Rough Idle/Misfiring - HELP! (2006 F150 5.4L v8)
09-17-2015, 08:44 AM
#11
Mark
iTrader: (1)
Cat's ??
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Justin Warner (04-01-2020)
09-17-2015, 09:06 AM
#12
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Bryan Braswell (03-27-2020)
09-17-2015, 09:50 AM
#13
Mark
iTrader: (1)
If you been running the truck with a mis-fire condition you could of been dumping raw gas into your Cats which will cause clogging... normally you can tell by a sulfur or rotten egg smell or they start to get really hot after reaching operating temp... to where they will glow red... this will cause a miss...
09-17-2015, 11:11 AM
#14
If you been running the truck with a mis-fire condition you could of been dumping raw gas into your Cats which will cause clogging... normally you can tell by a sulfur or rotten egg smell or they start to get really hot after reaching operating temp... to where they will glow red... this will cause a miss...
I've been using another vehicle and running the truck as little as possible for that very reason - so the fuel doesn't burn up the converter. Fuel can be smelled occasionally from the exhaust.
The misfire starts immediately upon startup before anything gets hot.
09-17-2015, 11:22 AM
#15
Mark
iTrader: (1)
If you can smell fuel from the exhaust, I think that's a problem... could also have a fouled 02 sensor in the system.
09-17-2015, 11:34 AM
#16
Senior Member
what codes are stored and which cylinders are mis-firing?
It is common for the rocker rollers to seize and break, which causes a mis fire, this seems to happen more of the right head.
It is common for the rocker rollers to seize and break, which causes a mis fire, this seems to happen more of the right head.
09-17-2015, 11:40 AM
#17
Mark
iTrader: (1)
Did you not read his post ??
Pulled into Autozone and scanned P0300, P0301, P0305. Misfires cylinders 1 & 5.
10-03-2015, 12:12 AM
#18
Junior Member
I am completely stumped here. I just bought a 2006 F150 with the 5.4l 3 valve triton engine about 5 months ago with 85K mi on it. Now at 90K the truck out of the blue starts to idle rough and shortly after the check engine light begins flashing. Pulled into Autozone and scanned P0300, P0301, P0305. Misfires cylinders 1 & 5.
Here is what I have checked so far:
-Spark Plugs (replaced)
-Coils (swapped, problem did not follow coil)
-Fuel Injectors (swapped, problem did not follow injector)
-Cam Sensor
-MAF Sensor
-Compression Check (engine has good compression)
-VCT Solenoids (replaced, problem seem to very slightly improved but still idling rough)
The misfire really is only noticeable at idle and as soon as you press the gas it's barely noticeable at all at higher rpms. There is also NO rattling or NO ticking or clicking noises during startup or any other time. This led me to believe it was the VCT solenoid instead of something like the cam phasers but apparently I was wrong. Could it be possible there are other error codes that haven't been thrown yet? Surely there has to be a little more than just two misfires - how do you work with such a vague code or am I not fully understanding them?
I'm about ready to throw in the white flag on this and take it in to the dealership - which I fear I will be told it's major $$$$. This seems to be a common problem with these trucks however every thread I find regarding this issue on any forum just dies dead in its track with no solution.
I guess my next step is to check the "real" oil pressure and see if there's any oil flow issues?
Has anyone solved this problem?
Here is what I have checked so far:
-Spark Plugs (replaced)
-Coils (swapped, problem did not follow coil)
-Fuel Injectors (swapped, problem did not follow injector)
-Cam Sensor
-MAF Sensor
-Compression Check (engine has good compression)
-VCT Solenoids (replaced, problem seem to very slightly improved but still idling rough)
The misfire really is only noticeable at idle and as soon as you press the gas it's barely noticeable at all at higher rpms. There is also NO rattling or NO ticking or clicking noises during startup or any other time. This led me to believe it was the VCT solenoid instead of something like the cam phasers but apparently I was wrong. Could it be possible there are other error codes that haven't been thrown yet? Surely there has to be a little more than just two misfires - how do you work with such a vague code or am I not fully understanding them?
I'm about ready to throw in the white flag on this and take it in to the dealership - which I fear I will be told it's major $$$$. This seems to be a common problem with these trucks however every thread I find regarding this issue on any forum just dies dead in its track with no solution.
I guess my next step is to check the "real" oil pressure and see if there's any oil flow issues?
Has anyone solved this problem?
10-06-2015, 01:00 PM
#19
This happened to my truck. The seal that connects the radiator to the engine had a leak and it was draining down and around the sparkplugs/ coils. I replaced that radiator gasket and that fixed it.
10-14-2015, 10:33 PM
#20
Junior Member
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I am completely stumped here. I just bought a 2006 F150 with the 5.4l 3 valve triton engine about 5 months ago with 85K mi on it. Now at 90K the truck out of the blue starts to idle rough and shortly after the check engine light begins flashing. Pulled into Autozone and scanned P0300, P0301, P0305. Misfires cylinders 1 & 5.
Here is what I have checked so far:
-Spark Plugs (replaced)
-Coils (swapped, problem did not follow coil)
-Fuel Injectors (swapped, problem did not follow injector)
-Cam Sensor
-MAF Sensor
-Compression Check (engine has good compression)
-VCT Solenoids (replaced, problem seem to very slightly improved but still idling rough)
The misfire really is only noticeable at idle and as soon as you press the gas it's barely noticeable at all at higher rpms. There is also NO rattling or NO ticking or clicking noises during startup or any other time. This led me to believe it was the VCT solenoid instead of something like the cam phasers but apparently I was wrong. Could it be possible there are other error codes that haven't been thrown yet? Surely there has to be a little more than just two misfires - how do you work with such a vague code or am I not fully understanding them?
I'm about ready to throw in the white flag on this and take it in to the dealership - which I fear I will be told it's major $$$$. This seems to be a common problem with these trucks however every thread I find regarding this issue on any forum just dies dead in its track with no solution.
I guess my next step is to check the "real" oil pressure and see if there's any oil flow issues?
Has anyone solved this problem?
Here is what I have checked so far:
-Spark Plugs (replaced)
-Coils (swapped, problem did not follow coil)
-Fuel Injectors (swapped, problem did not follow injector)
-Cam Sensor
-MAF Sensor
-Compression Check (engine has good compression)
-VCT Solenoids (replaced, problem seem to very slightly improved but still idling rough)
The misfire really is only noticeable at idle and as soon as you press the gas it's barely noticeable at all at higher rpms. There is also NO rattling or NO ticking or clicking noises during startup or any other time. This led me to believe it was the VCT solenoid instead of something like the cam phasers but apparently I was wrong. Could it be possible there are other error codes that haven't been thrown yet? Surely there has to be a little more than just two misfires - how do you work with such a vague code or am I not fully understanding them?
I'm about ready to throw in the white flag on this and take it in to the dealership - which I fear I will be told it's major $$$$. This seems to be a common problem with these trucks however every thread I find regarding this issue on any forum just dies dead in its track with no solution.
I guess my next step is to check the "real" oil pressure and see if there's any oil flow issues?
Has anyone solved this problem?