carb issue?

[Fordum]

Well, the problem with throwing parts at a problem is not so much the cost, as the fact you might not fix it.
But, if you can find one on Sunday, and its reasonably priced, I would consider an ignition module at this point.
Even though they are common to fail, and are fairly cheap, I would not normally advise just trying one without trying to verify no spark, but you say you need this running today.

Fuel problems are not totally ruled out, but I am leaning towards spark. And the most likely thing to kill it after running for a while is the module.

If you do a spark check, it should be nice and blue. Small and yellow is a problem. I would take a plug wire off first and put it back on to loosen it up.
Then have a screwdriver or a spare plug ready.

Run it until it quits, then put the screwdriver into the end of the plug wire and put the shank next to a ground, or put on the spare plug.
Crank it and watch the spark.

With any luck, you will not have one. In this case bad is good. If you have no spark, it shows you where to start looking.

A failing module could cause a weak spark, which would cause the hard starting problem, and then it could quit completely causing it to die.

 

[greengiant0311]

Ignition module = HEI ?

 

[Fordum]

Not exactly, heck, man, don't confuse me with details, I run a Ford so I don't have these problems.........

Anyway, there is a module attached to the dizzy that controls the spark. I checked your profile and it says 1980, so I went to RockAuto and got this.

http://www.rockauto.com/catalog/raframecatalog.php?carcode=1297706&parttype=7172

Should work. That gives you an idea of what you are looking for. From what I have read here, if you can find a genuine GM part, you are better off. And make sure to put a film of heatsink compound under it when you replace it.

Also, it seems pretty universal that getting it checked at parts stores is a waste of time.
A dead one will show up bad, but one that is intermittent will often check good.
You can probably do a search for ignition module here and find hundreds of posts.
Most folks who go offroad have at least one spare with them, and I suspect some carry more than one.

If you go that route, be sure to examine everything in the dizzy while you are there for problems.

 

[greengiant0311]

ok so i went out and made sure i have enough gas and put the choke back together. hard to start still but once it started it ran high RPM like i have the linkage from the choke wrong still and the high idle is stuck. Also when i shut the engine off had gas shoot out of the top of the carb!

 

[Fordum]

OK, just dropped in for a second, got people over.

I'm gonna go out on a limb here, and figure you might have a little something wrong with the carb rebuild.
Gas shooting out of the top of the carb is not something you want to have happen on a regular basis.
The engine did not try to backfire did it? That will cause a mist of gas to shoot out the top.

You need to check the throttle linkage and the choke linkage. Look into the throat with the engine off, and see if the butterflies are closing. If not, see what it holding them open.
That should be the cause of your high idle.

 

[Deuling]

I just looked back and it seems you had the same hard to start issue before. You need to check your timing. To far advanced iirc will cause hard start and rough running. Also make sure all your plug wires are hooked up in the correct sequence. Ive seen rigs run with a couple in the wrong spots. Ran but very rough.

 

[greengiant0311]

Well i did the rebuild and took it in to a shop to get it all dialed in. After phone calls and pickining it up driving it home and it still running like crap, I finally got to talk to the man working on thetruck. He says there are internal issues with the carb, so the rebuild kit was worthless. Now I need a new carb. Whats the best carb out there? Need to know today before I head in to town so i can pick one up or if i have to order it the sooner the better. Needless to say the wife is pissed so the cheaper the better.

 

[dyeager535]

I'm a little leery of credibility that he said the carb is shot and you need a new one. Carbs don't just magically fail, Edelbrock is not a fly by night company, highly unlikely the housing cracked, which is about the only thing I can think of that would render it useless, short of sitting around for decades with bad fuel or water in it. But sounds to me like the problem got worse, not just developed all of a sudden...