85 Check Engine light

[detroitgear]

Hey I'm new to posting on the fourm but I've visited a few times before. I've got a 1985 SR5 that just got out of the engine shop after I burnt up the motor the last time from running it out of water lol. The motor has been bored to 40 over and the head was shaved some along with the block getting decked. Had a new geared timing chain put on along with a header. The Check Engine light comes on after the motor reaches 3k rpms and stays on. It usually doesn't come on at start up or after idling or slow crusing. I've changed the O2 sensor on the header because some of the wire were split. Just wondering if anyone had any idea what it might be? It doesn't effect the truck I just want everything working right before I mess it up. thanks for any help

[ttownjoeshow]

Hi, do a search for checking code, on this site. You can do it your self... you put a jumper in a wire connection and count how many times your check engine light flashes and either post the code or search it. Yours might be different then mine so I don't want to steer you in the wrong direction

[Jayota]

te1 and e1 are the connectors you gotta jump.

Use a pen to jot down the blinks of the CEL and go online to decifer it.