help troubleshooting

[NEK5]

So I bolted the remanned q jet I got from JEGS yesterday. She started right up, and all we screwed with was the idle because when it was low it wanted to die. When it go up to temp, it sounded like the idle was erratic. Started screwing with the idle again and ended up stalling it. At this time the engine was a little hot (around 200 degrees) we couldn't get it to start back up. Let it cool down to around 175, and pushing the choke flap closed a little bit we got it running again.

Now, keep in mind, neither of us (me and my buddy) know much about the q jet (ie how to tune it). I got some stuff I've yet to read about it, but I need to eventually.

Any ideas?

Vapor lock? I don't have the canister hooked up, just a small line running off the vent on top of the tank.

Could it be boiling the fuel?

 

[ktmoutfront]

What motor and why is it at 200 degrees idling? Q J's have 2 screws for the fuel mixture in the base. The motor should be running at about 800 rpm. Then run the screws in and out and listen for the stumble each direction, set it in the middle of the clean running zone. May have an issue with fuel boiling into the carb. Is there a heat shield under the carb?

 

[NEK5]

What motor and why is it at 200 degrees idling? Q J's have 2 screws for the fuel mixture in the base. The motor should be running at about 800 rpm. Then run the screws in and out and listen for the stumble each direction, set it in the middle of the clean running zone. May have an issue with fuel boiling into the carb. Is there a heat shield under the carb?

I think the timings still off, and my thermostatic switch for the fans is screwy

No heat shield under the carb...should there be?

EDIT: mild 350, mild cam/vortec heads/edelbrock vortec eps intake.

 

[ktmoutfront]

Q Jets are notorious for boiling over. On the late 70's motors there was a thin shield that went under the carb. If it was not on the motor, it ran until operating temp, then loaded up as the fuel boiled in the bowl.

 

[NEK5]

ttt!

any idea where I could find one of those heat shields?

I know my fuel lines are a little close to the exhaust, should I be putting something on them? ie wrap of some sort?

I printed out a book worth of crap on how to tune the q jet, now i just need to read it haha

 

[fmstruck]

Get the timing right first. It's hard to tune the fuel system if the ignition system is doing screwy stuff.
I run into this all the time with irrigation engines. People automatically figure they have a fuel problem when they in fact have a spark issue.

 

[NEK5]

Get the timing right first. It's hard to tune the fuel system if the ignition system is doing screwy stuff.
I run into this all the time with irrigation engines. People automatically figure they have a fuel problem when they in fact have a spark issue.

yet another thing I know little about. guess I better print out some stuff on that too I'm learning more and more everyday with this project, and up until now it's mostly been learning by doing. I've come a long ways, that's for sure