I've got a little bit of work done on my 71 mustang fastback.

I’ve changed the distributor cap, rotor, spark plugs, plug wires, thermostat, flushed the radiator, and changed all of the fluids.

Doesn’t sound like much but when you consider we have a 3 month old baby boy in the house, it was hard to get that little bit of work done!

I’m planning on getting a new coil this week and that should about do it in the engine compartment, for now.

However this weekend I took my 15 year old son out for a drive. The car still starts beautifully, and idles nice.

While we were out driving it, when I really hit the gas petal hard, the car hesitated, spitted and sputtered. I would let off the gas and it went back to running fine. I tried slowly depressing the gas petal and it would rev up and do fine. But every time I hit the gas petal hard it would spit and sputter. I tried spraying out the carburetor with carburetor cleaner, but it didn’t seem to help.

I’m guessing either the carburetor needs to be rebuilt or some how the timing is off?

 

well i dunno what engine you have but that would be a lean condition i would look at the nozzles for the accelerator pump "shooters" as holley calls them and make sure that they are clean and look at your accelerator pump makins sure its in proper order and if you can richen the accel pump then try that first rather than buying parts more than likely its an adjustment but let us know what engine and carb you got

 

It's pointing towards an advance issue or timming. Sounds like you're getting plenty of fuel, just not enough ( or incorrect ) timming to burn it.

Try resetting the timing and go from there.

 

It's not getting enough gas soon enough. Time for a carb overhaul.

 

thats what i just said but i didn't think bout timing chain stretch either cause i dunno how many miles he got on motor so it could be a bit of timing

 

Thanks for the replys guys, sounds like I need to learn about rebuilding a Holly carb.

Brandontyler65, It's a 429 and I'm not sure about how many miles are on the engine.

 

its not that hard but when i do a rebuild i take pics so i know where stuff goes and second get some carb dip to soak it overnight in i used to just spray with cab cleaner then i tried the dip and will never go back it does an amazing job BTW 429 is fun engine all you gotta do is get a 460 crank and it will be that much more fun

 

Thanks, I really appreciate the help.

Yeah, I've been thinking about a 460 crank when I eventually have the money for a rebuild......

Let's see, my son is 3 months old……

That means 17 years 9 months till 18 and out of high school…….

Then 4 years of college................

Maybe by the time I'm 65 I'll be able to afford it.......

 

I've been thinking about doing away with the points, and maybe going with a Pertronix IGNITOR II, but would I be better off in the long run to switch to a good HEI distribuitor?

 

better ignition is a great idea. Duraspark works well too, much better than points.

I tend to agree on the lean condition, the pump cam and a different shooter should fix it. Which way to go, I cant tell you unless I am workin on it. Its a trial and error thing. I would also throw more advance at it, see if it will still start hot with 14 initial.