Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Custom Tuning on Weekends

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Cliff Ruggles:
Thanks, it's been a crazy summer so little time for weekend tuning.  I have been doing a few carb builds on weekends and a few local folks swing by during the week.

Yesterday had a customer come in with a 1967 Olds 442 carb that had a stripped fuel inlet.

Was hoping to just install a fuel filter housing with more threads but the carb had other issues so I ended up going into it.  The day before it was brought here the owner installed a rebuild kit from NAPA.  I told him the accl pump was junk and the N/S assembly was too small, and guess what?

The acc pump had already swelled up to nearly twice it's normal size and rolled right off the end of the cheap plastic pump when removed from the carb.  The N/S assembly was way too small for the Olds 442 engine so we replaced those items while we were in there 

The bottom plugs were leaking profusely even though someone had smeared a ton of JB Weld over them at some point.  So we got to make a repair there as well.

I attached some pics of the pump and seal removed with on of my seals beside it so you can see how much it swelled up in less than 48hrs contact with this new fuel.  It woln't even stay on the pump at this point.  The seal I sell will not swell up at all, even after many years of service and it comes with a lifetime warranty.......Cliff

Too Fast:
More proof about cheap quality stuff.  I bought a rebuild kit from Cliff about 9 years ago, I've had the top off to do some changes this summer.  The accelerator pump still looks/functions as new.

Cliff Ruggles:
Coincidentally I had the top off of the carb on my Ventura over the weekend.  I swapped the 8AN line back on from the regulator to the carb and forgot to blow it out.  Almost immediately after starting the engine is started running rough.  I shut it down and found a BIG pile of trash in the filter inside the fuel filter housing.  Looks like a mud dabber has set up home inside the line as it saw on the work bench for quite a while.

So I pulled the carb, blew it out, and the accl pump looked just like the day I installed it.  It's been in there since 2004 and went right back in for another 20 years or so!..........

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