backfiring... how do i make it stop
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Freshman User
Joined: Mar 2003
Posts: 42
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backfiring... how do i make it stop
i was coming home a week ago and truned on my lights. well my truck would not accelerate at all it was barely maintaining its speed. welll after spitting and studdering it make fired. i turned off my lights and that fixed the problem i just need to know how to drive with my lights on. does anyone know where i can get a engine wiring harness for my truck it looks bad. its not just the lights if i roll down the windows (power) the truck messes up too.
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
backfiring... how do i make it stop
Sounds like a lack of power either into or out of the coil. Without enough spark, you will get backfire from unburned fuel in the hot exhaust system. Check your coil connections and make certain that your alternator is working under a load. If the voltage drops significantly when electrical accessories are turned on, you could have lost the voltage regulator in the alternator. If the problem is there, its alternator time. If the voltage is good, the coil is on its way out and is drawing more amperage from the alternator to compensate for the lack of output. Thereby effectively reducing the available amperage for the remainder of the electrical system.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
backfiring... how do i make it stop
I would also look at your battery cables. if they show any sign of corrosion you might think about replacing those with good 1 gauge wire. but it sounds like your alt is going. also what kinda of carb are you running, if it has a lot of miles on it , could be needing a rebuild
good luck
later
good luck
later
Junior User
Joined: Sep 2002
Posts: 60
Likes: 0
From: San Diego USA
backfiring... how do i make it stop
Soundl like an alterntor to me too. Might want to the wires and connections for fraying first. Specifically check: Battery Cables, Coil wires, alternator cable, ignition wires - if it's not one of those, odds are bad alternator. An oil leak could also gunk up the alternator hot or ground connection. Some auto parts stores will test your alt for free, to eliminate that.
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