Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Very rich at light throttle and cruising

<< < (5/5)

Overcamber:
somthing to add since my earlier post today> I checked the spark at every cylinder while its running and its bright and strong for what its worth.

so in frustration I removed the carb and started a further inspection.  First thing I noticed was that the primary metering rods hanger had 1 half of it really bent up..like about 1/8" higher than the other side> I thought for sure this was the overfueling problem.   

then I noticed that one of the main well bleed tubes was plugged at the end with a very hard substance(looked like an epoxy) I was able to grind it out after a period of time with a needle and flush it with brake cleaner. All the other orifices blew out clean.  I thought for sure that between the 2 things I found it would of cured my engine chugging and missing but its still the same...  grrrrrrrrrrrrr!

also the wide slot between both the primary and secondary flaps on the top is sealed with some sort of epoxy??( I think its the slot where you would put a float check tool in but I may be mistaken?  I can provide pics if needed?. is this normal? I know my carb I sent didn't have this?

thanks

thanks

Cliff Ruggles:
The best thing to do at this point would be to send it back and we'll test it on our test engine and see if it has the same symptoms.

Backfiring is seldom a carb issue.  Most often it's an ignition issue, or worn cam lobe, stuck/sticking valve or broken valve spring.

Not sure how the power piston arm could be bent, we spend a lot of time making sure they are exactly even on the APT carburetors and verify that the carb works correctly on our test engine.  If they are off some it shows up quickly.

We block the "slot" in the airhorn or use the factory divider plate.  This keeps fuel from being sucked over into the secondaries when the flaps first open......Cliff

Overcamber:
Ok Cliff , going to check a few more things and will let you know what I decide .
Thanks

Overcamber:
Well after further troubleshooting I've found my problem.  Cliff you were right! ( no suprise) . Went out to look for a 5,7 crossfire with my new wires I installed before I put it away for winter storage .  I didn't have the crossfire problem but did notice I had 2 plug wires side by side on the wrong posts on my distributer cap.  I gazed in disbelief and couldn't believe my eyes !! Embarrassing to admit .  I had a carb problem last fall and changed the wires because they were old .  It was at that time I introduced a 2nd problem besides the carb problem and never gave the firing order another thought assuming it was correct .  I learned a lot through all this and corrected a lot of problems I had going on under the hood .  The carb is now setup and runs perfectly .  Just want to thank everyone for all their input( especially Cliff for the support through this whole ordeal )

Cliff you have a pm from me regarding the choke pull off

Cheers. Gary

Overcamber:
Send you another pm cliff
Thanks

Navigation

[0] Message Index

[*] Previous page