I got my CD on ebay for about $20.

99 F250SD EC 5.4L 3.73 285 BFG/ATs...
99 Expy EB 5.4L

 

Tom, Im having the same problem with my expi. I stop at a light and the idle drops, and the truck starts shaking, and it will go away within about 30 sec. or if I give it a little gas. Im going to check the valve in the morning see if it's the prob!

 

Just to clarify... it's not the valve that usually goes bad... it's the rubber boot on the back of the intake that connects the hose going from the pcv valve to the intake.

I couldn't see it on our truck... just had to feel around till I got it.

 

I love this board! - checked it out this mnorning ang sure enough the pvc had completely come out of the valve cover and popped it right in. Checked the lines and everything was ok and the truck ran awsome I big THANKYOU to everyone in this subject!!!!

 

Sorry all, I've been to busy at work to check the forum. I got my CD from Ebay. I cant tell you the price, you would hate me. But it was under $20.00 Try this Email to go direct to the souce rvanalst@gigfoot.com ask for version 21.0 1998 Factory Service Shop Manuals. Good Luck

 

>Just to clarify... it's not the valve that usually goes
>bad... it's the rubber boot on the back of the intake that
>connects the hose going from the pcv valve to the intake.
>
>I couldn't see it on our truck... just had to feel around
>till I got it.

Thanks for the great info. I, too, had the same problem with the rough idle. I was just about to call my dealer to have them check the codes for the "Check Engine" light, but I did an internet search first. I found this forum and the symptoms were exactly the same as what I had, so I picked up the part (F85Z-6C324-AA) at my local Ford dealer. One of the service techs was kind enough to show me exactly where the boot was at the very back of the engine. I let the engine cool overnight and removed the worn out boot (it had an eraser-size hole in the corner) and installed the new rubber boot within 15 minutes. My Expy runs great now. I appreciate everyone's input on the forum, especially "tapenick."

 

thank god for this web site, i was going to take my 1998 exp to the dealer tomorrow. ok heres MY problem, check eng light went on, and the engine started to ping. I did the autozone thing and there code came up p0171 & 174 eng running lean.

Q= did your engine ping also or should i check that elbow @ the pcv to the intake & replace the plugs and wires?



thanks for the help

henson 1998 exp
k&n air filter

 

>thank god for this web site, i was going to take my 1998 exp
>to the dealer tomorrow. ok heres MY problem, check eng
>light went on, and the engine started to ping. I did the
>autozone thing and there code came up p0171 & 174 eng
>running lean.
>
>Q= did your engine ping also or should i check that elbow @
>the pcv to the intake & replace the plugs and wires?
>
>

I did have a little pinging right when I would hammer down on it... not much though. Not all the way through the RPM range... just initially.

 

ok i figured it out (or ford did), i checked all the vacum lines and they were all good. so i took it to the ford dealer and they did a diagnostic and found out it was the mass air flow sensor ($165.00 part + $71.00 diagnostic) . it took about 5 min to install, an idiot could do it. so i drove it and it runs great no ping & no check engine light.

thans for all your help, i hope my findings will help someone else out.

j. henson
1998 expedition 4x2
4.6L W/ 3.73 rear end
k&n air filter (a must)
e-mail hensonjames2002(No Email Addresses In Posts!)

 

Where is the mass air flow sensor? Any way to check if it's good or bad?

I've got the same codes, but it sure seems like the boot everyone is talking about is OK on my vehicle.

 

[updated:LAST EDITED ON 10-Oct-02 AT 04:12 PM (EST)]answer= do you know where your air filter is? the mass air flow sensor is located in your air intake opposite of where the air filter is inserted. so in other words if you are opening the latch to take out the air filter, the mass air flow sensor is in the tube oppisite the air filter. it looks like an alluminum tube with a small 1/2" hole on the left side as your looking at it.
to answer your other question the only way i found out was from a diagnostic through ford.
i hope i helped, if not e-mail me and give me your # and i will call you back.




jim henson
1998 expedition 4x2
4.6L
k&n air filter

 

Thanks Jim, that helps. I'll take a look tonight.

Was the $165 for the part only? Is it a Ford part or can I buy an after market?

 

the $165.00 part was from ford, i looked for after market but no one carried it or it would take 8 weeks to get in . but after looking on e-bay today i found a k&n intake filter system w/ the mass air flow sensor for only $75.00. and that system is the hot ticket if you want increased hp and torque.
so i would suggest checking e-bay prices before slapping down $165 bucks.


let me know what happens, talk to you later,

jim henson

 

Thanks Jim, I'll check out E-bay. Sounds like it might be worth changing the MFA sensor, even if it doesn't resolve my check engine light, given I could gain extra HP. Worth a try anyway. I'll keep you posted.

Thanks