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JayRT70 · Charger R/T Member

Guys,
I installed my rebuilt 440 a little while ago. Long story short, the car runs good when cool / warm. However, when I drive it for a while in stop and go traffic and it really gets up to temperature, it wants to stumble and die when I come to a stop. I have to two-foot it (it's an automatic) to keep it from stalling. I have a six pack set-up. I have checked all over for vacuum leaks and as I said, it runs good unless it's really hot. Any thoughts? Could it be crummy gas boiling in the float bowls or something? This is really annoying because it makes for tense driving always having to worry if it's going to die on me!

472 RT/SE · Moderator

Are you running a vapor separator?

If not, I would start there.

TX9 Charger · XS29V0G Member

Mine did the same thing & with a four speed the feet were flying around to keep it from stalling and worse yet getting the embarrassing TLC disorder (traffic light cranking) Believe it or not I bumped the timing up a couple degrees & it quit. Like yours, it only did it when outside temps were really hot. You may want to check the float levels first too.

Charger Downunder · '70 Charger Member

Check float levels sounds like they are too high.

70charginglizard · Gang Green Machine Member

agreed. check that float level.

you may also want to examine your exhaust system for leaks at the head or connection pipe area. a small exhaust leak there can throw exhaust heat back into your engine compartment in stop and go and add to
overheating issues.

Are your carbs new? They may be running too lean. Might want to richin up ur mixture.

ahum

Just a thought.

JayRT70 · Charger R/T Member

Thanks. I'll check float levels - how do you do that? I've heard conflicting things about that but usually you're supposed to have gas just barely trickle out (at idle) when you remove the screws. Is this correct?

I'll also play with moving the timing up a bit. I've been running with the vacuum advance and overall, it seems to make the car run better. This problem seems to happen with or without the vacuum advance.

I just got done driving the car and it was at full temperature and still doing this. When it dies, it usually "sneezes" - that means lean doesn't it? So far, it's been starting right up when it does die. I've tried richening mixture screws but that doesn't seem to help.