wiki.js/decoders/ChryslerNGC.md

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Chrysler NGC Decoder for engines with the Chrysler NGC pattern true 2022-01-08T13:28:41.019Z undefined 2021-10-12T16:19:05.254Z

Chrysler NGC (untested)

Overview

Decoder for 4, 6 and 8-cylinder engines equipped with the Chrysler NGC pattern. Seems to be used on some Chrysler/Jeep/Dodge vehicles from 2002 onward.

This decoder has only been tested on a simulator, please notify speeduino maintainers if you have success or issues with it.

Tuner Studio Configuration

  • Trigger Pattern: Chrysler NGC
  • Trigger Angle:
    • 4-cylinder: Should be set to 30 +- a few degrees for a stock setup. If both crank and cam sensors have reversed polarity -330 should work (for sequential).
    • 6 and 8-cylinder: Should be set to 210 +- a few degrees for a stock setup. If both crank and cam sensors have reversed polarity -150 should work (for sequential).
  • New ignition mode: On is recommended as it gives a more accurate spark angle.

Trigger Signal

All versions use the same 36+2-2 crank wheel but the 6 and 8-cyl has TDC 180 degrees away from the 4-cyl version. The crank wheel has 2 normal LOW missing teeth where the opposite side has two HIGH missing teeth.

4-cylinder

The 4-cyl trigger pattern uses a 7 tooth cam. The cam wheel teeth are mirrored. One side has a long HIGH tooth and the other has a long LOW tooth.

ngc_4_cylinder.jpg

6 and 8-cylinder

The 6 and 8-cyl cams are different but function in the same way. The position can be determined when knowing the number of teeth in two adjacent groups of teeth.

ngc_6-cyl_cam.pngngc_8-cyl_cam.png