Engine help

[solomon]

let me know if it runs on staring fluid.

 

[neebles]

I wasnt able to try starting fluid, but when we put some drops of gas, directly into the carb, it would fire up, but then die again when it burns off. I just dont understand, the carb is clean, gas is getting through it when the gas line is connected and gas is flowing, the spark plug is wet, we have spark. My cousin, after looking at it, asked if it could be a timing or compression issue.....I would have no idea?????

 

[Kaptain Krunch]

If it runs with a squirt of gas in the carb, your not getting fuel to the plug, its as simple as that. dirt carb is probably the problem, may look clean but it doesnt take much to clog a jet. Blow through all jets and passages in both directions with compressed air, use a small piece of wire if jet is badly clogged.

 

[neebles]

But the plug is wet.......

 

[neebles]

I do have a bigger jet I could try if you think that would make any difference. I had taken the jet that was in there out, and blasted it with Carb cleaner, its clean, we can see right through it.....

 

[solomon]

check your coil gap, and make sure the wire in the spark plug boot is connecting to the spark plug and that its not sitting back a little in the boot. Lastly change the spark plug.

 

[neebles]

OK, I will give it a shot tomorrow! Thanks Solomon

 

[solomon]

Let me know!

 

[Kaptain Krunch]

didnt read the first page, you said you have a pulse fitting, where is that going? if its not connected to anything thats your problem.

What kind of carb do you have, is it the stock carb? or an aftermarket mikuni?

 

[neebles]

The pulse fitting is what im using to run the fuel pump. It is sitting between the air filter, (its basically an intake manifold) and the carb itself. I have tried it on the other side of the carb too, and it really doesnt make a difference.
The Carb is stock......

 

[neebles]

Side note, last night while fiddling with it, while trying to start, I opened the throttle a little, and it started for a brief moment, the wheels spun....But then I couldnt get it to do it again. Im at a total loss at this point.

 

[robbie]

What if you plug the hole where the pulse fitting goes, and connect the fuel line to a tank that's elevated above the carburetor? It could be that your system just isn't getting fuel to the carb.

 

[neebles]

yeah we have tried that too. I think tonight im going to take the whole fuel system off, go back to gravity fed, and see if I can get it running from that point. If I cant, I at least know for sure its not the manifold/pulse fitting/ fuel pump that is causing the problems. I know the system is getting gas to the carb, because, well, the carb is full of gas. I drain it, it fills up again.

Again, could poor compression cause it not to fire up? I dont THINK that is the issue, but I going to gauge that tonight too. What kind of compression readings SHOULD i be getting? (sorry im really new at this) Also, could it be a timing issue? What sort of things could mess that up if any. The engine was working fine until I started messing with it. I did remove the stock throttle system and added an aftermarket ARC racing plate, to mount the fuel pump too, and that came with a new actuating system. Could the fact that I removed the stock throttle system have ANYTHING to do with it? Ill toss that back on if I have to.

 

[robbie]

Even if you have spark and compression, your engine may not run due to flooding. You have to have fuel and air, but if you have way too much gasoline then you don't have room for air, just evaporated gasoline. If that's the case then you'll never get it to start up.

If your engine ran just fine before you started working on the carburetor, it's logical to assume that your problem is in fuel delivery, in this case maybe too much.

I think you're on the right path by simplifying and going back to a gravity feed system. If that works, then you can be sure that nothing else is wrong.

 

[neebles]

Went back to the gravity fed system, no change. Does the exact same thing.

 

[robbie]

Is your float stuck?