Question about 1997 Saab 900

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Proper connecting of spark plug wires to distributor cap

I just replace complete wirin distribtor cap and rotor but not firing properly not sure if i put wires back in proper order to cap

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Click this link: http://autorepair.about.com/library/firing_orders/bl-saab-firing-97.htm Choose the correct engine and you will see a diagram of spark plug wiring.

Posted on Aug 10, 2009

  • jmeray Jun 23, 2011

    This is somewhat helpful. Can you break it down a little further on the distributor cap. My cap looks like this:

    X
    X
    O
    X
    X

  • NOT ME Jun 24, 2011

    What size engine do you have.

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Re-Check the wires. One may have come loose. For external coils, check there first. Next, make sure that the rotor is properly seated inside the cap on the Distributor.
Did you also replace any of the spark plugs?
It could also be completely unrelated. Haha. Check for fuel pump operations, and that you are getting fuel. Its either air/fuel/spark.
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http://www.fixkick.com/IGN_timing/8v-procedure.html#fastplant


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I just replaced my wires, plugs, rotor and distributor cap in my 1988 suburban and it initially backfired and I rechecked to make sure that the wires were on both ends properly and they were. Since then it...


It sounds like thw firing order's wrong, rotor might be positioned wrong, or the distributor is off a notch. The distributor cap might be 180 degrees off as well.

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I have a '78 thunderbird with a 351m clevland engine i changed out the distributer cap, put the sparkplugs in correct firing order and now it wont start it turns over but its not firing im thinkin


simple things first, did you put the rotor back in ? I would start by connecitng a timing light to one of the plug wires and have a friend turn the engine over and see if the light flashes. (I use a remote starter switch on fords but make sure the ****** is in park) If the light does not flash, connect the timing light to the coil wire. It should flash now. If it does, the plug wires might not be in the correct fireing order. if it does not , the problem should be under the cap if it was running before. if you dont have a timing light, lift the coil wire off of the cap and hold the conductor close to the cap, less than 1/4 inch. Have a friend crank the engine. You should see a blue spark. if you do, repeat with a spark plug wire. If you have spark, the wires are probably wrong. Be careful not to get shocked. It wont hurt you but wont feel good either. If you have no spark and everything is in order and the rotore is installed properly, disconnect the battery and remove the ignition box on the inner fender. Look at the bottom side. If it has an area that looks sandy (literally) replace it. This is common on the duraspark ignition systems.

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I have just completed a tune up on my 1998 Ford Expedition 4.6 L V8 and the truck is backfiring and I can nor find the problem. I have the feeling that I crossed a wire and I cant figure out which on. ...


it definitely sounds like that you have a wire ,or wires crossed on the distributor cap, the firing order should be on the intake manifold, the best way to see what the direction of fire is , is to remove the distributor cap, and have someone crank over the engine, to see what direction the rotor is turning, then after cap is put back on, look for the #1 firing position on the cap, this will be # 1 plug wire, then you will have to continue onward following in the direction that the rotor turned, on the cap, following the firing order, 1 plug wire at a time.

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Did you take out the ENTIRE Distributor or just the cap?

If you took out the entire Distributor, and put it back in, there is a possibility that you put it in backwards. The bottom of the Distributor has a 'notch' in it. If you turn it 180 degrees the wrong way, and put it back in, your truck will not start, because it is in effect 180 degrees out of alignment with the timing.

If you only took out the cap, refer to your owners manual (Hanes is best) for the plug wire placement in reference to the firing order, and make sure all the plug wires are in the correct locations. Also, make sure your plug wires are seated all the way down onto the plugs, and the cap is secured tightly onto the base of the Distributor.

Make sure your Coil Wires are also seated properly to the coil and the Distributor.

Clean the battery connections. Remove the battery connections, clean them and reinstall.

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Timing putting it back in time


Resetting the timing is easier than it sounds. You can "fine tune" the timing using the distributor. First be sure the plug wires are connected properly to the distributor cap and spark plugs. Make sure the rotor is on it's post properly. Once these steps are done, loosen the screw under the edge of the distributor that keeps it locked in position so that you can turn the entire distributor. Next start the car and be careful when you touch the distributor as it has electrical current running through it and turn it slightly monitoring the engine to see if it runs better or worse. If it gets worse turn it the other direction. Once the engine runs properly secure the screw.

If the engine is running rough still the firing order is probably off. The order should be: 1 2 3 4 5 6 Distributor turns clockwise.
Right, or back bank of cylinders are the odd numbered ones.

Good luck to you

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1 Answer

No spark from plugs. changed plugs, rotor and distributor, cables, and primary coil.


i would start with the basics- did you make sure you followed the correct firing order when you installed your new plug wires? when you changed the cap/rotor did you notice any track marks inside the old cap? was the old rotor burnt/corroded? ive got a 97 ram and the cap is a b*tch to get to being buried in the back, could you have inadvertently moved the rotor off its timing mark? mis-aligned the crank sensor when installing your new cap? i would recheck how the cap was installed, just because you were able to position it proper and tightened down the screws doesnt mean that you didnt accidently pinch the wires on the crank sensor, or turned the rotor off its mark. also when pressing on the plug wires on the cap did you look for the "1" mark on the cap? this is your reference point for firing order. im not sure these are you problems, but rechecking your work to make sure something wasnt knocked off-kilter, or wrong plug wire placement would confirm the problem lies other than what was replaced. i hope this helps

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