Backfires starting will not start back fires 1 time then just turns over checked fuel & spark i have both

There are several things that could be causing your 2002 Dodge Ram 1500 to backfire through the intake and not start properly. Here are a few things you can check:

1. Check the spark plugs: If the spark plugs are worn out or not functioning properly, they can cause the engine to backfire and not start. Check to make sure the spark plugs are in good condition and are properly gapped.
2. Check the fuel system: If the fuel system is not delivering fuel properly, the engine may not start. Check the fuel pump, fuel filter, and fuel injectors to make sure they are working properly.
3. Check the ignition system: If the ignition system is not functioning properly, the engine may not start. Check the ignition coils, distributor, and ignition control module to make sure they are working properly.
4. Check the timing: If the timing is off, the engine may backfire and not start. Check the timing belt or chain to make sure it is properly aligned.
5. Check the compression: If the engine has low compression, it may not start properly. Check the compression using a compression tester.

If you are not familiar with these systems or are unsure how to check them, it is recommended that you take your vehicle to a qualified mechanic for diagnosis and repair.

Hi Timothy:
Old Dude wisdom..........
- Fire at the plugs and
- Fuel in the jugs

If everything else is OK it should run. Not necessarily well, but it should run.

What to do?
1) Check for hot blue spark at the plug electrodes
2) Check for fuel in the carb.

If you have spark, give it a shot of gas into the carb, and give it a try. If it doesn't start, backfires, or catches fire, you'll need to double check the timing and plug lead firing order.

Not kidding! Don't set fire to it!.

backfire is a timing issue ,if its to far advanced it will back fire out intake ,if it backfires out exhaust its to far retarted ,you may have a bad timing gear,and or chain or belt, start by checking timing if you can get it running infact go over ignition system to look for other problems

Compression, spark , timing , fuel for any engine to run. Don't forget a stopped up catalytic convertor will have the same effect as you described. Backfiring of course is fouled plugs, bad plug wires, look for arcing from wires when it is dark outside. If it has a distributor check for cracked cap, had my 91 GMC start backfiring then die due to ignition module inside distributor going bad. It would start back up after it cooled for about 10 minutes.

Check to see if your timing is off.

Pull out # 1 spark plug and put back into plug wire, rest on motor block so that end of electrode is against metal. turn motor over and have a finger or compression gauge in # 1 cylinder, check to see if spark occur at same time as compression (compression will blow air past finger or raise gauge). When you say it has fuel do you mean gas tank has fuel? Are you sure fuel is getting to the cylinders? are plugs wet with fuel? Does it turn over but kinda thumps or backfire (Caugh)? Check the spark and compression first. if they don't happen at same time, the timing skipped or belt broke. if all is good pull plugs and inspect, could be flooded (WET) from fuel. either replace or spray with starting fluid and compressed air to dry them. spray starting fluid into air intake if starts then stalls, try again, if same thing happens then you have a fuel problem. try these suggestions first 1/2 hr time table, hopefully sucess, if not it sure indicates fuel.

The cranking will usually sound different after the timing chain has slipped. Does it spit or backfire when you crank it? I suggest you rule out some easier things before going after the timing chain. If you are getting spark and fuel, then maybe I would take a peek at the timing chain to see if it has skipped on the sprocket.

Please see my tip at http://www.fixya.com/cars/r5821173-doesnt_car_start_gasoline_engines . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

first check fuel, then check to see if it is fireing at the spark plug. if it is fireing at plug, check to make sure it is getting fuel. ( should be able to smell fuel on the electrode end of spark pug). If it is getting fuel, and spark, you may try removeing all spark plugs, then shoot some oil into each spark plug hole. Replace plugs, and try to start. If it still wont try to start, may be out of time. Does it pop, backfire when you are cranking the engine?

AWESOME a real camaro problem.
backfire.
strong odor of gas because the gas isn't getting burned
caused from backfire. backfiring because the spark isnt sparking when its supposed to.
problems could be bad spark plug wires , bad plugs , bad ignition parts.
your gonna need to check wires for bad spots, check ignition coils and stuff like that. if all that stuff is ok, then your problems have to do with inside the engine. jumped time etc.

if it backfired then there must be spark , (usually) i would suggest checking if there is fuel pressure (listen to hear the fuel pump when you turn the key to the on position) if you dont hear anything then you may have a fuel pump issue..