circuit malfunction. If the MAF circuit is messing up, all sorts of problems will come along. Perhaps cleaning the MAF sensor electrodes will help. Use aerosol electronics parts cleaner and a very careful employment of a camel's hair artists' brush. .....take a look at the MAF sensor assembly and ascertain that some debris is not blocking the sensor port.

Look for a major air leak anywhere in the system below the throttle plate. Perhaps the evaporative fuel vapor control system has popped a vacuum line.

A long-shot is failure of an EGO sensor, but a failure would have thrown an error code.

 

Heres the rub,


Seeing as how cylinder 1 & 6 are misfiring it is possibly the coil pack? Gonna replace it, and see what happens.


Also, P1000 does exist, it is "monitor testing not complete" WTF that means I dunno.

 

The P1000 code on the ford reader says more driving needed. It is just telling you that it is not in a closed loop. Your misfire could be due to an O2 sensor also. If it is sending the wrong info it will load up on fuel and cause a misfire. Check your oil and see if it smells like gas. If it does this could be your problem, and the extra fuel is washing your cylinder walls taking a chance of more serious damage.

 

That code is not listed in my reference manual for my code reader....good to have a handle on it.

Lazedayv's reference to a faulty EGO sensor is well-founded. A failure of the sensor will definitely put the fuel management system out of closed-loop and raise all kinds of hell with the fuel mixture.

 

It was the right bank Coil. replaced it and all is well.

 

can someone please help ,I have a 2000 f150 4.6 4x4 that runs like crap when i drive it,lack of power but in neutral or park it revs up fine.I have replaced the plugs,checked the coil packs ,changed the DPFE,checked the egr .But with out a scan tool it makes it difficult.any advice would be greatly appreciated

 

Sounds like the fuel filter.I had the same symptons and tried the same remedy until I tried the fuel filter.Just curious,I thought the 2000 F150's all had the 5.4

 

I have a 1999 F-150 with the 4.6L. I am getting a a Service Engine Soon light (Steady, not flashing) all the time. There is NO noticeable performance degradation. It is running the same as before the code appeared.

Vato Zone used their scanner and it is a P0306, Misfire in Cylinder 6. I replaced the plug and it has not resolved this issue. When I removed the old plug, it was covered with sludgy oil.

Also, when the engine is running and I remove either the connector to the injector OR the spark plug wire for Cyl 6, I can hear the engine miss. I can hear the sparking (Clicking noise) when I remove the plug wire.

This is the 4.6 that has the coil packs on the front of the motor. 4 cylinders to each coil pack. Just wanted to clarify as I have seen some other forums where people expect the 4.6L to have a coil pack for each cylinder, which may be the case for other models but not for my Hoss. # Edited out some twiki/html code I was hoping would make this paragraph bold

I realize this thread is quite old and if a new thread is needed just say so, but my experience with forums is not to start a new thread if one is already out there if the subject matter is the same.

 

As it seems that the miss firing of your engine is not consistent and it does keep on having trouble with the exhaust as-well it seems the trouble might be with the fuel that you are using or it might be due to some dirt or some thing obstructing the required fuel flow to the engine so that it works at optimum. So better do get it checked.