Code 42

[Shannen Durphey]

Martin Powlette wrote:
> 
> It me again and my luck with TBI 5.7 V8's . I checked the ignition
> timing and set it to O TDC by specs, but there is code 42, ignition
> wiring or faulty ign.module. If I clear the code it comes back as soon
> as you start up and idle for even two minutes.  What do you guys think
> ?? The pick up coil 9K, leads,cap and rotor are ok  One other thing it
> stalls right after hard braking or sudden slow down especially down
> hill. Can I adjust the idle speed off the tamper proof plug??
> Any quick tests.  What about the ign. coil??
> 
> Martin

This code *always* sets when you disconnect the 5V bypass (tan/blk)
connector to set the timing.  With it disconnected, the ecm has no way
to adjust timing from base.
Check it out.
Shannen