Question about 1997 Dodge Ram 2500 Club Cab

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Intake backfire in hot run good at cold - 1997 Dodge Ram 2500 Club Cab

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  • John Remenyi May 11, 2010

    Could be stuck valve(s). How many miles, what engine?

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2000 dodge ram 5.9 intake backfire at1800 rpm. only 1 time here and there

Posted on Jan 27, 2010

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Why does it run well, then backfire and stall?


make, model, year? backfires are spontaneous burning (exploding) of unburnt fuel outside of the combustion chamber. suspect bad spark plug/s, ignition coils, ignition timing, computer, leaking fuel injector, etc. scan for trouble codes, then post back. because the problem is intermittent, problem manifests only when hot (engine at operating temperature) do tests for both cold & hot conditions. test resistances (ohm) of suspected sensors: cam & crankshaft position sensors, ignition coils (if possible),(search the web for the recommended procedures). also test voltages at the computer (search the web for the pin outs of the computer of your car). also check associated relays (like for the fuel pump, etc.) a bad relay may have its coil open when heated, then becomes good again when cold. i suspect the car may have a good fuel delivery but the sparks are not coming in on demand, thus backfiring.

Oct 11, 2015 | Cars & Trucks

2 Answers

Why does my truck backfire thru the carborater when it is hot outside?


A backfire is caused when your intake valve/s aren't closing completely before ignition in the cylinder. This ignites any fuel/air mixture left in the intake manifold. Fine tune your timing.

Aug 15, 2012 | Cars & Trucks

1 Answer

2000 Jeep Grand Cherokee back fire


Backfiring is caused by unburned fuel igniting in the exhaust system, which could be the header, catalytic converter, muffler or exhaust pipe. Red hot is caused by the burning fuel. You either have a timing issue or you are not getting enough air flow into the fuel injection system, which can happen for several reasons. I would try to find a good local mechanic and pick their brain.

Dec 28, 2011 | 2000 Jeep Grand Cherokee

1 Answer

My 2001 dodge durango dies right down when started even hot or cold it back fires i have changed the sensors it does this in open loop to closed loop


Backfiring is a great symptom because you know what the problem is right away. It seems to be a timing issue. Crankshaft positioning sensor, distributor, electronic ignition, etc. Diagnose your problem concentrating on anything to do with timing. Vehicle just don't just don't jump timing unless something goes wrong of someone does work to it recently. If it backfires from the the exhaust you timing is advance and if it backfires from the intake it's retarded. It's is your firing timing.

Mar 20, 2011 | 2001 Dodge Durango

1 Answer

My 93 towncar runs rough cold. it backfires up through intake i replaced plugs, wires and one coil pack, coolant sensor. i read codes 226 and 542. it runs ok warm, but can still hear misfiring, it feels...


YOU HAVE INTAKE MANIFOLD LEAK ALSO COULD HAVE BAD OR STICKING INTAKE VALVES. CODE PO 226 IDM SIGNAL NOT RECEIVED AND CODE PO 542 FUEL PUMP SECONDARY CIRCUIT.

Mar 12, 2011 | 1993 Lincoln Town Car

1 Answer

My 1993 Suzuki Samurai will not idle when hot.Idles perfectly when cold.It also backfires when running against compression.



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Check for vacuum leaks with a can of carb cleaner-engine running-spray all around intake and vacuum hoses -if you here the engine bog down or race up there is the leak-too spray around EGR valve.



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Jan 31, 2011 | Suzuki Samurai Cars & Trucks

1 Answer

I have a 96 chevy blazer with a 4.3 vortec rough


Do a compression test on all of your cylinders when it is cold. Backfiring is a sign of a worn valve seat allowing mixed fuel and air (lit by spark) to be forced back into the intake. You will probably see compression loss on one or more cylinders.

Also... there is a chance that the EGR valve is not totally seated when the engine is cold with just a small blow by. The EGR valve seats coke up over time with black gunk.

Jan 28, 2010 | 1996 Chevrolet Blazer

1 Answer

Vehicle cuts out and even backfires (blacksmoke) when driving down road does not die just does not run smooth. Changed oil twice oil is black, fluids to help clean, pluggs are good, wires are good when it...


If it seems to run better when it's first started (cold) and gets worse as it warms up. You can try disconnecting the coolant temp sensor and jumper the terminals in the connector (wire side) with a paper clip. The coolant temp sensor is either in the intake manifold or the thermostat housing and has a 2 wire connector. Jumping the connector will make the computer think that the engine is hot (warmed up) and will not richen the system. If doing this helps then replace the coolant temp sensor. Hope this is helpful.

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