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  #1  
Old 02-28-2011, 08:58 PM
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Default Engine crancks over but not firing

Truck is a 2000 Mazda B3000, 5 speed manual.

I tried to start the truck with no success. It has a strong crank as normal but the engine will not fire even if I keep the key turned on for a few seconds. I checked the fuel filter and it has good flow; I hear the hum from the fuel pump and hear the click of the pump relay. Battery is new. I looked at the factory service manual but did not find a troubleshooting section that will guide me into solving this problem.

The truck is not driven that much...so it sits on the driveway most of the time - battery disconnected; I turn it on once a week. Last time it started right away.

What else should I check to get it starting again? Thanks for your input.
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  #2  
Old 02-28-2011, 09:13 PM
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Default Re: Engine crancks over but not firing

check for spark
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  #3  
Old 02-28-2011, 09:34 PM
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Default Re: Engine crancks over but not firing

DHEM, do you have a "preferred" method to check for spark?
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  #4  
Old 02-28-2011, 10:10 PM
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Default Re: Engine crancks over but not firing

Check your fuses. with all the battery disconnecting and re connecting you may have blown one of the ignition fuses that drives your injectors. This happened to on another car i once had. And yes i was doing the same thing to it with the battery as you say you are doing now.

----------

If that dont work then check your spark as mentioned above. My idea is just easier to check for so i could look at that first.
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  #5  
Old 03-01-2011, 06:41 AM
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Default Re: Engine crancks over but not firing

pull the plugs, keep them attached to the wire and hold them somewhere away from the spark plug hole and have a friend crank over the engine, you should see spark.
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'05 2wd Ranger xl with the 3.0

MODS-Alpine head unit, throttle cable mod, Black Rock wheels, FX4 lvl II axle swap, pooleo's camo painted bezel and mustang dome, painted/aftermarket headlights/tails fold-a-cover and over 100 hp in stickers
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  #6  
Old 03-01-2011, 05:16 PM
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Default Re: Engine crancks over but not firing

Quote:
Originally Posted by blueranger1801
Check your fuses.
All fuses in the engine compartment fuse box are good.


Quote:
Originally Posted by DHEM
pull the plugs, keep them attached to the wire and hold them somewhere away from the spark plug hole and have a friend crank over the engine, you should see spark.
Is one plug enough to check for spark? Do you do it with each one of the plugs? It is a very congested engine compartment; there is no easy access to all the plugs.
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  #7  
Old 03-01-2011, 05:26 PM
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Default Re: Engine crancks over but not firing

you gotta check them all, you can try to get at some through the inside fender wells
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'05 2wd Ranger xl with the 3.0

MODS-Alpine head unit, throttle cable mod, Black Rock wheels, FX4 lvl II axle swap, pooleo's camo painted bezel and mustang dome, painted/aftermarket headlights/tails fold-a-cover and over 100 hp in stickers
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  #8  
Old 03-01-2011, 05:27 PM
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Default Re: Engine crancks over but not firing

Yeah one is enough, if you see spark, eliminate that as the problem and move onto the test for fuel injector operation by removing the air cleaner from the throttle body, holding open the throttle plate and spraying two seconds worth of starting fluid past it into the opening. Then head to the ignition and see if it kicks over. If it does, then you've narrowed it down to fuel delivery or something that controls fuel delivery.
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  #9  
Old 03-08-2011, 08:08 PM
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Default Re: Engine crancks over but not firing

I have so far checked the three spark plugs on driver side of the engine. I see spark on all three. But the spark electrodes are almost gone...not much of them left... so the gap is really big. Is this huge gap preventing the engine from firing? Or it does not matter as long as there is spark? I want to be sure the spark plugs are not the culprit before I move on to test the fuel system.
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  #10  
Old 11-01-2011, 02:05 PM
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Default Re: Engine crancks over but not firing

I'm in the same boat...My 99 3.0 isn't getting fire on any cylinder i have replaced the coil and it made no differance. I put a new battery on becouse it sounds like the battery is not fully charged when I try to start the truck, any ideas??
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  #11  
Old 11-01-2011, 07:13 PM
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Default

Timing belt?
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  #12  
Old 11-02-2011, 11:37 AM
1999 4X4
 
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Default Re: Engine crancks over but not firing

I'm not sure, it has spells where it don't want to start, i'll let it sit for a few minutes then it will start back up...at the point now where it don't fire any...no fire out of the coil pack...brand new oem coil pack...??
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  #13  
Old 11-03-2011, 08:56 PM
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Default Re: Engine crancks over but not firing

Sounds like a faulty/intermittent ignition module or crankshaft position sensor.
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  #14  
Old 11-04-2011, 10:08 AM
1999 4X4
 
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Default Re: Engine crancks over but not firing

I had a ford mech tell me that if the check engine don't turn off when you turn the truck over then it could be a bad PCM, any ideas on where that puppy is??
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  #15  
Old 11-07-2011, 04:03 PM
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Default Re: Engine crancks over but not firing

I solved my problem by just replacing all the spark plugs with new ones. The engine fired up with no problem after that.
I do not know if it will be the same in your case, but you can try the simple stuff first before going into more complex diagnosis/fixes. Good luck.
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