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| 2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs |
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#11
Thu, February 17th, 2011, 05:53 PM
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Quote:
What did you use for the replacement spark plugs?
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SENIOR MODERATOR--PTLA God doesn't have a Facebook but he's my friend. God doesn't have a twitter, but I follow him. 
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#12
Thu, February 17th, 2011, 06:10 PM
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Car Quest on the coil packs and Auto Zone for the original spark plugs replacements. Camshaft sensor?
__________________
2nd place is 1st's loser! 2012 FX4 Waldoch M80 Edition Supercrew, 3.5L Ecoboost, Flowmaster Exhaust, K&N Air Filter, Road Armor Grill Guard, huge smile! 
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#13
Thu, February 17th, 2011, 07:09 PM
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Quote:
Could also be... Vct solenoids....both banks... It bites when you don't get stored codes...
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SENIOR MODERATOR--PTLA God doesn't have a Facebook but he's my friend. God doesn't have a twitter, but I follow him.
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#14
Thu, February 17th, 2011, 09:32 PM
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As per my mechanic I drove to try and create a DTC code. I put 8 new quality coil packs on earlier and replace both cam shaft sensors that was suggested on another forum. With all that I have replaced the spark plugs and spring caps about a month ago. When I went down the interstate it really made my engine jerk and I could hear what sounded like back firing. Like little pops in the exhaust system??? Please help, I am at a lose for ideas. If it matters, when it idles it is flawless. If I rev the engine in park, flawless! Drive slowly and accelerate slowly, seems good. Go faster and bam, it is hesitating/jerky/and little pops in the exhaust (i think).
__________________
2nd place is 1st's loser! 2012 FX4 Waldoch M80 Edition Supercrew, 3.5L Ecoboost, Flowmaster Exhaust, K&N Air Filter, Road Armor Grill Guard, huge smile!
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#15
Thu, February 17th, 2011, 10:27 PM
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Okay...please read carefully....
Have you.... Cleaned the tb Cleaned the maf Changed the fuel filter ?????????????????????????? Also... Are you now on your NEW second set of spark plugs, springs, and coils? Or still the first? I see new cam sensors Other possibilities... Vct solenoids both banks Fuel injectors
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SENIOR MODERATOR--PTLA God doesn't have a Facebook but he's my friend. God doesn't have a twitter, but I follow him.
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#16
Thu, February 17th, 2011, 10:55 PM
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I had my fuel injection system cleaned at Big 'O Tires. This my first set (just put them on). I just don't know what is up. My truck has been maintained properly as far as changing out things. What I don't know is what do do next. There is no codes. But it does misfire/hesitate/backfire when accelerating. Nothing seems wrong when at an idle or while in park and reving the engine up.
__________________
2nd place is 1st's loser! 2012 FX4 Waldoch M80 Edition Supercrew, 3.5L Ecoboost, Flowmaster Exhaust, K&N Air Filter, Road Armor Grill Guard, huge smile!
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#17
Fri, February 18th, 2011, 12:10 AM
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I am thinking that the VCT Solenoid could be the issues after reading up on it. I have replaced both cam shaft sensors, all 8 coil packs today. Anything else I should try? EGR sensor?
__________________
2nd place is 1st's loser! 2012 FX4 Waldoch M80 Edition Supercrew, 3.5L Ecoboost, Flowmaster Exhaust, K&N Air Filter, Road Armor Grill Guard, huge smile!
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#18
Fri, February 18th, 2011, 08:48 AM
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This is increasingly frustrating! No codes! Just a hard hesitation that jerks the truck and sounds like a back fire or poping noise up front. When I let off the truck runs great. If I accelerate it does the jerking and back firing. Rev it in park, nothing. Rev it in neutral, nothing. Anything more on if this could.be caused by the VCT Solenoid?
__________________
2nd place is 1st's loser! 2012 FX4 Waldoch M80 Edition Supercrew, 3.5L Ecoboost, Flowmaster Exhaust, K&N Air Filter, Road Armor Grill Guard, huge smile!
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