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Author Topic: Backfire at WOT  (Read 4198 times)

Offline MrFiveOh

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Backfire at WOT
« on: October 11, 2016, 02:50:08 pm »
So this morning while headed to work "Smurf" was feeling quite chipper in this 50 degree Texas morning weather. Got up to 70 no issue, decided why not and went WOT. I noticed upon putting pedal to the metal there was pop/backfire from the exhaust and slight hesitation. It only did it when i went WOT, if i hold WOT its great, only upon initial WOT. Could this be a cold weather lean issue? never did it during warmer weather.  74 C10 Edelbrock 1406 SBC350

Thanks
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1974 C-10 AKA "Smurf"
350/700R4 Hooker Headers 134-A A/C
4/5 Drop - Ridler 650 rims 20x8.5/20x10
Kenwood single din radio 2 IB-Flat Pioneer Subwoofers Rockford Fosgate Power 1000-bdcp amp

Offline philo_beddoe

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Re: Backfire at WOT
« Reply #1 on: October 18, 2016, 05:31:48 pm »
Mine had a small pop at the carb, advanced timing a little and now faster and smoother, no more pop, ever.
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Behold, the day of the LORD cometh, and thy spoil shall be divided in the midst of thee.  Zechariah 14:1

Offline MrFiveOh

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Re: Backfire at WOT
« Reply #2 on: October 18, 2016, 09:32:34 pm »
Quote from: philo_beddoe on October 18, 2016, 05:31:48 pm
Mine had a small pop at the carb, advanced timing a little and now faster and smoother, no more pop, ever.
After talking to a couple of my club guys they are saying the secondaries on my carb are not opening properly. suggested i get a tune kit and rebuild it as well
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1974 C-10 AKA "Smurf"
350/700R4 Hooker Headers 134-A A/C
4/5 Drop - Ridler 650 rims 20x8.5/20x10
Kenwood single din radio 2 IB-Flat Pioneer Subwoofers Rockford Fosgate Power 1000-bdcp amp

Offline philo_beddoe

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Re: Backfire at WOT
« Reply #3 on: October 18, 2016, 10:12:50 pm »
Very well then. My advice was from the guy who installed my engine. That may be it, but its good to get a couple opinions on this site.
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Behold, the day of the LORD cometh, and thy spoil shall be divided in the midst of thee.  Zechariah 14:1

Offline Irish_Alley

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Re: Backfire at WOT
« Reply #4 on: October 19, 2016, 07:56:41 am »
ive noticed my mud truck will pop like crazy when its not advanced like 16°s or when theres holes in the exhaust
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline MrFiveOh

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Re: Backfire at WOT
« Reply #5 on: October 19, 2016, 08:26:51 am »
Quote from: philo_beddoe on October 18, 2016, 10:12:50 pm
Very well then. My advice was from the guy who installed my engine. That may be it, but its good to get a couple opinions on this site.

Of course, I am by no means disregarding your advise.
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1974 C-10 AKA "Smurf"
350/700R4 Hooker Headers 134-A A/C
4/5 Drop - Ridler 650 rims 20x8.5/20x10
Kenwood single din radio 2 IB-Flat Pioneer Subwoofers Rockford Fosgate Power 1000-bdcp amp

Offline gunrac

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Re: Backfire at WOT
« Reply #6 on: October 19, 2016, 11:58:28 am »
may want to check your springs an weights  "Mechanical Advance" inside your distributor......make sure they are good an clean. they should snap crisp an freely, flipping them with your fingers. 
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