Hey man I decided to start another thread, but I took it all apart finally. And I have pictures. I unfortunately forgot to take them at first, but I took some as I was taking it apart.

This was while I was taking everything apart.


And this was the culprit of all my EGR problems. I had no idea that the tubes went into the throttle body like that. I thought it was a straight port.

But with some screwdriver picks and some carb cleaner later. I got them all cleaned out (I think this picture is when they were part way cleaned out, but you catch my drift)



I still am getting the 1408, but when I put vacuum on the EGR valve the engine stalled big time. I cant think of anything else to do. BUT thanks a ton!

 

HEY! A Jbrew thread!

How fricken boring, just engine pics



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Engine compartment looks good from what I can see. - Looks like she's in good shape, -how many miles?

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Well, one problem solved , - Good job! - Nice pics

You'll get better MPG's now, - allot better on the e-way and @ all cruising speeds. - That's a bonus you probably weren't aware of lol.

Yea, there's still a problem in the circuit w/1408. I would test the DPFE as outlined in your other thread, -to confirm ALL numbers for that sensor as passable. I recall one of the readings you had was way out of range. So, you might want to go over that thread and confirm.

I think you have a bad wire somewhere for that one.

 

Well, new news about the whole EGR issue. After doing that whole "clean out the throttle body thing" I did not realize that I forgot to dis-connect the negative. So I used the scanner to clear the code, and it came right back. Naturally, I opened it all back up and tested stuff, and then realized that I needed to disconnect the battery so the computer can re-learn(but this time with EGR).It has been CEL free since the morning after.

 

Yea, disconnecting the Neg is a pretty BIG deal. You don't want to forget to do that when doing just about any work under the hood. That's a No No lol. You can fry the PCM real easy - or screw it all up beyond repair with just one slip of the wrench.

Besides that, there's other reasons. When ever you do any kind of that involves air intake, air metering (maf), fuel, -you want to reset the KeepAliveMemory (KAM). This resets AirFuelRatios (AF's) and Trans Tables.

For instance,-changing a dirty air filter can change the way the trans shifts. More so, cleaning the MAF, - it goes MAF + TPS = Table shift. There's allot that relies on sensor signal/reporting than may be realized. This is part of the adaptive strategies program. A reboot defaults the computer in sort of a full reset/relearn mode. Not disconnecting when making changes takes allot longer for the PCM to dial her in = memory full/memory dump. It still will in time, but it's just better to get rid of the old data since it is no longer needed.

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Personally I NEVER use a scanner to erase. I use the onboard program since this is what drives Engine Managment. Always reboot to erase/reset and retest all monitors. That way all your monitors start fresh.

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P1408 isn't that common of a code, -infact I've never delt with it. So I read up on it a bit. After all that, what I got out of it - Yes it's in the circuit, but all data is pointing to an association with, -meaning it's an addition to another fault DTC= Source Problem. Source DTC's would be P1401 and PO401. So since you may have knocked out the source problem (PO401), you may have eliminated that one as well. I guess you'll see.
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BTW- You can pull the PCM fuses after disconnecting the battery, then hit the lights to drain the capacitor for a quicker re-boot. Hell, I just disconnect the battery and take a half hour break myself. - That works for me lol.

Good Luck.

 

Yes forgetting to disconnect it was a pretty decent slip-up. Once again I thank you for the help, and pointing me in the right direction. Hopefully, I wont need to deal with an EGR issue any time soon. And I have already replaced so many other parts I dont think anything will be going out any time soon either. So looks like throwing parts at it to begin with has paid off in a sense.

 

It has and does when their over a decade old. I replaced everything on mine, - I think I got everything lol.

At one time it was running like it was old and tired,- a slug. So I decided to replace the injectors and coils since I found take-offs from a Ford Crown Vic crate motor on ebay. New OEM parts - $60 for the Type 3 injectors/ $65 for the coils.

That made a night and day difference and woke her back up. Not sure if it was coils or injectors that were lacking, - probably both played a roll in it. I think I was @ 185,000 miles when I did that. I'm @ 262,000 now lol.

WAIT! I know what I haven't replaced yet,- those zerkless U-joints! Yep, their still stock. That's what I can do next. The rear did clang a little bit when I went into rewind,-backing up a hill. I had a full size GMC van on a trailer behind me. That was heavy, it was loaded, also had a couple lift gates installed on it. One for cargo, the other for wheel chairs.

 

[QUOTE=jbrew;3818876]Engine compartment looks good from what I can see. - Looks like she's in good shape, -how many miles?[QUOTE/]

I just hit 170,000 this week. I have been trying to fix it up to a near new state. It has been in the family since 98, and I plan on running it till the wheels fall off so to speak, and then slapping some more on there and going a little more.
I do have to say though that I really cant complain knowing that the truck is 11 years old. And just today on my way home from work the CEL started flashing at me. The truck did not dogg out or run like crap, but CEL was just-a-flashing away. I dont know, but looks like a never ending ordeal. I just cant help but think everytime I see that darn light... OH GREAT, here we go again.

 

- Yea, a flashing MalfunctionIndicatorLamp (MIL) or CheckEngineLight (CEL) is a dedicated fault, = "Misfire". The flashing lets you know that your misfire monitor has picked up the cylinder/cylinders with the problem and has stored the DTC's in memory. -Well maybe it has lol, -sometimes it takes awhile to store. It may have to happen again for the PCM to register.

Scan it, chances are you have a code (DTC) to point you in some direction.
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BTW, - I haven't had to work on mine since last winter. Working on her every now and again will probably never end, but in my case anyway, -the gaps of having to do so are a pretty good size lol. It took awhile to get there.

 

Yea I am willing to bet a pretty penny that you a right.. again. I think that this truck likes to run wrong and maybe the CEL blinking tickles its fancy somehow . Im going to scan it first chance I get(tomorrow) hopefully its not some part that went out, because they are all new. As long as it runs fine like it is doing now then ill be okay. Im not so worried about it at the moment like I was when the IAC went out. That was a fun day. Imagine what you would do when you are going 70mph and you take your foot of the gas for just a sec and your truck dies. Awesome.

Well lucky you! I got a work in(never-ending)progress over here. You have no idea how close I have come to putting it out in the field and blowing it up with some black powder just to make me feel better. Oh well, the truck has really grown on me, and I cant see myself driving anything else(not that I can afford anyways ).

 

Hey Jbrew - wanted to send thanks your way once again for pointing me in the right direction on several different issues i've had. got my ride straightened out for now so i've been posting to other peoples questions in my field of knowledge> (paint and body) You're like the DR. Phil of the 5.4. Look me up if you ever make it to the pittsburgh area. I owe you a couple Iron City beers.- stewy

 

We get alot of cars in the shop like the grand marquis and such with the same problem. Their throttle body passages get clogged with carbon buildup and we have to take them off and clean it out.

 

Awww everyone loves Jbrew in this thread. So I scanned it and I got me a big FAT P0300.
Multiple mis-fire or unable to determine mis-fire due to camshaft position sensor failure.
Woo! So because I have a brand new CPS sensor I am thinking maybe a coil pack? My dad agreed that is probably what it is.

ON TOP OF THAT.... I got me a P0174(lean bank 2) and whichever code for insufficient EGR flow. Just my brain trying to think, but MAYBE I have an insufficient flow because of a lack of vacuum? That would also cause me to run lean. It makes sense to me. Do you think that could be the cause of my new and improved codes haha?

Oh and just a random question for Jbrew.. Are you a wolverines fan?

 

Yea, I can't part with the 98. I purchased an 01 5.4L w/ 48,000 miles on it about a year and half ago and didn't like one thing about it, I take that back, I liked the seats lol. - It seamed to have a hard time doing anything, -sort of a dog. The 98's a beast and I really don't have that many mods. The 01 spec's out with more torque and power - I couldn't find it

I sold it last winter. I wasn't crazy about it to begin with. A friend stored at my place, never drove the thing, then he got himself in a bit of trouble and needed some fast cash, -one of those deals.

There it is, well part of it. It did come in handy when I went thru the other truck last year and part of the is this year lol.



Yea, the 98 was twice the truck, - Hell, it even carried more spares -

 

Wow, and I was thinking I was going to need a new diaphragm(sp?) ...Prolly should check that since I'm getting the same codes when I run a diagnostic...haha!

 

replace the DPFE....