Not sure why my mustang won't start it starts for 10 seconds and starts to die if I don't hold the gas down could the reason be cuz the fuel tank is rusty and the gas is mixed with rust? I have a filter before the fuel pump which people say not to do but that the only way I can stop the rust from clogging the inline filter on the carb and clogging the jets.

 

If it starts but won't idle, I'd start by adjusting your idle fuel mixture. There should be a couple screws on the carb that determine how much gas it gets at idle.

And if you have that big of a rust issue, I'd definitely look into a new tank, and possibly a new line while you're at it.

 

It struggles to start and when I get it to start it won't idle unless I hold the gas down. The filter I put get filled with Red gas from the rust I was thinking its a big rust problem

 

Who said that fuel filter was a bad idea? Iv had one on my car senses i put it on and haven't had a problem. I used the clear ones and if you could see all the crap its kept from getting in the carb And engine anyways when was the last time that filter was changed? And like above have you adjusted it at all? What about the timing? Or even a tune up?

 

I would rather change the tank first instead of messing with the carb which I don't have thatch experience with. And I was told when I I got the carburetor rebuilt it was calibrated right.

 

People from a local mustang shop said it can cause air bubbles to be in the gas. And it has brand new filter the clear one and got filled with rust in about a week everytime got a tune up and timed recently

 

Same thing happened with my filter but it seems to have worked it self out. When was your carb rebuilt? And has the weather change a lot?

 

Rebuilt like a month ago and the weather had changed just cuz of a storm passed by but the car was covered up with a tarp

 

But like average temp? That makes a pretty big difference

 

It would probable be like in the high 50s low 60s