Outlawboss
Member
Hi everyone,
Well it's been forever since I've posted! I'm finally working on the mustang again after a few years away from it and have run into a problem that I can't seem to fix. I'm hoping you can help. Here's the background.
This is a 66 coupe, 289 with warmed up cam, stock heads, tri-y headers, Edelbrock intake and Edelbrock 1405 carb. The car had been sitting for 2 years, only being started 5-6 times during that time period.
To get things rolling again I dropped in a fresh battery and rebuilt the old 1405 carburetor. Something went bad during the carb rebuild and after pulling my hair out I decided to replace it with another 1405.
I got the new one installed and dialed in pretty nicely. The car was driving at least as good as it used to, if not better. SO EXCITED. That lasted for a few trips, but then I noticed it struggling at low rpm after getting off the freeway during my last outing. It would run ok under part throttle to wide open throttle, but when easing on the gas from a stop or going very slowly it would sputter and lurch forward, clearly on the edge of the combustion envelope. I managed to get it home and by the time I did the problem seemed to clear up. The next day I tried taking it out again. It was fine until I took a brief 2-exit course down the freeway. Once again, after getting off the freeway it was struggling to keep an idle. That time I barely got it back.
Today I went out to try again and couldn't even get it to keep an idle. I started with simple things:
Any thoughts/advice would be much appreciated!
Well it's been forever since I've posted! I'm finally working on the mustang again after a few years away from it and have run into a problem that I can't seem to fix. I'm hoping you can help. Here's the background.
This is a 66 coupe, 289 with warmed up cam, stock heads, tri-y headers, Edelbrock intake and Edelbrock 1405 carb. The car had been sitting for 2 years, only being started 5-6 times during that time period.
To get things rolling again I dropped in a fresh battery and rebuilt the old 1405 carburetor. Something went bad during the carb rebuild and after pulling my hair out I decided to replace it with another 1405.
I got the new one installed and dialed in pretty nicely. The car was driving at least as good as it used to, if not better. SO EXCITED. That lasted for a few trips, but then I noticed it struggling at low rpm after getting off the freeway during my last outing. It would run ok under part throttle to wide open throttle, but when easing on the gas from a stop or going very slowly it would sputter and lurch forward, clearly on the edge of the combustion envelope. I managed to get it home and by the time I did the problem seemed to clear up. The next day I tried taking it out again. It was fine until I took a brief 2-exit course down the freeway. Once again, after getting off the freeway it was struggling to keep an idle. That time I barely got it back.
Today I went out to try again and couldn't even get it to keep an idle. I started with simple things:
- Try different step-up springs
- Check float levels
- Check the jets for junk (it did sit for awhile)
- Check idle screws (nothing had changed)
- Making sure the ignition wiring is tightly pugged in
Any thoughts/advice would be much appreciated!