Hi,
I was having a very bad time trying to get my mustang timed and thought I should share what was happening and how i eventually found out about fixing it incase anyone else is stuck and lost on how to fix it.
This is a 1966 C-code 289 2bbl with a C4 "cruise-o-matic" automatic transmission.
Back story:
I purchased my mustang from a shop owners son, the mustang was brought in to the shop for an engine rebuild in 1989, when the engine was finished they called the owner for pickup and he never picked it up. Fast forward to 2015, I found the car online as a lien sale and purchased it for $1,300 with mostly all of the parts there and double checking engine compression and it was good!
Now for my problems with timing.
We originally found TDC (top dead center) by sticking my finger in the #1 cylinder spark plug hole ( passenger side front of engine closest to the alternator) We got the car running for its first time in 26 years and even took it around the back yard after replacing the gas tank and cleaning lines ect.
It wasnt until i wanted to get it actually timed that I ran into my problems, Also the car began to bog off the line from a stop and if I did not monitor where I was on the throttle at that time it would stall out.
Problem: Car would stall when starting from a dead stop unless i increased the throttle RIDICULOUSLY slow.
I tried adjusting air/fuel ration and throttle since thats the most basic and easiest to try, it made it run a little better but my idle in park or neutral was way too high, i figured i should take it to a shop nearby and have them handle the timing and install my remanufactured 2100 carb.
They timed it but told me the throttle shaft (when in the engine bay this is the part you push back to rev the car, connected to the throttle shaft) was leakin vacuum pretty bad, you would wiggle it left to right pretty big, maybe .125" - turns out when most companies manufacturer carbs they skip doing any of the expensive work of adding bushing or metal to the throttle shaft. He told me sometimes its best on a budget to just buy a new chinese carb, so I did. and that one had a great throttle shaft.
Skip to after they installed everything and charged $225
Get home and the car still stalls even worse than it did before!
Do lots of googling to find any answers, found someone posted about the vacuum advance (a round metal part sticking out of the front of your distributor with a small straw like nipple pointing forward) and be a problem.
So i hook a hose up to it with a vacuum pump (or you can just suck on the front nipple coming out) and it held 0 vacuum! it must of rusted through sitting and was not advancing my timing at takeoff!
Go to O'reillys and purchase a new one for $30, then I reset the timing (you can find a walkthrough of this online very easily)
Now I have 18"hg pretty much means the vacuum is at 18 PSI and my RPMs are around 800. Now it dosnt stall but I am very upset i paid $225 pretty much just for them to install a carb with 4 bolts.
I hope this helps, just thought id share to at least help someone!
I was having a very bad time trying to get my mustang timed and thought I should share what was happening and how i eventually found out about fixing it incase anyone else is stuck and lost on how to fix it.
This is a 1966 C-code 289 2bbl with a C4 "cruise-o-matic" automatic transmission.
Back story:
I purchased my mustang from a shop owners son, the mustang was brought in to the shop for an engine rebuild in 1989, when the engine was finished they called the owner for pickup and he never picked it up. Fast forward to 2015, I found the car online as a lien sale and purchased it for $1,300 with mostly all of the parts there and double checking engine compression and it was good!
Now for my problems with timing.
We originally found TDC (top dead center) by sticking my finger in the #1 cylinder spark plug hole ( passenger side front of engine closest to the alternator) We got the car running for its first time in 26 years and even took it around the back yard after replacing the gas tank and cleaning lines ect.
It wasnt until i wanted to get it actually timed that I ran into my problems, Also the car began to bog off the line from a stop and if I did not monitor where I was on the throttle at that time it would stall out.
Problem: Car would stall when starting from a dead stop unless i increased the throttle RIDICULOUSLY slow.
I tried adjusting air/fuel ration and throttle since thats the most basic and easiest to try, it made it run a little better but my idle in park or neutral was way too high, i figured i should take it to a shop nearby and have them handle the timing and install my remanufactured 2100 carb.
They timed it but told me the throttle shaft (when in the engine bay this is the part you push back to rev the car, connected to the throttle shaft) was leakin vacuum pretty bad, you would wiggle it left to right pretty big, maybe .125" - turns out when most companies manufacturer carbs they skip doing any of the expensive work of adding bushing or metal to the throttle shaft. He told me sometimes its best on a budget to just buy a new chinese carb, so I did. and that one had a great throttle shaft.
Skip to after they installed everything and charged $225
Get home and the car still stalls even worse than it did before!
Do lots of googling to find any answers, found someone posted about the vacuum advance (a round metal part sticking out of the front of your distributor with a small straw like nipple pointing forward) and be a problem.
So i hook a hose up to it with a vacuum pump (or you can just suck on the front nipple coming out) and it held 0 vacuum! it must of rusted through sitting and was not advancing my timing at takeoff!
Go to O'reillys and purchase a new one for $30, then I reset the timing (you can find a walkthrough of this online very easily)
Now I have 18"hg pretty much means the vacuum is at 18 PSI and my RPMs are around 800. Now it dosnt stall but I am very upset i paid $225 pretty much just for them to install a carb with 4 bolts.
I hope this helps, just thought id share to at least help someone!