[rfmaster]

Originally Posted by bigdaddycaddy39

Also i noticed when i unpluged the timing wire so i could check timing the truck idled down and started running like crap and died out????

That's called set EST connector. With this one wire connector open ECM does NOT provide any timing control and SA timing is fixed (usually 0 deg). This will explain why engine is dying when you place it in drive - you do not have timing set correctly. Set EST connector is only used to set distributor base timing at idle (park or neutral). Stock engine will idle at very low RPM ~ 550. LO5 truck base timing is 0 deg BTDC. Once you set the timing, shut engine down, reconnect set EST connector, clear ECM codes by disconnecting battery for 30 seconds. Upon engine restart timing should be bouncing between 16 to 20 deg and idle speed around 600 to 625 RPM. It should not be stalling unless you have lost couple of cylinders and engine is misfiring badly.

//RF