When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
As I recall, the 99 is the only year that came with the aluminum intake with PI heads. It's possible it was swapped. BUT, I do agree with you, it should have been plastic from the factory.
EDIT: Maybe that's only the 5.4 though.... now that I am thinking a little harder, maybe the 4.6 didn't get PI heads until mid 2000 or 2001?
OMG. You've made like a million posts on this forum and you don't know what a 4.6 truck intake looks like. Here is a pic of a 2007 F150. Notice the material that the intake manifold is made of. Are you going to suggest it didn't get PI heads yet?
Hey Ray..... what is your problem with me? Do you seek out my posts now because I disagree with you on the 8.8 diff? You've got a vendetta for me now. I'm sorry I hurt your feelings because I didn't agree with your assessment. You consistently seek out MY posts and have some snide comments.
Maybe you should read my EDIT which is in your post.
I promise there is no personal beef with you. If you post factually incorrect info on an automotive forum, you should be corrected- no? I also corrected Jimboy. If you post incorrect stuff a lot then you get corrected a lot.
Your edit implies that the truck's 4.6 2v would have gotten a plastic intake when they went to PI heads. They did not, so it's not like your edit walked anything back.
I agree with you on the intake being metal. However, your post said "Are you going to suggest it didn't get PI heads yet?". In my edit, I said the 4.6 got PI heads in late 2000 (we've seen them on here) and 2001.
I had the intake confused metal/plastic intake confused with the 5.4, and tried to elude to that in my edit.
Thank you for clarifying what I was trying to correct with my EDIT. I promise, we're on the same page and I agree with what you posted - but apparently my edit did not convey that properly.
I don’t have the truck at home, it’s at the shop, so I can’t see the casting #’s. I know for a fact it has a metal (assuming aluminum) upper intake. The lower intake is plastic. Does this (aluminum upper) mean it has PI heads? It’s a 2002, not an ‘07.
I don’t have the truck at home, it’s at the shop, so I can’t see the casting #’s. I know for a fact it has a metal (assuming aluminum) upper intake. The lower intake is plastic. Does this (aluminum upper) mean it has PI heads? It’s a 2002, not an ‘07.
Yes, you should have PI heads. And yes, it will be an aluminum upper with the plastic lower. I have actually seen a metal lower on Rock Auto before, FWIW. It's a Dorman though, as I recall.
I agree with Ray and BBXL though, if indeed that intake IS cracked, the codes you posted don't line up with a crack. It should be lean, not rich.
Yep, I don’t see a lower anywhere for this year, motor, etc. Well, eBay has used intakes...or I could pull one from a junkyard. Still hoping this is just a gasket issue.
ive noticed some of the 5.4 intakes from Dorman and others, are a one piece design. Maybe they’ve learned that the 2 piece design isn’t all that great.
I look at it and wonder what was the point? Why 2 piece? Why that lower section so huge to begin with? I digress...
I wonder if a big crack could cause misfires which could then allow excess fuel to the O2 sensors to give a P0175 code. Maybe the crack is the cause of the code and the poor running.
Your mechanic said he could fix the crack so why are you looking for a replacement? Even if his fix is temporary it will at least tell you if the crack is the source of the problem. I'd go for the quick dirty fix just to see if it makes things right.
Just helping refocus...
p.s. if you could post the video of the smoke test that would be cool.
Last edited by BareBonesXL; 02-23-2021 at 11:37 AM.
I've never used a Dorman intake on a 2V. Just a 3V, and I was not impressed. In fact, the only reason I used it is because the person I did it for was the biggest tight wad on the planet. If it would have been my truck, I would have shipped it back. However, they insisted I use it.
In the end, it worked, but I was not very enthusiastic about their changes they made. The boss for the fuel rail bolts did not come pre-threaded, and neither did the IMRC mounts. As I recall, it came with a different screw, much like a grabber screw. They also changed the design of the manifold gaskets, which will force you to use their gaskets only henceforth.
As far your question on it being two piece.... well, my own guess is that the extra capacity below helps with low end torque. I don't know why it's like that. I'm sure Ray could answer the reasoning better than I.
02-23-2021, 09:01 AM
