Timing question

[spooldup]

Our timing should be 0 at idle right? If so what happend here? We installed a new distibuter and stuff. We then set the timing with the bypass unplugged and set it to zero. We then plugged it back in and checked the truck. It was zero. It's been like a month so i checked it again at idle and it's at 27. WTF?

 

[Loeryder]

Are you disconnecting the tan wire to check it?

If that wire is connected then the ECM is commanding Advance.

Pull your ECM B fuse after checking to reset any trouble codes that were stored while tan wire was disconnected.

 

[TurboTony]

Once the timing connector is disconnected it reverts to base timing, zero.

When the connector is unplugged the ECM sets a code 42 and doesn't send a timing signal until two things happen. The line must be reconnected and the ecm must be powered down.

The reason that it still showed zero when you connected it the first time is likley because you didn't power the ecm down.

What happened to you is totally normal provided you didn't disconnect the connector the second time. The ecm calls for about 27 degrees at idle if memory serves.

HTH

Tony

 

[spooldup]

ok. Now i understand. This is what i was doing anyway. John w wanted me to shoot the gun and then rev the truck up to see if it moves. My ty idles horribly and i have done everything to try and correct it. When we did the pickup coil, and module we noticed a line that looked like a crack but we couldn't catch an edge so we ruled it out as nothing. I then found out that if it was a crack that i would not be able to grab an edge due to the fact that the magnet is compressed by a metal ring. So i was told to do the timing trick to see if it moves while revving up.