Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
'86 CCC Quadrajet High Dwell
Don_Bianco:
Hey all!
I've been trying to fix this problem for a long time now, here goes!
I've got a rebuilt Qjet on my '86 Cadillac Fleetwood Brougham. It has an olds 307 in it by the way.
I'm having an issue where at highway speeds i'll feel a slight surge in speed, sometimes worse than others, and if i start the car when it's warm enough to not use the choke, the car feels like it's about to die.
Now I hooked up my dwell meter to take a look at what the MCS is doing and I'm stumped! It's completely stuck at about 45degrees and no matter any adjustment I can't make it move. When I give it some gas however it'll fly over to about 5 degrees and stay there no matter how much gas i give it(The car is all warmed up too). Now! When I start it when its already warm the dwell reads about 60 degrees and it feels like its about to die out, very shakey too.
Does anyone have any ideas as to what my problem is? Could my o2 sensor be completely caked in carbon and not give me a proper reading?
The car has right around 155k kms on it (I think thats about 95,000 miles)
Any help at all would be greatly appreciated!!
Cliff Ruggles:
When you say the carburetor is "rebuilt", is it the original unit, or purchased from a parts store?.....Cliff
Don_Bianco:
Sadly it's a completely "new" unit, my original one had damage to the casting itself so it needed to be replaced.
Cliff Ruggles:
Didn't know they made "new" ones, only commercially "remanufactured"......Cliff
Don_Bianco:
--- Quote from: Cliff Ruggles on December 11, 2016, 01:58:34 AM ---Didn't know they made "new" ones, only commercially "remanufactured"......Cliff
--- End quote ---
That's why I put new in quotes, its new to the car, its a rebuild by guaranteed carburetors.
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