I am throwing a EGR Insufficient Flow code on my 2001 4.6L F-150.

Is there any way that a bad EGR Valve (already checked the DPRS(?) for proper voltage and it was fine) cause hard shifting and lack of shifting when "flooring it". Its not over-RPM'ing and then shifting unless its from a stop, and if your going highway speeds and "floor it" there is just nothing there. It will gradually get up to speed but it doesn't jump up in RPM or anything.

It almost makes me think a bad TPS sensor, but DAMN I've changed the thing out twice in the last 2 years!.

Can anyone help me?

Chris

 

Just because the DPFE is testing for proper voltage doesn't mean it's good. There's also vacuum lines involved in the system, as are throttle body ports. You could also have a clogged cat.

 

Right! Here's a little diagram of the most common causes. Their circled

 

hey guys,, thanks!

UGH.. dont tell me clogged catalytic converter will do the same thing...cause that could be the deal. I had a misfire in #1 cylinder for the longest time.. and that may have burnt out the cat...

I dont have the alluminum DPFE sensor mounted by the EGR valve anymore, I think i have the plastic black one that sits right on top of the two tubes..

I planned on pulling the intake off and checking it for clogged ports this weekend...

FYI, the truck is a 01 and has 145,000 on it...

Chris

 

where did you get the dpfe? its recommended that you use motorcraft dpfe sensors. most others dont last long. and you also need to make sure that you get the one to replace the aluminum one. the aluminum and plastic dpfe sensors were different.

 

I believe the aluminum replacement made by Tomco is a good one. A muffler shop can test for clogged cats with an infrared sensor.

 

See that arrow (very top) in the diagram ? It points to the flow line which operates the poppet valve. That vac line is green in color. Make sure it didn't fall off or crack and break.

Your shifting problem is caused by the MAF,- Its dirty, so clean it lol.

When the TPS is going south, that always generates a CEL. It's the MAF sensor. {AF+MAF+TPS=Shift points.}

 

Thanks guys! I took the EGR Valve off last night and cleaned it out with WD-40 and worked the valve up and down a couple of times to remove any carbon build up.

I did take a few pictures,, especially of the DPFE. I have the bracket for the alluminum type, but the truck has the black plastic one that sits on the tubes as pictured. I remember replacing that a few years ago, and AutoZone doesn't give me any other option for my truck/year/model other than the black plastic one.

I am going to clean out the MAF tonight. Just WD-40 right? lightly spray? I know its a pretty fragile thin peice of wire. Will a dirty MAF throw a insufficient EGR Flow code?

Thanks again guys!

 

Don't ever do that, - plan on buying a new one SOON. That's hell on the diaphragm. Also, -If you forced the mechanical's in the valve itself, the diaphragms most likley spent .. now. You have to test the valve w/suction.

If you would have asked or searched, you would know that this is a dealership item only. But Tomco carries the Motorcraft Aluminum. Their not interchangeable, you have to get the one your vehicle is programmed for. A simple search would answer all your questions.

Nope. Well, why not, your on a roll.

For what ? Who told you to do these things this way? It's all wrong. Your just screwing stuff up. Why? I would be asking how to fix, you need help.

BTW - DON'T use WD40 on anything but the IAC.

Idunno about you, but I don't see ANY pictures. What are you talking about? You have to post a pic.
___________________

You need to start over, let me know when/if your ready.

 

ok.. ok... lets take this one quote at a time..

1. I read the process of removing the EGR Valve and cleaning it out with WD40 and gently working any carbon build up by stroking the valve from a searched post on here by another senior member. Gently working the EGR valve to remove any gunk that may be keeping the valve opened/closed shouldn't ruin a valve as long as you dont puncture the diaphram or work the spring assembly out of calibration.

Its a 60.00 part, so if it was not working before and WD40 is hard on the rubbers in the diagphram, it had to be replaced regardless of my attempt to fix it anyway.

2. I bought the truck 3 1/2 years ago and I replaced the DPFE with the one that was on it (the small black plastic one). In that 3 1/2 years I have never had a "EGR INSUFFICIENT FLOW" error come up. The DPFE that is on there has been on there for the last 2 1/2+ years.
I only know that there is mounting studs on the bracket for a alluminum DPFE but can't/don't don't know if that is the OEM part for my truck. The short tubes from the Exhaust line that run into the bottom of the DPFE look like it was made that way, either way it was done way before I bought the truck. So naturally I replaced it with the same part.

3. I guess the statement here is to not use WD40. Brake Cleaner?
The Haynes Manual also says that a INSUFFICIENT EGR FLOW could also be several other sensors, DPFE, EGR REG, TSS, CPS, and TPS. Some of these make me think that could be the shifting problem since they started at the same time.
If the MAF was dirty/malfunctioning, wouldn't that also throw a seperate code? (rhetorical question), but I would feel better about cleaning it anyway since it couldn't hurt and I trust what your saying JBREW. (You probably don't know it, but you, your posts, have been an incredible help in the past.)

4. Just being polite. Didn't post the pictures, because they are of just stuff you guys have seen a thousand times. You all know what a DPFE sensor looks like, and I dont have a picture host.

I do appreciate any input..

Chris

 

Go for it - You know what your doing, right. - You got a Haynes manual, your all set.

If you don't mind, post the senior members user name who told you to clean it this way. I gave you a chance above, apparently that had no effect..

Thanks

 

Can someone tell me how to tell if the alluminum or the plastic DPFE is what is suppose to be on this truck?

It's a 2001 F-150 4.6L XLT.

Thanks.

Here is a picture of the current DPFE and also the mounting bracket that looks like it once had a alluminum one on it.
Thanks again.

 

You gave me a chance?? Chance for what? WTF????

 

I'll bet the CEL is from the DPFE now that I have had time to step back from it and think about it.

The DPFE is a gas sensor that goes bad because its probably not good at handling heat/pressures outside of its operating range. When I had the misfire in #1 cylinder I was probably building up a lot of heat from gasses in the Cats.

I will watch the EGR valve due to my "stupidness", but I want to replace the DPFE with the original one (alluminum or plastic) to the truck.

I went onto TOMCO website, and the one they have for my truck is a black plastic one. Granted it looks a little different and looks like it bolts to the mounting bracket by the EVR. I would have to run some hoses from the stubs on the exhaust line from the current DPFE.

Question: On the TOMCO site, it has the option for a 4.6L (6) engine, and a 4.6L (W) engine. Whats the diff?, and how do I know which one I have. I wonder if the parts the same, or calibrated differently.

 

Right here ^^^

If you want help , the least you could do is read the replies