Ok let's see if I can explain this good enough. I have a 64 Falcon with a 170. Here is what is going on. The car is fine if I go on short drives. 10 miles or less. When I drove it to work which is about 11 miles one way it is fine in the morning but when I drive home in the afternoon. It starts shuttering at about the same place every day. It is like I try and give it gas and there is no power and when I slow down and pull over it dies. So I checked the fuel filter and it was real dirty so I thought that was the problem. So I cleaned out the fuel pump and put a new filter in and it still does it. I put new plugs, plug wires, coil, condenser, and carb on. yesterday I took it too the parts store and it was fine going there and on the way back it started to sputter and no response to the gas peddle. I made it to a gas station and checked the fuel filter again and it was like new. I put some more gas in it and when I started it again it was running rough and back firing real bad and I had to leave it chocked and give it gas to keep it going. I made it about a mile more and I had to call a buddy to tow it home for me. He thinks it could be jumping time? O ya if you let it set for about 20 min it will run great like nothing happened. After we towed it home I started it back up and it ran like nothing was wrong. It only happens after it warms up. Any help would be great. Some replys on another forum say it could be vapor lock or a clogged up fuel sender in the tank? I dont think it is vapor lock because it has all origanel metal fuel lines. Thanks, Mike
If you have the Holley 1 barrel on it, throw it in the trash. The body warps and if you've set the idle mixture before it is thoroughly warmed up, it'll run fat as hell when it DOES warm up (and stall). Also, if it's bone stock, you have the Load-o-matic system and should check the advance diaphragm on the distributor. There's a few more quirks, but checking these out will keep you amused a while.
Fuel problem, for sure... Did you blow out the lines ,from the fuel pump back to thew tank?? Could be the 'pickup sock" is flubbered up with God-knows what...Like the man said, try another carb..make sure you have a good vented gas cap.. Did you check fuel pump pressure, and volume?? Could be a flat lobe,or worn pushrod..?? Good luck... SpaRko
I just pulled a running 170 and 3 spd on the tree from my 64. We're putting a v-8 in it this weekend. Let me know if you would be interested in parts or the whole thing. Also - Look into joining the Falcon club. There's a great newsletter with tech tips.
I have a few 1 barrel carbs, two need rebuilt but they might be better. I have a working rochester, a zenith and a decent carter. give me a call after 5 or this weekend. You can try 1 or all, I got time. David (nine13) six36-7seven79
Mike, My guess is that you need to clean out the gas tank. I know this car sat a while before you started working on it. I told you you coulda had a V8... r
This sounds like the problem I had with my falcon recently,,,does it have a filter made into the fuel pump,,,if so check it,,HRP
Think about replacing the rubber line from the sending unit to the fuel line under the car. I had a similar problem this year, did a lot of what you did and then found a split in the rubber line, I think it was letting air get in and causing backfiring at speed.
If you use a non load-o-matic carb, you should replace the distributor. Google load-o-matic... there are good options if you know how the system works and what works (or doesn't) when you start modifying.
Wow, lots of advice, at least you can now be sure it's fuel. Open the tank and remove the sending unit. With the tank nearly empty, this is easy to do, replace the sock. I actually cut open the largest fuel filter I could find and used that instead of the sock. My bet is this is your problem. A full tank cleaning or replacement might be in order. They cost about $100 and numerous sizes will drop right in incase you want one larger than stock. Be sure the accelerator pump is working correctly. You might want to rebuild the carb instead of replacing it. I spent about $20 for a rebuild kit as my pump had a tear in it.
Like jalopy43 said it could be a worn off lobe on the cam for the fuel pump. I asked around about that when I got my Falcon because it has a brand new manual fuel pump that came with it but it has a electric fuel pump on the car and a delete plate on the engine. Does not really explain why it would run good cold though......
I had a similar problem with my '63 170. More specific it stumbled under load but would cruise at highway fine. I assumed fuel it just had all the feel of it. I replaced filter, cleaned screen, replaced rubber hoses because they were soft and could be collapsing. In the end it was the dizzy advance sticking. I cleaned it up so that it was free moving again and works great since. KCCOS, your buddy did say "He thinks it could be jumping time?" Check out the dizzy.
Do Falcons have a sealed or vented gas cap? I had a similar problem with a car once (ok, it was a VW Beetle) and I couldn't figure it out until one time it stalled and I took off the gas cap - there was a big Whoosh of air into the tank, and then the car started right up. The vent in the cap was plugged, and the fuel pump couldn't pull against the suction. I put the cap back on loose until I was able to get another one, and the car ran fine after that.
Just for shits and grins, change out your coil too. The heat/cool cycle failure rather than speed of engine makes me wonder about that. I've had several Flatheads that act this way, and it turns out to be the coil. (of course the crab style coil on the flatties is nothing like the yellowtop on the 170), the symptoms seem to be the exact same ones. I'd have sworn it was fuel related, swapped the coil and perfect ever since. It can't hurt to give it a try.
Missed that in your original post, gotta be suckin air or crud somewhere.... good luck and let us know what your find. These irritating little problems cause me to waste more time than the big stuff.
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