Join Date: Oct 2004
Location: Fayetteville, North Carolina
My Ride: 87 GLH-T
Engine: 2.2 carb for now...2.5 with 20+psi coming soon!
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Weber Carb jet size needed
1987 Omni, 2.2 manual. Previous owner swapped the Holley for a new Weber. I think the jets are wrong. I am getting only 21 mpg, the car is dieseling during shut off, and during load (like 5th gear driving up hill, or acceleration in 3rd is when I see it most but it is in all gears) the car studders. Not bad, just a quick spit. During idle the car is smooth. During most driving the car is smooth. But I have never went on a single trip where the car did not spit and spudder during driving. And even when is does spit and spudder it is so subtle that the car doesn't even really notice. It still accelerates but still...I can feel it. I have replaced the coil, plugs, cap, rotor, wires, HEP, alternator. I timed and then retimed the car. I am not 100% certain the issue is in the carb, but I don't know where else it could be. My main question is what size jets are stock for these cars? I wanna verify the jet size is right and see if the issue goes away, gets worse/better. Besides, my MPG's are terrible, I hope it because I am running to rich. The previous owner removed the power loss light so I am not sure if I have any codes.