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Old 08-15-2019, 11:30 AM   #1 (permalink)
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Car runs like poop.

63 Galaxie 289. Couple issues going on.

Started out losing power at highway speed. Felt like it was starving for fuel; say I started pulling a hill at 75 or so, feed it some throttle, and it would fall on it's face for a minute or so. Let out of the throttle and it would come back into it until you tried again. Lower speeds seemed fine.

[Red herring alert] I knew the carb was wasn't great, so I threw on an Edelbrok 4 bbl and intake I had. I figured it would either fix it or add another variable into the equation, so why not? Didn't change much.[/red herring]

Tried a new coil and it soon got worse. Starts fine, but as soon as you get up to about thirty, it totally shits out. Doesn't stall, but can't get any revs out of it. Just enough to turn around a limp home. Shut it off, it restarts fine.

Threw on a Facet electric fuel pump, no change. At this point life called and I haven't been able to work on it for in a bit.

Fuel flow through filter looks good. Plugs are recent. Cap/rotor/points/condenser look new, and I assume they are as there had been lots of money put into this car before I bought it mid-resto. I've put a couple thousand miles on it and it ran great until it didn't.

One other thing, the generator has been acting up. Wouldn't excite and begin to charge until higher and higher rpms. Could that effect spark under load?
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Old 08-15-2019, 11:32 AM   #2 (permalink)
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Slick 50 and Seafoam my man! You'll be doing burnouts and brodies in no time!
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Old 08-15-2019, 11:35 AM   #3 (permalink)
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I had an old Courier that would do similar. My old Celica had this issue at one time as well. Turns out the Courier had a wrapper from a pack of cigs in the fuel tank. It would randomly starve itself when going down the road. The Celica had a lot of garbage in the fuel filter on the pickup tube.
Worth a look at least.
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Old 08-15-2019, 11:36 AM   #4 (permalink)
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Check the advance spring in the Distributor. I would be willing to bet it broke/came off.

Baring that, condenser could have shit the bed, also could be the rotor has issues and as RPM goes up, said issue (crack/lack of contact) starts to show up.
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Old 08-15-2019, 11:39 AM   #5 (permalink)
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Watch it run at night in the dark and look for sparks.

Check the vacuum.

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Old 08-15-2019, 11:47 AM   #6 (permalink)
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Just went through a bunch of this with the M715. I'd suspect ignition first.

Skip White drop in HEI dizzy for a SBF is like $60. I know it's blasphemy but I like shit that runs
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Old 08-15-2019, 11:48 AM   #7 (permalink)
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Pull out fuel tank sender I’m sure the screen on it is all full of shit.
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Old 08-15-2019, 11:49 AM   #8 (permalink)
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Slick 50 and Seafoam my man! You'll be doing burnouts and brodies in no time!
Slick 50 must be the shit 'cuz I Seafoamed it as soon as I swapped the carb.

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I had an old Courier that would do similar. My old Celica had this issue at one time as well. Turns out the Courier had a wrapper from a pack of cigs in the fuel tank. It would randomly starve itself when going down the road. The Celica had a lot of garbage in the fuel filter on the pickup tube.
Worth a look at least.
Yeah, that worries me a bit. I did have to clean the tank out when I put the car together, but again it looks good at the filter by the carb.

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Check the advance spring in the Distributor. I would be willing to bet it broke/came off.

Baring that, condenser could have shit the bed, also could be the rotor has issues and as RPM goes up, said issue (crack/lack of contact) starts to show up.
Good stuff, thanks. I'll dig into that next.

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Watch it run at night in the dark and look for sparks.

Check the vacuum.

Attachment 2941456
Good call as well.
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Old 08-15-2019, 11:50 AM   #9 (permalink)
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Could also be some carbon built up on the valves. Pouring a little marvels mystery oil down the carb should clean those up. I've even seen people use water...a little at a time.

I'd look to convert it to electronic ign. I went with PerTronix...and a regular tune up...plugs, wires, cap and so forth.

And good lord, ditch the gen and go with a one wire alt.
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Old 08-15-2019, 11:51 AM   #10 (permalink)
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Just went through a bunch of this with the M715. I'd suspect ignition first.

Skip White drop in HEI dizzy for a SBF is like $60. I know it's blasphemy but I like shit that runs
You had to go there. I'm trying to keep it old school here, mang.

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Pull out fuel tank sender I’m sure the screen on it is all full of shit.
Definitely possible.
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Old 08-15-2019, 11:56 AM   #11 (permalink)
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Could also be some carbon built up on the valves. Pouring a little marvels mystery oil down the carb should clean those up. I've even seen people use water...a little at a time.

I'd look to convert it to electronic ign. I went with PerTronix...and a regular tune up...plugs, wires, cap and so forth.

And good lord, ditch the gen and go with a one wire alt.
But how can I be a proper luddite that way?
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Old 08-15-2019, 11:58 AM   #12 (permalink)
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I'm voting for an ignition advance problem, either the mechanical isn't working right or the vacuum is hanging up. Both easy to fix.
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Old 08-15-2019, 11:59 AM   #13 (permalink)
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But how can I be a proper luddite that way?
Do you want to be a luddite or do you want to actual be able to drive your shit?
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Old 08-15-2019, 12:01 PM   #14 (permalink)
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Rubber fuel lines? Try running it from a jug? Fuel at the filter doesn't mean flow.
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Old 08-15-2019, 12:13 PM   #15 (permalink)
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I'm voting for an ignition advance problem, either the mechanical isn't working right or the vacuum is hanging up. Both easy to fix.
Like I said above... that was right where my mind went when I saw the symptoms. No advance under rev.
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Old 08-15-2019, 12:16 PM   #16 (permalink)
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Timing chain going bad?
We had an old 390 that lost all power and barely ran
Had the original chain.
Replaced everything and ran like a top
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Old 08-15-2019, 05:03 PM   #17 (permalink)
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Check the advance spring in the Distributor. I would be willing to bet it broke/came off.

Baring that, condenser could have shit the bed, also could be the rotor has issues and as RPM goes up, said issue (crack/lack of contact) starts to show up.
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I'm voting for an ignition advance problem, either the mechanical isn't working right or the vacuum is hanging up. Both easy to fix.
^^These. Vacuum advance hose rotted out? Set the base timing higher (within reason) and see if it makes the issue better to test.

OTOH, a few degrees of advance shouldn't make it feel like you are describing. Is the throttle cable/linkage fubar'd?? Is the throttle actually opening and closing smoothly with pedal travel?
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Old 08-15-2019, 05:05 PM   #18 (permalink)
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Old rule of thumb: high speed problem = fuel and low speed problem = ignition.
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Old 08-15-2019, 05:21 PM   #19 (permalink)
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You've not said it, so have you even checked the timing?

also, if you take the fuel line off and give it a couple turns, will it shoot gas across the engine compartment? No? Fuel pump

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Old 08-15-2019, 05:40 PM   #20 (permalink)
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LS swap with Delmo's speed adapters and Intake.https://www.delmospeed.com/product/f...cover-adapter/
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Old 08-15-2019, 08:24 PM   #21 (permalink)
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Did it come with a 4 barrel? If not pull that shit off and replace with a simple 2150 carb. Dumping more fuel into it without a cam change wont do anything but give you worse performance. Next order a Pertronix Ignitor and shit can those points and condenser (I had a 390 that would eat points, added this and no more problems and better fuel mileage). Next have you done anything to the heads? If not pull them and have hardened valve guides and seat installed (plus a good valve job done) then run a little hotter plug (burns that fuel your dumping into it).
I run a 347 Stroker in my Ranger (302 based) I make around 425hp with a old Qudrapuke (that is tuned for my app) I run '68 heads that are built around my Lunati VooDoo cam (351 profile) The block is a "69 and I use a Weiand intake and Hedman shortie headers. Its all built around the cam, and it works well. DO NOT over induct it. I have a very bad dislike for the Edelbrock carbs as they offered a "Off Road" carb, but had a common fuel trough that would flood one side out while starving the other on off camber situations (their solution was to put a piece of fuel line in the trough. But wait isnt it a Off Road carb?)

First thing I would do is try the Pertronix (they used to be around 100 bucks, but Im sure they are more now, but they do work)
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Old 08-15-2019, 09:17 PM   #22 (permalink)
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Quote:
Originally Posted by Thepanzerfuhrer View Post
Pull out fuel tank sender I’m sure the screen on it is all full of shit.
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Originally Posted by Subybaja View Post
Rubber fuel lines? Try running it from a jug? Fuel at the filter doesn't mean flow.
These were my 2 thoughts. had the same problem just recently on an old 454 chevy... finally found a cracked rubber hose on the suction side, it would suck air while running and would fall on its face after about 5 minutes on the highway and then limp home at 20mph. Also I'm not a fan of aftermarket electric pumps, rather have the original mechanical style on an old car.
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Old 08-15-2019, 11:18 PM   #23 (permalink)
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Take the fuel cap off, and drive it.

I had a fuel cap (vented) that failed. Would idle and low speed ok, but wouldn't run hard. Fuel pump couldn't overcome the vacuum at speed.
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Old 08-16-2019, 03:55 AM   #24 (permalink)
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250 shot of nitrous and a 3/4 cam brah




check ignition and fuel pickup, if that points dizzy needs parts, swap petronix or find a smallblock duraspark setup and slap in there
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Old 08-16-2019, 05:41 AM   #25 (permalink)
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irst thing I would do is try the Pertronix (they used to be around 100 bucks, but Im sure they are more now, but they do work)

That's still pretty accurate. I run Pertronix on by boat with a 351 and some sort of MSD coil, it works great. I do keep a spare Pertronix kit in the glovebox after having one crap out and leave me stranded, but that was years ago and seems like a one time thing.
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