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Got it all back together except for the rear vacuum tube, which I had to order. The job was actually not that bad, I spent most of the time cleaning the plenum and intake, was it ever gummed up. I used a nylon cleaning bit on the end of my 90 degree air grinder; worked beautifully. Once I removed all the crud, the seized butterfly valves freed up. I decided to do the last valve cover while I was there. Ford should have the line today, and the fuel pump will be in next week. The only real trouble I had was getting the bloody coolant and vacuum lines back on the rear of the plenum. I left a little skin behind. Again, Ill let you know how it comes together.
Another update. I finished the job on Friday, took out on a good drive and the codes came back. I'm also waiting on the fuel pump too. The good news is that it does run quite a bit smoother at hwy peed and seems to be much easier on fuel. The pump should be here tomorrow or next. Again after that I'll let you know how it work. If that doesn't, too friggin' bad, it's staying that way!
Did you change out the fuel filter? That's the next thing I'm going after, since I have those codes, but cannot find a vacuum leak anywhere, and I do not get any sputtering symptoms - just those @#$% codes, and a 25% increase in fuel trim. Fuel filter, and that differential fuel pressure "tank."
1998 SuperCab Lariat, K&N CAI, LED Halo headlights, LED gauge / temp / headlight switch panel mods
Ok, did the last thing on the list, changed the fuel pump, and still getting the codes! Any other suggestions, with everything I've done, I just don't know what else to do or look for.
When you replaced the upper intake manifold, did you replace the bolts as well, there are seals on the bolts that leak, majority of the time you can only find it when the engine is cold, hope this help
Yup new fuel filter, but I do not have "isolator bolts" on the plenum or intake. It has a metal plenum with only bolts. I had originally purchased the isolater bolts from Ford, only to find out when removed the plenum that there were only standard bolts for the intake and plenum! Now, for the last couple days, I've only been getting only the p0171 code, and it doesn't come on right away as it used to before all the work/replacement parts? Any thoughts on that?