new engine running rich. Help!!
Thread Starter
Instructor
Joined: Feb 2005
Posts: 101
Likes: 0
new engine running rich. Help!!
Just dropped a new small block in my 69 vert. New rebuilt quadrajet from Summitt. Started it up and smells of gas so bad. Tried turning in the screws to lean it out and with a screw all the way in it still didn't stall. Put both screws 1.5 turns out and the car now runs like cra*. Next, tried another quadrajet I have and again, the smell of gas. Running so rich.Someone told me maybe a vacuum leak??
Thanks
Thanks
Race Director
Joined: Oct 2000
Posts: 15,036
Likes: 79
From: central FL, near the beach.
send 1 to lars for a rebuild.
1st make sure it has good spark (points r obsolete since '75)
and check for normal fuel pressure.
1st make sure it has good spark (points r obsolete since '75)
and check for normal fuel pressure.
Last edited by Matt Gruber; Aug 9, 2008 at 06:43 AM.
Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
Just dropped a new small block in my 69 vert. New rebuilt quadrajet from Summitt. Started it up and smells of gas so bad. Tried turning in the screws to lean it out and with a screw all the way in it still didn't stall. Put both screws 1.5 turns out and the car now runs like cra*. Next, tried another quadrajet I have and again, the smell of gas. Running so rich.Someone told me maybe a vacuum leak??
Thanks
Thanks
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Matt and SXR6 are right on - first thing to check is fuel pressure - did your new engine come with a new fuel pump, and if so what pressure is it putting out?
If it's a "race" pump, it's overwhelming your needle and overfilling the fuel bowls.
I'd look to the pump pressure and fuel levels before looking at anything else.
If it's a "race" pump, it's overwhelming your needle and overfilling the fuel bowls.
I'd look to the pump pressure and fuel levels before looking at anything else.
