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66-96 Ford Broncos - Early & Full Size


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About 1978BroncoCustom

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  1. Good afternoon All, With sadness, and some regret, I sold my 1978 Bronco Custom today to a collector in Missouri. On the upside, I found a new project that I plan to start a refurbish on later this week; an all original/VIN matching 1977 Ford F150 Custom 4x4 with a factory 351M400 coupled to a C6 transmission. The project is pretty rough, but with hard work and limited resources I think it has lots of potential. Thank you so much for all of your guidance and recommendations during my time repairing and improving my '78 Bronco. Good luck in your feature endeavors. JM
  2. LMC Truck has been my go to so far in the way of parts and interior items. I too have been looking for seat covers for the sport bucket seats in my '78 Bronco to reduce wear, but so far have not been able to find anything.
  3. Good morning Al, Sorry for the delay in closing out this thread. Mechanic checked the Bronco over, adjusted carb and the choke. The choke plate had been out of adjustment for quite some time and the fuel air mixture was too rich so all the above was causing the soot on start up. He recommended that either I add a bottle of fuel treat or fuel up with higher octane gas every third tank if I planned to run ethanol mixture in it. I still plan to replace the vacuum lines as a precautionary step as they to are almost forty years old and have hardened. Thanks again for the links as they will be a great resource in the future. Jim
  4. Good morning Al and thanks for the links; both are great and I plan to keep them on my profile page for future reference. The gas treatment must have worked its magic as the Bronco ran fine and accelerated normally on the drive over to the mechanic this morning. The bad fuel theory may have held true as some of the smaller deposits or water that could have been causing a line constriction/fuel starvation during power demand may have dissolved over the three days it sat in the garage. As cold as it has been, and the number of nights it sat outside in freezing temperatures while I was at work, there is a possibility that I may have had some ice deposits in the fuel system. When I dropped the Bronco off I passed word via the receptionist that I had changed the fuel filter and suspected bad gas, but wasn't completely sure. Once the carb, choke and curb idle are reset the mechanic plans to take it out for a road test. When I get it back I plan to replace old vacuum lines and a few other sensors that are associated with the carburetor to see if it improves power demand response. Jim
  5. Hadn 't made it to the mechanic yet to check carb/choke. This past week I filled up the tank on my way home from work. Next evening when I drove in for my shift the truck would not accelerate normally and would seem to "bog down" when I pressed the accelerator to speed up to highway speeds. Suspected bad fuel at first so I put a bottle of gas treatment into the still full tank and changed out the fuel filter; no joy on the post maintenance road test. This afternoon before work I was going through the recommended trouble shooting techniques in the Haynes Manual for lack of normal acceleration/power. I have eliminated everything but timing (slipped timing chain), distributor and coil. The coil was replaced last year about this time, but I picked another up at the parts store on my way in to work. Tomorrow afternoon I will replace the coil, recheck plug wire connections and pull a couple of plugs to check for fouling. If the coil doesn't fix the problem it will be time for a mechanic to trouble shoot/repair the issue. Of the three remaining areas to check (coil, timing, distributor) all could account for the soot due to an inefficient fuel burn in the cylinders. Stumped just a little on the cause of the "bogging down" as it starts right up on cold mornings, idles well and doesn't smoke (fouling) with the exception of a strong fuel smell during idle warm up when the engine is very cold (parked outside in below freezing weather overnight). Please advise if I am missing anything in regard to trouble shooting; recommendations or similar experiences would be appreciated. Jim
  6. 1978BroncoCustom


    Factory Original Paint and Interior with the exception of a black polymat with heat shield insulation. Engine is a Ford 400M paired with a C6 Automatic Transmission with 112,000 miles on it. Number 1098 off the assembly line. 1978 Bronco Custom
  7. Good morning Al and my apologies for the delay in providing an update. Think I may have narrowed down the root cause of soot buildup in the exhaust. As soon as the temperatures got above freezing the soot level decreased. I noticed when the outside ambient temperatures were in the single digits with a negative wind chill the choke plate would stick causing the engine to labor some at a lower rpm with a strong smell of gas. When the ambient temperatures warmed up the choke worked normally indicated by a gradual increase in rpm as the motor warmed and the plate opened up in the carburetor. Plan to take it to a mechanic tomorrow to have the carb and choke checked/adjusted and the curb idle reset. Hopefully that will correct the cold weather soot issue. Here are some photos of my rig for your viewing pleasure. Will update the thread as soon as the mechanic checks it over and makes corrections. Jim
  8. Good morning Al and thanks for the information. The plugs were clean a few weeks back when I pulled one to check for fouling. The carburetor looks like it has been replaced, and after sitting up for so long, it may be time for a rebuild or thorough cleaning. I changed the oil last night in my rig, and will pull the PVC valve and check it this morning; PCV valve was replaced earlier this year so it should still be good. I'm not very good with carburetors, so I will probably take it to a shop to have it cleaned and reset to factory specs. I'll let the forum know how it turns out and what the root cause of the soot was. v/r Jim
  9. Good evening all. My '78 Bronco has the factory 400M engine installed and blows out a small amount of black soot on first startup of the day; can be seen on the concrete of my drive way. Prior to my purchase, the Bronco had set up for quite a few years so there could be quite a bit of particle buildup in the intake, valves, pistons, etc. I don't think it is the exhaust as I had it completely replaced during the partial refurbish. My Dad and I reset the carburetor and idle speed per factory instructions after I replaced the spark plugs, plug wires, coil and ignition module earlier this year; is it possible we have it set too rich? A third and final theory is the 10% by volume enthanol gas mix I have been running in it doesn't burn very well and is leaving some fuel residue in the pipes when I turn the engine off. Would running a higher octane ethanol free fuel fix it? The engine starts well on cold mornings, doesn't smoke or use oil (107,000 original miles when purchased) and idles well once it gets warm. Any recommendations or information would be greatly appreciated. v/r Jim Meek
  10. Thank you for all the info Al. I think the Yakima line of racks will be what I pursue, a little pricey but seem to fit the need and very streamline. Then again, when it comes to drilling holes in the factory original roof, I may just sell the canoe.
  11. Thanks for the info and Yakima link. I will open it up and see what they have.
  12. Good evening All, Looking for recommendations for a good fitting roof rack for a 1978 Bronco. Roof load would be a canoe or Kayak so load bearing would need to be at least 100lbs. Hate the idea of putting holes in the roof to mount the hardware but have not been able to find any other suitable solution. Thanks in advance. Jim
  13. Back up switch wasn't the issue. When I checked the fuse it looked fairly new and no visible burns or discoloration. My Dad checked the fuse block with that fuse installed with a test light and the fuse was bad. It had separated below the metal sleeve and was not visible. New fuse got the lights working as they should.
  14. Thanks Al for the diagrams and information on the C6. I know where the linkage is mounted on the left side of the tranny so I should be able to find it. Jim
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