5.4 highway patrol f150
#1
5.4 highway patrol f150
Hey everybody. I just bought a 2010 f150 at an action in Phx AZ, Its a former highway patrol truck. I bought the truck as is. All the description said was, Its runs and drives, and was in fair conditions. The interior of the truck looked hardly used at 150,000 miles. $5000. So I bought it. I noticed it had what I thought, seemed to be a u joint, jerking, and ticking problem in the engine. Drove it from Phx to Tucson. and it started rough stumbling and knocking sound, after the 90 mile trip. Engine light came on with a PO306 code(misfire #6). went to start it the next morning and the knocking noise was more severe( like hitting a plastic can with a stick sound). Sound seems to be from the upper part of the engine.
I was wondering if anyone can point me in the right direction as to where to start looking. I have absolutely no knowledge with the 5.4 3v engine. I pulled the plug from #6 and it was charred up pretty good.
I was wondering if anyone can point me in the right direction as to where to start looking. I have absolutely no knowledge with the 5.4 3v engine. I pulled the plug from #6 and it was charred up pretty good.
#2
If it's only one cylinder, then first suspect would either be leaking injector or faulty coil. The easiest is replacing the coil and trying that.
Though, at 150k, I would replace all of the plugs and coils. Use only Motorcraft.
In fact, since it was probably classified as "heavy service", I would recommend doing a full tune up on it. Including flushing the coolant.
If you search, you'll find a bunch of good information about the 5.4l 3v.
As for parts, I recommend Rockauto or Tasca.
Good luck.
Though, at 150k, I would replace all of the plugs and coils. Use only Motorcraft.
In fact, since it was probably classified as "heavy service", I would recommend doing a full tune up on it. Including flushing the coolant.
If you search, you'll find a bunch of good information about the 5.4l 3v.
As for parts, I recommend Rockauto or Tasca.
Good luck.
#4
As stated, a possible phaser knock but that usually sounds more like a diesel engine knock. I'd also be looking for a cam follower gone bad. Pulling a valve cover can pretty much tell you about that. Might try to localize the sound using the stick method. Get a stick of about 3 feet in length and place it on different parts of the engine. Put your hand over the other end and put your ear on your hand. It's a poorboy stethoscope. I'd start at cylinder #6. If the exhaust cam follower is bad, the engine will keep cramming fuel into a cylinder that that exhaust side isn't working right and will foul the the plug.
#5
As stated, a possible phaser knock but that usually sounds more like a diesel engine knock. I'd also be looking for a cam follower gone bad. Pulling a valve cover can pretty much tell you about that. Might try to localize the sound using the stick method. Get a stick of about 3 feet in length and place it on different parts of the engine. Put your hand over the other end and put your ear on your hand. It's a poorboy stethoscope. I'd start at cylinder #6. If the exhaust cam follower is bad, the engine will keep cramming fuel into a cylinder that that exhaust side isn't working right and will foul the the plug.
#7
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#8
I ordered new lifters and rollers. Was thinking about reusing the camshaft. It's marred up, but no deep scratches or chunks missing. Anybody have any thoughts? To reuse or replace cam?