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I have a 92 ford bronco 5.8 that keeps back fireing through the intake and sending flames out the exhaust. Not only that but the exhaust manifolds are glowing cherry red and it has no power at all. This is what I have replaced already fuel pump, fuel filter, map sensor, module, and the complete distributor. Does anybody have any suggestions besides the ECM? Oh and I also removed the cats, so that it's running straight into the flow master.

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  • Cars & Trucks Master
  • 1,051 Answers

The back firing makes me think that when you put the new dist. in you got it one-half a tooth off. I would bring #1 cyl. to the top and remove the dist. cap and be sure the rotor is pointing to #1 in the firing order.

Posted on Jun 24, 2017

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 92 ford ranger

check your vacuum lines if one is off then it will do that too.

Posted on Jun 29, 2008

emissionwiz
  • 76649 Answers

SOURCE: 1995 Ford Bronco 172 EGO not switching lean bank1- jerks when run

Have u checked for vacuum leaks or poss leaking EGR valve? use carb spray around the upper intake manifold where it bolts to the lower manifold, spray vacuum lines where they are connected to the engine vacuum ports, the idle speed will change if u hit a leak, as far as the EGR valve goes see if it gets hot at idle, if it does it is leaking, if all checks ok replace the O2 sensor, but i suspect u will find a leak at the upper intake plenum.

Posted on Jan 10, 2009

cognac222
  • 4 Answers

SOURCE: 89 Corsica: no power, hesitates in drive, idles

Check your fuel pressure, and or injectors. You may have too much fuel getting into the engine causing it to burn rich and overheat the converters.

Posted on Apr 26, 2009

Tnsiouxfalls
  • 617 Answers

SOURCE: S10 blazer lacks power, bogs under acceleration

Check your coil output, buy a cheep spark tester. Pull of a spark plug wire and plug in the tester(ground the other end), set it to bridge a gap for 30,000 volts.Have someone start it and make sure the spark will jump the gap on the tester.Danger-Very high voltage! It will light you up if your touching the tester while the car is running!You'll be able to see a bright blue spark(and hear it as well) if your coil is good.If it's a yellow thin spark it's probably the coil.
If you have good spark, check the fuel filter and fuel pressure at the fuel rail.
Back firing could be timing,cam position or crank position sensor.Worst case scenario, timing chain or belt.

Posted on Jul 27, 2009

  • 15 Answers

SOURCE: 2001 nissan altima code says cylinder 1 miss fire.

a lot of people have reported this issue with the 2001 Nissan altima. it is a design flaw and the idle rpm fluctuation is caused by a bad intake manifold gasket. the part only costs about 10 dollars but do to the 5-10 hours it takes to replace it is a very costly on the labor side

Posted on Feb 05, 2010

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sounds like it is running lean. Check engine light on?

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What causes our 1986 chevy motorhome to back fire through the carburator? This occurs when you first take off, it stops after awhile when warmed up. Carburator has been rebuilt, new plugs, wires and cap....


Backfire in an automobile engine typically results from various malfunctions related to the air fuel ratio. Backfiring can occur in carburetor engines that are running lean where the air-fuel mixture has insufficient fuel and whenever the timing is too advanced. As the engine runs leaner or if there is less time for the fuel to burn in the combustion chamber, there is a tendency for incomplete combustion. The condition that causes this is a misfire. The result of a misfire or incomplete combustion is that unburned fuel or flammable hydrocarbons are delivered to the exhaust manifold where it may ignite unpredictably.


When starting an engine, timing that is too advanced will fire the spark plug before the intake valve is closed. The flame front will travel back in to the intake manifold, igniting all of that air and fuel as well. The resulting explosion then travels out of the carburetor and air cleaner. A common air filter will allow the gases to escape, but will block the flame front. On many small marine engines, no air filter is used, but a screen is placed over the intake of the carburetor as a flame arrest to prevent these flames from escaping the intake, and potentially igniting fuel, or fuel vapors in the enclosed sump or bilge of the boat and causing a fire or explosion. Improperly adjusted carburetors that create a lean condition during acceleration can cause the air fuel mixture to burn so slowly, that combustion is still taking place during the exhaust stroke, and even when the intake valve opens. The flame front can then travel up the intake and cause a backfire. In this situation it is conceivable that there is a backfire occurring in the intake manifold and exhaust manifold simultaneously.

Good luck and hope this helps, check the carburetor settings to make sure it's not running too lean and the timing . Keep me posted, be glad to help you get your RV running 100% again.

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What is the firing order for a 2006 ford tauras


Sir,
There are two firing order sequences for the FORD V-6. It depends on which engine you have. The first is 1-4-2-5-3-6. The second is 
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Link 1
Thanks Good Luck
Appreciate to rate as "Fixya"

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1995 Ford Bronco 172 EGO not switching lean bank1- jerks when run


Have u checked for vacuum leaks or poss leaking EGR valve? use carb spray around the upper intake manifold where it bolts to the lower manifold, spray vacuum lines where they are connected to the engine vacuum ports, the idle speed will change if u hit a leak, as far as the EGR valve goes see if it gets hot at idle, if it does it is leaking, if all checks ok replace the O2 sensor, but i suspect u will find a leak at the upper intake plenum.

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Part of the air filter system that uses hot air from the exhaust manifold to warm up inlet air during cold weather operations. It is actuated by a vacuum hose connected to the intake manifold by a check valve that goes to a small actuator valve in the intake snorkle of the air filter container. Make sure the vacuum check valve is in series.

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