My 2000 hyundai accent wont start, its tumbling but no start. did some checks and realized that the plugs was not getting no current, the wires to the coil packs were giving current though. I changed the coil packs but still no spark and therefore no start..

Based on your description I would say there is a terminal in the box that is not making contact with a fuse or relay, or a wire is almost broken from a terminal.
I would check each circuit with a test light to see what is not being powered.

Did you try the fuel pump?

I think your problem may be MICE. Check your upper and lower O2 Sensor wires. I believe they are both 4 wire sensors. If a wire has been chewed through this is what happens. I personally had this problem myself once in my 2000 Hyundai Accent. GOOD LUCK.

Go to www.hmaservice.com and register your vehicle by VIN #..
you'll then have access to wiring diagrams, shop manuals,
service bulletins, illustrations, etc. To diagnose a 2000 or 2001 1.5L Accent Diagnostic Trouble Code (DTC) P1128 (FUEL SYSTEM LEAN -- PART LOAD), check the following:

• Check the intake system for air leaks.
• Check that the Mass Air Flow (MAF) Sensor (P/N 28164-22610) operation meets the specifications listed below. If the MAF sensor output is significantly lower than the reference value (10% or more), then replace the MAF sensor.

Table 1: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
3.5
5.1
7.4
MAF (kg/h) 10
21
30
47
RPM IDLE
2000
3000
4000
Table 2: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
3.5
5.1
7.4
MAF (g/h) 2.8
6
8.5
12.7
RPM IDLE
2000
3000
4000

WITH MANUAL TRANSMISSION

Table 3: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
2.4
3.9
5.9
MAF (kg/h) 9.5
19.4
28.8
43
RPM IDLE
2000
3000
4000
Table 4: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
2.4
3.9
5.9
MAF (g/h) 2.5
5.5
8
12
RPM IDLE
2000
3000
4000

itsounds like an immobillzer problem is the yellow key light on the instrument panel lighting up if not thats why there is no spark and i bet u dont hear the fuell pump running either

Yep!.. Typical with an engine cylinder misfire. Inspect the plug and ignition wire, especially the insulator. If you see a 'christmas tree' pattern on the insulator, that's where your problem is.

Possibly coils check compression make sure the plugs are the proper ones some engines are particuler about the plugs

check ignition module in the distributor

Have someone check the idle sensor. I had to have mine replaced along with another that I don't remember which one is was.

I HAD THIS PROBLEM WITH MY ACCENT 2000 TURNS OVER FINE BUT WONT FIRE TURNED THE LIGHTS ON AND WILL START, SOMETHING ELECTRICAL IM ASUMING