Howdy Y'all,

My little 318 is REALLY struggling on the highway. I get up to about 75 mph, and she doesn't wanna go any further than that no matter how hard I push the gas. There doesn't seem to be a difference between half and full throttle. The car is a 78 Aspen with a 4spd manual tranny, 2 Barrel Carter BBD. Mostly stock, but with Pertronix Ignitor III ignition system.

I rebuilt the carburetor myself (my first time) and I'm wondering if I f*cked up the adjustment on the accelerator pump. Thoughts?

 

RS -

Sounds like it's starving for gas (from any point on the line), but it could be the ignition as well.
Didn't we talk about getting a Mopar ignition system and being done with it???

Then there's weak valve spring causing early valve float.

Just kinda hard to tell without being there.

Archer

 

First thing I would do is put a fuel filter on it then I'd replace the ignition with a mopar electronic ignition that the car had on it.