1992 transport no spark

1992 3.8 l no spark i changed the coils and the plate and still not getting spark. i got codes 17 18 and 42. now i'm not really good at figuring out what the combination of the 3 codes may cause this. if anyone can lead me in some direction please help. i also have a 1994 3.8 transport that runs fine but the trans is blown so i can pull parts off of it to trouble shoot. thank you

Verify DTC 17,18,42 at www.avigex.ca/xport

These codes together will usaly lead tot he Crank sensor, but you will not be able to use the 94 Crank sensor on the 92... The 93-08 3800's used a set it and forget it crank sensor... The 92's are adjustable....

ok i changed the crank and cam sensor still no spark. oh thanks for saving me time by letting me know that the 2 different year vans didn't have the same crank sensor. i am getting around 3 ac volts from the crank sensor. at this point im thinking a wire maybe shorting out some where.

Did the problem develop all of a sudden of did you have some signs before it went dead? WHen these three codes come altogether at once, all relating to same area, usually suspect a single problem that reflects on these. Check supply voltage to sensors; since the PCM is able to recognize problems, this one is probably correctly fed with 12v. Some weird problems have been traced to the ignition switch/wiring in the past. Basic first....
The 3 volt from crank sensor is OK but did you take that measurement before or after the ignition module? In my case, I did not have voltage after the ignition odule, but I had the voltage ahead . IN my case, the ignition module was shot, I know you switched yours, but check if you have 12v supply and ground to the ignition module: this has also been reported a problem in the past.

the problem ended up being a faulty ground wire in the wiring harness between the coils and crank/cam sensor. replaced wiring harness all good now. thank you guys so much for all the help.