I went to move my 78 Deville yesterday from the driveway to the garage for the winter, and the last time (this summer) I started it it ran very rough, and would stall almost every time I tried to give it a little gas. Keep in mind it was summer, probably 75 degrees. So yesterday, I decide to move it, and was very concerned that the cold weather (25 degrees) would make it impossible. So, I looked at the carb, and noticed 2 short vacuum lines that had developed fine cracks. I'm sure these lines are original, and in 10 minutes time, I had them both replaced. The car started instantly, and ran better than I remember it running in years. It now idles properly, and when I gave it some gas, no hesitation at all. The $2.00 I spent on vacuum lines was money well spent!
Glad to hear! It's true, as robust as these engines are, they're very sensitive to small adjustments. Some new vacuum hoses and minor adjustments can make a world of difference! Especially with a Quadrajet. It's very important to remember that, too, as I'm sure we've all seen good carbs replaced with something off the shelf that doesn't work half as well as a fully understood & properly adjusted original carb!
It was so cold out that I wanted to just start with the two hoses that controlled the choke. It is truly remarkable what a change it made! In the spring I'll replace the others, since I'm sure that they are cracked as well. I just never imagined what a difference it would make.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Cadillac Owners Forum
4.8M posts
369.7K members
Since 2002
Cadillac Forums is the perfect place to go to talk about your favorite Caddys including the ATS, CTS, SRX, Escalade, LYRIQ, Vistiq, concept and future Cadillac models.