Hibernation Problem

[jvike]

I tried to start my cuda today.. it about time to get it out of hibernation since the winter soon is over. 
However, the 340 didn't want to start.. so I've pumped it, I've used start gas, and I've poured gas into the carb, on those three ocations it have started and accelerates straight into one million RPM! So I stopp it in fear of braking something. When I turn the key again It won't start. Backfire with the resulting fire in the carb are a common problem too! Can anybody help me?
Motor Spec: 340, Iron heads, Iron intake, Eddy 750 carb. Thanks!

[GoodysGotaCuda]

First off, DONT USE STARTING FLUID. Next,  , did you put any fuel stabilizer, or is there any sort of old gas in there? Possibly something is gunked up in the carb from sitting, or maybe just plain bad gas.

[Super Blue 72]

I'm not sure if old gas will cause that to happen.  Usually if there is bad gas usually won't there be a no start/ bad idle situation and not a high RPM situation? 

Is the linkage to the carburetor moving freely?  Anything holding the butterflies open?  Foreign object in carburetor baseplate? (Mouse snack?)

Possible vacuum leak?  Any mice get in there to chew up vacuum hoses? 

Do you smell a lot of gas when it's running?  Black smoke out the tailpipe like the carburetor is dumping fuel down into the manifold?

[MEK-Dangerfield]

This definitely is carb related. If you have any spark at all, starting fluid will help. I agree with checking your linkage. Also, is your throttle return spring doing it's job? It sounds like you have a REAL high idle, which could be caused by a return spring that doesn't have enough tension on it.


  Mike

[jvike]

I haven't touchted the motor since the car was put in the garage. It has had the air filter on it the whole time, so very litle could have entered the carb. I notised that the hole in the back of the carb was not plugged, can't remember if it ever was. Butterflies are moving feely but abit heavy becouse of the retrurn spring.

[Chryco Psycho]

well generally if it revs high when it  is started you have a major air leak under the carb somewhere & with a large port open that will be part if not all of it
 I would also check the brake hose & power brake booster if it has power brakes , you could have a major leak there too

[GoodysGotaCuda]

I haven't touchted the motor since the car was put in the garage. It has had the air filter on it the whole time, so very litle could have entered the carb. I notised that the hole in the back of the carb was not plugged, can't remember if it ever was. Butterflies are moving feely but abit heavy becouse of the retrurn spring.

That plug certainly better have something going to it, or plugged. That is what we'd call a nice BIG vac. leak if not. 

[jvike]

I think i found my solution on edelbrock.com! Great support site, I'll try that later this evening. Makes sense since I don't have powerbrakes.
http://www.edelbrock.com/automotive_new/misc/tech_center/install/dl/Excessive.320.wmv

[Super Blue 72]

Give it a whirl and see what happens! 

Was that plug removed or was there something there that was taken out?  Like a vacuum hose or something? 

[jvike]

It must have backfired and blowd it off, because I haven't touched my engine... Couldn't find anything to plug it with today, so I'll have to get one...

[GoodysGotaCuda]

wanna say its 1/4" npt 

[blown74]

Wouldn't think it would be a 1/4 npt fitting if a back fire blew it off. If you have a vac guage you might want to see what your levels are and how steady. If you have a really big cam you levels will be lower and jump a bit. Stock cam you should have I'm guessing about 14-22 inches of vacuum. Does that sound about right fellow mopar members. A quick shot of gas and that should drop 4-6 inches. A good running non race (Stock) motor should idle with steady vacuum.