New Owner Stuttering and Stalling past 1/2 throttle

[knipdlo]

Well, its not me thats doing the stuttering and stalling, but the truck is..

I just bought a 1969 F100 with a 240/6 and an automatic..I believe it has the original carb The engine was all recently gone through, and it runs like a top- starts easily etc. However there are two problems, the biggest is that if you depress the gas pedal more than 1/2 way it will stutter and lose power and almost die... as soon as you let off its smooth as silk again. It does this under load and not under load, although not under load is nowhere near as bad as when you're trying to get up a hill and you have to ride the gas to keep it from sputtering. The second issue, which might be related or might be the idle adjustment screw being incorrect.. I haven't really gotten into checking the idle adjustment as I've only had the truck for about 3 hours now..

Anyway, if anyone has any ideas, I'd love to hear them!

[1971ford]

We have gotten tons of threads on this basic same problem lately. I'm thinking It's because it's cold now.

Is it cold when these problems occur? If so, the choke needs adjusting. My truck does the same in cold weather beacause im too damn lazy to adjust my choke. I get to a stop sign, give it gas, too much and it dies. Sound similiar? or is it all the time.

[knipdlo]

Seems to be all the time, choke works well from what I can tell.. I drove it about 30 min home from where I bought it, and it did it when it was 12˚F the first time I looked at it, but today was about 58˚F and it did it today too.. I'm questioning the vacuum advance on the distributor?

[cdeal28078]

Might be a fuel delivery problem. Dirty fuel filter? I wouldn't rule out the mechanical advance either.
clint

[Heathcliff68f100]

try it without the vacuum advance connected and the lines plugged, if it sputters, thats your problem,

[knipdlo]

Talked to my mechanic buddy who's workin on it for me (I have NO time right now) he says it needs a carb- the power valve is shot.. so that explains that- I'm having him check and re-set the timing so i dont burn holes in the cylinders...

Now I need opinions on a replacement carb? The carb thats on it isn't original anyway, and apparently has no numbers or markings besides being a "Thompson"? or "Thomas"? I don't remember what he said it was..

I'm all for off the shelf holley's had great luck on a 68 Mustang GT with 289 and a off the shelf holley..

So what do I use?

[Dragon]

Now I need opinions on a replacement carb? The carb thats on it isn't original anyway, and apparently has no numbers or markings besides being a "Thompson"? or "Thomas"? I don't remember what he said it was..

I'm all for off the shelf holley's had great luck on a 68 Mustang GT with 289 and a off the shelf holley..

So what do I use?

Holley 1904s are available for the 240. Rebuilt only.

You have a rebuilt carb the name is TOMCO Chinese rebuilders. Comes from Autozone.

[knipdlo]

Thats probably what it is.. I just bought one from O'Reilly's that is PN: 1-286 and I believe it is a Tomco... are these any good?

[Dragon]

TOMCO Cheap not always rebuilt good. When O' Reilly took over Checker everything went down hill. I had to change 3 PS pumps and the list goes on. When it was Checker their carb rebuilder was Holley and boy those carbs were great.

Napaonline.com HOL 641438 is a Holley replacement for a YF or holley, NAPA uses Holley as their rebuild service. Oh and the 641438 is the same price as the 1-286 here in ABQ

[knipdlo]

I found that on the NAPA site, and I do like the Holley rebuild better than the O'Reilly's China rebuild.. I paid 196.99 at O'Reillys.. So I'll try to get them to match the price at NAPA..

Question though, it says that PN is for a manual tranny... what is the PN for automatic? I don't see a listing on their site for an automatic version... what would be the difference? just a vacuum line right?

[Dragon]

Since the carb is turned sideways the kickdown is on the linkage not the carb. I looked in my 71 manual and that is the way it is in there.

[knipdlo]

kickdown is the only worry?

I know the carb thats on it only has one vacuum line hooked up to the distributor vac advance.. is that normal? The advance has two ports..


Thanks so much for the help!

[Dragon]

It is the wrong carb for that dizzy. Or the wrong dizzy for that carb.

[knipdlo]

I think i noticed that there was a port on the carb that was plugged, do your manuals show anything re: a dizzy with two vac ports? I have more faith that the distributor is right, and the carb is wrong..

[Dragon]

No dual advance on a 69 unless it came from Californication.