1999 Tahoe timing issues

[Norton]

I have heard that there is a plug behind the glove box, that if you unplug it and plug it back in it will reset your timing to your computer. true or false

 

[SouthernHoe]

I know when I rebuilt mine I had to take it to be scanned and set with the computer. nothing I did would get it running right.

 

[Norton]

I hear you there been fitting it for a week

 

[SouthernHoe]

When I put mine back in I battled it over a month fooling with plugs, wires, cap rotor, etc...

It would run fine then spit and sputter then run fine, it was crazy. No consistancy whatsoever. Finally took it to a good GM mechanic and he scanned it and set the timing electronically in about 10 minutes. It was 21 degrees off.

 

[SunlitComet]

I have heard that there is a plug behind the glove box, that if you unplug it and plug it back in it will reset your timing to your computer. true or false

Norton that is for tbi engines. Your vortec requires a use of a scanner that. Can read CAM RETARD.you tun the engine to about 1000_1500 rpm. Later one for the 1999 pcms and you get your reading then. You adjust the dizzy till the reading is between -2.0° to +2.0 °. 0.0° is ideal. That is all.

 

[Norton]

ok thanks for the information