Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Bad rebuild?

(1/2) > >>

slicer87:
 I took the CCC Qjet that was in my MCSS out to inspect it since I have been having idle adjustment problems with it. I had a local carb shop rebuild the carb last year and now some red flags are showing. I found gas dripping out of the TPS sensor. Also both the M/C sol and TPS connectors have been painted to look new, (the paint is now starting to flake off). Are these signs of a poor rebuild?  :-\

slicer87:
 Found one more problem, one of the forward air horn screws is not tight but I can not turn it in or out, it seems to be frozen. Hope it is not stripped.  >:(

Cliff Ruggles:
I've never seen anyone paint TPS or MC solenoids.  Not sure if that was done for cosmetic reasons or to look like new parts were installed?

Don't know how fuel can leak out of the TPS area, it's not in the fuel bowl where it goes thru the casting?

Pretty rare for those screw holes to strip out, or the screws to get stuck unless the unit spent some time outside in the rain and heavily oxidized/corroded, etc.....Cliff

slicer87:
 Found out the problem with the screw, it had defective threads. It looks like the shop replaced the screws with new ones but one was bad. The treads in the carb casting were not badly damaged so I was able to clean them up with a tap and install a used, good screw from a junked Qjet I had lying around. I wonder if the lose housing scrw ay have been the source of my problems since it could have caused cross leakage inside the carb? The defective airhorn screw was at the front of the carb by the TPS.

Cliff Ruggles:
Unlikely one loose screw would cause a fuel or cross-leaks.  The later carbs used a LOT more screws than earlier units right to start with.....Cliff

Navigation

[0] Message Index

[#] Next page