trafficlightguy

I an old school hot rodder Never did much with car computers, my question is I have a 305 TBI with both Tbi Mods done, LT1 Cam bigger springs and 1.6 rockers and long tube headers. Once the engine is in and hooked up will the car run or should I say start with the factory chip. just to see if the engine rebuild was done and looking for major issues

thanks

chris

Tuned Performance

iTrader: (92)

It will start with your stock L03 tune but to optimize your engine you will need to datalog and re burn your eprom. If you are using long tube headers and the o2 sensor is now down stream it will be harder for it to get up to 500 degrees to start working. You should install a heated o2.

trafficlightguy

cool thanks for you answer, Yea been looking at summit for the heated o2 sensor cause I have the single wire one

Tuned Performance

iTrader: (92)

Part number for the sensor.
25312179 (AFS-74)
Weather pack connector.
12126012 pt643

http://www.ebay.com/itm/ACDELCO-OE-S...#ht_1050wt_931

http://www.casperselectronics.com/st...oducts_id=1068

ninetyone

iTrader: (2)

I used a 4 wire heated from a 95' Buick 3.8L. It was about $35

Tuned Performance

iTrader: (92)

http://www.ebay.com/itm/O2-SENSOR-SG...c#ht_500wt_982

ninetyone

iTrader: (2)

i am not sure if that would work correctly I think it does matter which one u use. I used a Bosch from Napa

ninetyone

iTrader: (2)

IIRC, the AFS-74 part number worked in sync with certain aspects of the 7730 ecm better than our factory sensor

Tuned Performance

iTrader: (92)

you can use either with the 4 wire pins A and C will be grounds you can tie these two together on a pigtail harness. pin D will be the accessory powered 12v use a 10 amp fuse inline to protect this circuit. Pin B will hook to your factory purple oxygen sensor wire.