Jun: You can test to see if the CPS is shorted or open. Use a good quality VOM and test the resistance at the CPS Plug. Its the smallest round plug on the EZL (ign module) 750 - 780 ohms, and .465 - .505 AC volts during cranking. The part is 117.00 bucks if you shop around.
Its a tough job getting it out, you'll need a helper or just let your "Tech" get it in for you....
Dave...

"93" 300TE 4 matic 187,000 miles

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