Hi everyone,

I have a 1986 Bronco2 XLT 2.9L EFI 5 SPD 4x4 with a burnt out egr tube from the dr. side exhaust manifold to the egr valve. We don't have to worry about testing up here for emmissions in Sask. Canada yet. What would happen if a person plugged the hole and disconnect the egr valve? It is very hard to find a egr tube for this so I thought I would ask the experts on here. My concern is bad fuel mileage because the egr feedback sensor that connects to the egr valve would read zero and relay it to the computer. The tube is burnt through about 1" from the manifold on the driver's side. The truck is running ok but the gas mileage seems to have dropped by about 4-6mpg.
Any comments on this would be great.
Thanks

 

My EGR tube was disconnected at the valve end and it didn't affect my mileage much, that I can recall. You could probably get by with plugging the manifold end and disconnecting the valve end and leaving it open or plugging it. Even better would be to get a computer from a newer BII (was it 88 or 89 when they tossed the EGR system altogether?) or Ranger and just remove the EGR altogether -- which would take some time sorting out wiring most likely, but maybe not, as I haven't done this to mine (yet). Another fix would be to find someone that can do fab work with stainless steel tubing and have them make up a new tube, re-using your old threaded ends or new ones of the same size, etc.

 

FWIW

Part number: E6TZ-9D477-B Tube, Exhaust Gas Recirculation

I cannot guarantee that the B suffix is correct, as the microfiche slide has a scratch right on the suffix, but if you decide to replace the tube, one of our Ford dealer sponsors will be able to confirm.

 

Thanks kernel-panic and NumberDummy
I think I will try plugging the hole for now and disconnecting the egr. NumberDummy you are right about the part # and the suffix is -B. the part is about 138.00 Canadian.
Is there any truth to disconnecting your battery to reset the computer? This truck has about 210,000 miles on it and I don't believe the cat has ever been changed. Should I change this because I would bet its partly blocked. I have never changed the fuel filter as my Haynes manual claims it shouldn't have to be serviced. Any other items that you guys think should be serviced besides the obvious regular tune-ups and oil changes?
Your comments are appreciated.

 

I can't remember how long you have to leave it disconnected, but yes, disconnecting the battery does reset it, if I remember right. So does reading codes and fixing problems and re-reading codes... with a scanner / code reader, I believe. I would replace the catalytic converter... however, does Canada actually have emissions testing or any sort of inspection that it would really matter if one was installed or not? (re-read your initial post, so the answer is "not yet"... so, I would get a new cat, preferrably hi-flow like sold on truckperformance.com) I would definitely change the fuel filter(s) -- could be more than one -- I'm going to see if I have two inline filters instead of one, as there are two types listed for in-line. Other than routine maintenance, I would check everything on the truck out, brakes, steering, etc etc etc. If you don't know when the last time any of the fluids were changed, it would be a good idea to work on that too -- differentials, transmission, transfer case, antifreeze, oil, etc etc etc. You'll also want to pay particular attention to any leaks on anything and figure out where they are coming from. Some of the problem areas are: Valve cover gaskets, front and rear main engine seals, transmission / t-case seals. I'm slowly working on doing a lot of this to mine as I get time and energy and have the extra money to do so... although, some things I'm not so worried about as I have modifications planned, i.e. axle swap, etc. Hope this helps.

 

the fuel filters do require maintenance,i replaced mine at least once a year.mine actually has 2 in-line filters 1 near the fuel pump at the back near the tank and 1 under the driverseat in the frame rail. as for disconnecting the battery,it does reset the eec. on the egr tube,you may be able to go to a machine shop and see if they can manufacture a new tube cheaper than buying one from ford or a parts house. worth a try! hope this helps

 

Hi all. Thanks for all your responses. As of today I plugged off the egr tube and plugged off the egr valve. The truck runs better. I will keep you informed on the mpg to see if it worsens. The other maintance options you folks have provided me make very good sense and I will put them into practice ASAP.
thanks again

 

My '87 Bronco II has the same problem.
It is broken at the manifold and makes noise.
The nut looks pretty rusted, I was thinking of warming the manifold and using PB blaster.

 

I fixed mine with a couple pieces of copper tubing. Don't remeber the sizes but i took my rusted off EGR tube with me to Home Depot and found the tubing that I needed to make up the length of the tube and fit in the nut for the manifold. I couldn't find a size that woulod fit the inside ID but I found a 1/4 bolus? that is used to plag a copper line but let any liquid expand into it. I cut off the length I wanted from the expansion bolus and fixed it all together with JB weld. Worked like a champ and only cost about $3.00, versus the $145 Ford wanted. It passed emmsion inspection just finr and has been working perfectly since.

 

HBYHRS87,
I fixed mine just today in a similar way.