BackFire! want it gone
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Cross-Country
Joined: Sep 2012
Posts: 74
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BackFire! want it gone
ts the 292. In a 64 f100 it has a new carb and new intake and has always backfired when letting off thegas at high RPMs or going down a hill... i am assuming the timeing is off but i dont know where to start in fixing the problem.
I am not a well knowledged mechanic so if its something thatt is complicated please tell me not to touch anyth
I am not a well knowledged mechanic so if its something thatt is complicated please tell me not to touch anyth
Thread Starter
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Cross-Country
Joined: Sep 2012
Posts: 74
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I have never seen flames from the back
I have not herd it through the intake.
I can tell you that i only hear it going down a hill or letting off the gas at hight rpms.
How do i richin it a little??
I have not herd it through the intake.
I can tell you that i only hear it going down a hill or letting off the gas at hight rpms.
How do i richin it a little??
Post Fiend
Joined: Dec 2013
Posts: 5,967
Likes: 2
From: Philly Suburbs, PA
mine was throwing flames out the pipes. what does that mean? (Sorry to highjack the thread, but, well, you know, i only care about me).
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Cargo Master
Joined: Jul 2006
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From: Concord, CA
Unburnt fuel in the exhaust. Rich.
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Post Fiend
Joined: Apr 2002
Posts: 19,311
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From: Waterloo, Iowa
Post a picture of the spark plugs. Those will tell the tale.
Reset your timing using a vacuum gauge, this eliminates slipped damper and other issues as a source of error in setting initial timing. Then use the gauge to set idle mixture.
Reset your timing using a vacuum gauge, this eliminates slipped damper and other issues as a source of error in setting initial timing. Then use the gauge to set idle mixture.
Post Fiend
Joined: Dec 2013
Posts: 5,967
Likes: 2
From: Philly Suburbs, PA
ack! that's me! i keep forgetting to put it in my car to get a shipping price. i will try to remember AGAIN tonight.
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Cross-Country
Joined: Sep 2012
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Thank you for the help.... sorry its taken so long to get back to the fellas helping me.....
New information.... so i just found out that my pops put in a coil that was supposed to have a regulater in it well i have not looked yet... but i dont think it does because shes burrning up points pretty bad...
So whats my next step? New coil? Reducer? I have no clue..
New information.... so i just found out that my pops put in a coil that was supposed to have a regulater in it well i have not looked yet... but i dont think it does because shes burrning up points pretty bad...
So whats my next step? New coil? Reducer? I have no clue..
Elder User
Joined: Feb 2014
Posts: 713
Likes: 3
From: Florida
Assuming the truck is stock, it is called a resistor wire. Check to make sure it is installed. It comes from the ignition switch - to a butt connector which then becomes the wire going to the coil.It should be pink in color and it will say resistor on it. Available at Napa auto parts, approx $24.00. Also available at NAPA Auto Parts is the correct coil for your truck, approx $50.00. Check and adjust the points. Install the above items as required. Once installed, it is also a good idea to check the mixture on the carb but a backfire in the exhaust is typical caused by a build up of un-burnt fuel / fuel vapor building up and then igniting in the exhaust when spark does return. The same thing happens if you were to drive down a hill, shut the ignition off for a little while and pump the gas, then turn the key back on. When the motor re-starts...BOOM!. We did it for laughs when we were stupid kids and usually blew the mufflers off dads car...good luck.
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