No ignition I replaced the coils and still nothing.I don't have time to troubleshoot because of a business trip, what parts should I buy and trow at this thing?

Step one: buy new ignition coil
Step two: find bad ignition coil
Step three: replace the coil.

Seriously it is this easy, once you buy the new part you know what to look for in your engine bay. disconnect the old one and reconnect the new one in the same way.

Well, the old car still has a pulse, that\'s good. You need to be looking for the coil primary signal, when troubleshooting the ignition and you have no spark. Don\'t stop by asking here, buy a repair manual for your car or look for repair guides to help you do a step by step troubleshooting where you cover the whole process and don\'t miss anything. A repair manual will have the wiring diagram and pretty thorough troubleshooting guides for your Altima. Good place to start looking for where to find that coil primary wire going to coil pack, what color wire and which terminal in the connector it is. See? Makes it so much easier. As a self taught poor mechanic, I have lots of gaps in my knowledge of cars. So I never attempt any job like yours without a repair manual to consult.
Last question: did you put a new timing belt on too? I hope you did, if it is a timing belt driven water pump.
How the computer controls spark timing is after inputs from the crank position sensor and the cam position sensor, it computes the time to send a signal to ignition module to cut the coil primary circuit. That initiates high voltage in the coil secondary windings and right to the spark plug for a spark. So if you got no spark, you need to look at all these things in this paragraph-this is your ignition system, just add in the ignition switch for giggles, lol, and anything else I missed. But that\'s basically it. Do yourself a favor and buy a manual and a digital volt/ohm meter (DVOM), if you don\'t already have one. You can learn on it as you go. Good luck.

Personally I would locate an illustrated parts manual for your motor and determine if they are interchangeable. Also, check with a Suzuki dealership for interchangeability of the coils. I am a Harley man personally and I would not even think of putting coils on my motor that are not made for it. Bikes are funny creatures and often very unforgiving. Buy OEM parts made for your particiular model motor and you will be very happy. Don't risk it even if there is a chance they are interchangeable. Are you willing to burn up your ignition system for it?

Ignition timing is fixed by use of a flywheel 'key' that locks the flywheel to the crankshaft. If the key happens to shear, then the timing will be incorrect. Expose the flywheel and check the ignition module gap to the flywheel magnets by using a thin business card for a gauge. Turn the magnets under the module, insert the card, and loosen the module mounting screws. Allow the module to stick to the magnets, then tighten the screws. Rotate the flywheel to remove the card, then turn it one complete revolution to make sure the gap doesn't close up any further. Remove the spark plug and check for snappy, blue spark when the engine is pulled through. If no spark, remove the ignition switch wire from the ignition module, the retry for spark. If still nothing, replace the ignition module itself. If pulling the wire gives spark, then check the ignition switch and the wire for grounding at some point. Hope this helps!

The most likely cause is the ignition module failing once it gets hot. While not common it is not unheard of either. I suggest you replace the spark plug first and try it (<$5). If no better try this cold just to get a feel for it, then as soon as it cuts out try it again.
Ignition Coil Test by SmallEng.com
http://www.youtube.com/watch?v=L7WNBDRG4C4
You may need to use a jumper wire between the threaded part of the plug and the cooling fins. You do not have to bend up the electrode.

Ignition module gap
Place a business or index card between the fly wheel and coil, rotate until the magnetic attraction pulls everything tight together. Tighten the coil screws, rotate the flywheel until the attraction eases and remove the card. Ensure nothing contacts when the flywheel is rotated.

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.

If you have not already, change the plug first and try it (very cheap insurance). If problem persists try this, it even checks the wiring and ignition switch:

Ignition Coil Test by SmallEng.com
http://www.youtube.com/watch?v=L7WNBDRG4C4
You may need to use a jumper wire between the threaded part of the plug and the cooling fins. You do not have to bend up the electrode.

If asking about ignition coil gap, an index or business card is a good gap tool. Remove the plug, rotate until magnetic attraction pulls coil and card tight to flywheel, tighten the coil screws. Rotate flywheel until magnetic attraction eases, remove card, rotate a couple of revolutions and ensure nothing drags or contacts flywheel. HTH
Lou
If I completely missed the problem you are having you can reply below with a little more information and I will try again. If you need the part number of a replacement coil I need the model and serial if a Poulan to give you the correct answer.

replace the coil with a Honda coil. never buy after-market ignition parts with Honda's always buy genuine Honda parts. not only will it work better...but its actually cheaper in some cases..plus they have a much better warranty than most auto parts stores. this rule applies to Honda's and Toyota's Ignition system parts. I had similar issues with my old 1989 Honda accord. As an added measure apply "Di-Electric Grease" into all spark plug wire boots to help seal out any moisture (both plug ends and distributor ends). hope this helps.

I show $47 for each coil at rockauto.com here is the part #
STANDARD MOTOR PRODUCTS Part # UF406
here is a picture, is this the coil?

You'll want to check the coil packs on the engine by disconnecting them, one at a time, and temporarily replacing the fuse with a circuit breaker of the same rating. Try starting the engine with one coil disconnected (leave it on the engine, but disconnect the wire). If it stays running (though poorly) with a coil diconnected without tripping the breaker, you've found the bad coil and you can replace it easily.
Other than this, take the car into a competent mechanic to diagnose as many electrical issues involve sensitive electronic parts.