Power suddenly dies at throttle...

[65shlbycln]

I drove around today for about an hour. Its about 85 degrees here in Hot-lanta, and very very humid. After about an hour of driving, i stomped on the throttle, and got an unexpected result.

I still dont have a tach yet. When i stomped on it, i got a surge of torque and it pulled hard for about a thousand rpms, and then around 3k, the power just completely died. It was like i just completely let go of the throttle. It was pretty much an instantaneous loss of horsepower. I was pretty stunned, so about 1 minute later i tried it again, and it was fine all the way through the rpms. It pulled really hard. About 20 minutes later of casual driving, i stomped on it again, and got the same results as the first time. I got about a second of acceleration, then it instantaneously died off. And again, i came to the next light, gunned it from a stand still, and it was fine.

Since its pretty hot and humid outside, is that the cause of the random power loss? The temp gauge was reading really cool, but it is possible that when i was flooring it a few times, that it was sucking in really hot air and power was just dying? I have a hood scoop and a hole in the hood, so it is bringing cool air into the back of the engine bay.

Any suggestions?

 

[KillerKittyCat]

Can you say "VAPOR LOCK"???????

Where is your fuel line routed?? Is it a hose, laying on the manifold, or next to heater hoses??

 

[65shlbycln]

Is that what it is?

It is routed kind through the front wheel well to stay away from the headers, makes a 90 angle with the right side of the engine bay where it pokes through, 45 degree angle up to the distributor area, and then a right hand turn over to the left side of the carb.

Is this a serious problem? Or should i just get used to it?

Its a metal line up till it reaches the carb. Should i wrap this in some kind of insulation?

 

[KillerKittyCat]

Check your fuel pump pressure. (Check HOT!!)
Replace your fuel filter.

How close are the headers to the fender well?

 

[Snail50]

when I bought the 67 I have now, there was a wooden clothes-pin on the metal fuel line right before the pre-carb fuel filter. The PO said he had vapor lock once, and a mechanic friend told him to put the clothes-pin on the line to absorb heat. He said it never vapor-locked again after he put the pin on there.

 

[2nd Mustang]

Eighty five degrees, kid stuff. Here in So Cal, mine has never vapor locked during driving. It did give me trouble during really hot weather when I park and try to restart, but it will restart, even hot. As Killer Kitty Cat mentioned, I would check the fuel filter and even the air filter. A plugged filter will do some strange things.