Question For The Experts

[N96]

My 71' 340 died on the way home last night. Here what its doing. Died while idling, after about 10 minutes it will start again, idle for about 10 seconds then die, wait 10 minutes and will start again. If the rpm's are kept up or you drive the car its ok, but as soon as it idles it dies. Prior to this the car sat about 5 hours, pumped twice before starting and car was flooded. after a couple minutes of higher rpms till it smoothed out i started driving. 5 miles later it started dying out. i was thinking carb, but i would appreciate any other input. THANKS!!!!

[MEK-Dangerfield]

It sounds like the carb. is flooding you out. What kind of carb. is it? Maybe too much fuel pressure? My guess is something internal on the carb. though.


  Mike

[422STROKER]

I agree prob a holley carb out of adj or dirt in the needle/seat try lightly tapping the fuel bowl and check the adj through sight hole.  Good luck.

Tom w/MEK

[N96]

thanksfor the replys so far, its a carter thermoquad. started it today, it idled a little rough for 5 mins or so then died. tried cranking without touching gas pedal, carb backfired. anyone know how to check the float on those???

[Chryco Psycho]

the carb has to be taken apart to check & adjust the float level , the problem with doing that is you really cannot adjust for fuel pressure which will alter the float level

[422STROKER]

Got to check for straightness w/thermoquad of the body when you take it apart  too.  Could be causing your prob if its cracked or warped.

Tom

[Alaskan_TA]

I had a similar problem years ago, I had a Mallory distributor and the little light thingy in it was dirty. I rebuild carbs, swapped carbs, new timing chain, everything I could think of and all it took was 20 seconds and a Q-tip to fix it.