Pull off does not release when Engine Off

[rhinosoft007]

I Noticed that when engine is running the secondary solenoid is working fine (pulled in) but when engine is switched off it does not release at all. It is a new solenoid from Cliff, just mentioning to indicate not old.

You can see what I am talking about in the video I put a link to below. Please click the link and then click the video to view it in full screen.

If I squeeze the feed tube from the solenoid to the carburetor, it will release.

Could this be a 'feature' of my Quadrajet on my 350 Cutlass or something is wrong? I am having issues to do with secondaries not opening under full throttle so thought I'd add that. At full throttle, the engine keeps accelerating but not what I'd expect and carb 'roars', hard to explain.

Thanks for any thoughts.
Graeme

Click this link to view video of what I am looking at - don't worry, its' just a carb!!    
https://photos.app.goo.gl/M3egJoY8WyKvcf3C9

[Cliff Ruggles]

Remove the pull-off from the carburetor and compress it and hold your finger over the end.  When you remove your finger it should open quickly, it appx 1 to 1.5 seconds.  If it passes that test the pull-off is fine.....

[rhinosoft007]

Thanks Cliff, thought I would ask the question and yes, it does that.

Could be that the secondaries not opening is related to the reply to my post back In late 2023. I apologize for not seeing this and responding when you posted it.

Right to start with you do NOT have enough camshaft in the engine so it's going to be octane sensitive.  252 seat timing is WAY too small for a 350 CID engine over 9 to 1 compression.  The tight 110LSA just makes it worse closing the intake valve WAY too soon which narrows up the power curve and spikes dynamic compression pretty high early in the RPM range.  Olds engines also use dished pistons (most of them) and crappy combustion chamber shapes.  Between the bathtub chambers and too much quench area they tend to run hotter and ping easier than other designs.  A LOT of quench area is NOT your friend with these things BTW.

I'd yank the cam and tink it off the nearest dumpster and install a cam with about 20-30 degrees more seat timing and wider LSA.  Summit sells a 214/224/112 cam that will work much better than the tiny little Comp Cam you are currently using.

I've ran into EXACTLY the same issues you are several times with engines in the 9 to 9.5 to 1 range pinging with any heavy load on them and I couldn't pull out enough timing to make them stop.  Every single time they had a short seat timing Comp Cam in them on a 110LSA......FWIW.

As far as Comp Cams valve train parts, specifically their "roller tip" rockers.....absolute and complete JUNK!  I have yet to remove a set from on engine that weren't blue or even black where the poor fitting grooved rocker balls were wearing heavily into the bodies.  The grooved rocker balls and poor fit to the bodies are also a design flaw.  Instead of the oil "pooling" and running out on the tips of the rocker arms to get atomized for cooling and lubrication it runs straight down the studs and back to the sump....duh?

I'm also NOT a fan of their heavy retainers and they recommend WAY too much spring pressure for their tiny little flat camshafts which is really hard on everything in the valve train and a big contributor to all the wiped out lobes we read about every time we log on to a Forum related to this hobby......FWIW......

[Cliff Ruggles]

If the choke pull-off releases not installed on the carb then refuses to release when installed you have a problem on the choke side of the carb where the pull-off intersects with the choke parts.

Unlikely.  The cam is too small and LSA too tight.  I'd put a bigger cam in the engine and make sure you aren't running a butt-load of spring pressure on it. 

Comp Cams valve train kits typically have WAY too much spring pressure for "mild" engine builds.  Their roller tip rocker arms are garbage too, but that's another topic for another day......