Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
So Much For My Expensive Custom Carburetor :(
jberenyi:
Thanks for the reply Cliff. Forgive my rant in the beginning. It was a bad week at work and this issue just put me over the top. Hope you understand. Anyhow I opened up the carb and checked things out. It looked like the needle was stuck from possibly bad handling with UPS. I basically put it all back together with the proper torque sequence and its okay now. I did have to change the ball stud position from upper to lower. All the Corvettes used the lower hole. This carb had the upper hole because the ID number on casting says it was for a truck application. Not my first choice by any means. Because you went with this carb I lost the fuel canister port and EGR port. Not concerned about EGR but the fuel canister...yes. Hose is just hanging now and not sure what to do with it. Let me know your thoughts on placement.
Cliff Ruggles:
I usually don't get flamed too much in Open Forum, and for sure we do our very best to resolve an issues with any work that we have done. Since I test everything before it leaves here, it's actualy quite rare to see any problems, so it's not something we have to deal with very often. Anyhow, the goals here are to get a good end result, and we go to great lengths to make sure that happens.
For sure when we select a core we try to get as close as possible to the original application.
The 1974 Corvette's must be different than all other models that year as every single 1974 Chevy carb we have in the inventory has the round ball in the upper hole, and cruise control fitting in the lower one.
None of my 1974 cores have the EGR port in the baseplate or the vacuum port for the vapor canister. I would have thought by 1974 most if not all passenger car applications would have been using both, but none of my cores show either fitting in the baseplate.
They really aren't too difficult to add, but I would have to have the baseplate back here to do it......Cliff
jberenyi:
I can put the fuel canister port hole and port tube in the baseplate here at work. I just need to know if the carb needs to re-calibrated. I don't think it should but thought I would ask.
Cliff Ruggles:
No recalibration would be needed as those ports only provide a vacuum signal to the devices they are hooked up far as I know......Cliff
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