I got the code for Insuffucient EGR flow on my 1997 3.0L Ranger. If I clear the code it reappears after about 40 miles.

I have replaced EGR valve, DFPE sensor and EGR vacuum solenoid. and code still appears.

I had access to newer parts from a wreck so it didn't cost me much to throw parts at the problem, normally I would not have done that.

I apply vacuum to EGR valve at idle and there is no change, no sputter or stall.

I am assuming that there is a carbon build up somewhere and would like to know the best way to clean it.

Or if anyone has had a similiar problem.

Thanks,
Brian

 

I've seen hoses or tubes running to & from egr's clogged shut like arteries.
To remedy this I've removed them & used (depending on the tube or hose) drilling, pipe cleaners or bent the hose & rolled it until powdered carbon poured out & I could see through it again.. eventually I just changed out the hose since it is cheap & could then be ruled out as a vacuum leak in the process..

 

Assuming that the vacuum lines to the EGR valve are working properly: I too have experienced the EGR port carbon up. Best way to clean it, IMO, is to remove the valve and chuck up a piano or guitar string in your drill, place the string in the hole and "let 'er rip". Best to have a buddy hold the shop vac hose near the port to suck up as much of the residue as is possible.

Also check the tube from the exhaust to insure that it is clear.

Not uncommon.

Hope this helps

Russ

 

I'm in the same situation as you bwoolston16. I've replaced everything (including the 2 hoses to the position sensor) but the solenoid. I've done everything but clean the metal exhaust tube between the EGR and the manifold. I've subscibed to see if you keep us posted, I'll do the same.

 

took off EGR valve and sprayed some throttle body cleaner in the small port.

The I took a wire coat hanger and tried to loosen up all the deposits.

I vaccumed out some pretty signifigant pieces of carbon.

There was still no "stumble" when I replaced the EGR valve and applied direct vacuum to it.

So I took the truck on the turn pike and drove it pretty hard after it wrmed up.

about 10 miles later the light went off and hasn't come on since.

The light had been on for almost 2 months so I am pretty sure the cleaning was the trick.

Thanks to all who replied.

Brian

 

Cool. Happy to hear problem solved.

Russ

 

It is pretty common to have those intake to EGR ports clog up, physically blocking the flow.

 

Glad to hear you fixed your problem.

I disassembled mine again this weekend. Cleaned the intake port and the exhaust line to the EGR valve. No luck, it still gives the insufficient flow code and stumbles. The only thing I have not replaced is the EGR vacuum solenoid. The part number (i think) that I could visually identify is FOTE-A1A-9J459. Is this correct and can anyone find a replacement part for it? I tried the internet with no luck.

Any ideas??

 

Check out motorcraft or rockauto.com, they'll show the part number.

 

I checked those places but it can be confusing. The rockauto.com had the EGR regulator solenoid listed but had a picture of the EGR position sensor. To help out, I found a picture of what it is I think I may need. The Item is not from a Ranger, but it is almost identical in shape and size.

 

What engine do you have?

 

It's a late '94 2.3L VIN A.

I'm not sure if this will help, but the Emissions calibration lable is as follows:
4-49S-R00
F4AE-6E061-LAB

 

You have it identified correctly, I could find anything more either, maybe a call to rockauto or your local store might find a source.

 

I went to the dealer at lunch today and got the actual part# for my truck. I also found it on-line at Fordparts.com

FOTZ9J459A $25.89
Emission system - Egr system - Vacuum regulator
VACUUM REGULATOR, Ranger 1993 - 1994

The dealer wanted $40.58

 

Glad to hear you tracked it down, good luck with the truck.